[XFS] Fix merge failures

Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	fs/xfs/linux-2.6/xfs_cred.h
	fs/xfs/linux-2.6/xfs_globals.h
	fs/xfs/linux-2.6/xfs_ioctl.c
	fs/xfs/xfs_vnodeops.h

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

27 files changed, 2008 insertions, 1501 deletions

diff --git a/security/capability.c b/security/capability.c
index 24587481903..2dce66fcb99 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -32,24 +32,19 @@ static int cap_quota_on(struct dentry *dentry)
 	return 0;
 }
 
-static int cap_bprm_alloc_security(struct linux_binprm *bprm)
+static int cap_bprm_check_security (struct linux_binprm *bprm)
 {
 	return 0;
 }
 
-static void cap_bprm_free_security(struct linux_binprm *bprm)
+static void cap_bprm_committing_creds(struct linux_binprm *bprm)
 {
 }
 
-static void cap_bprm_post_apply_creds(struct linux_binprm *bprm)
+static void cap_bprm_committed_creds(struct linux_binprm *bprm)
 {
 }
 
-static int cap_bprm_check_security(struct linux_binprm *bprm)
-{
-	return 0;
-}
-
 static int cap_sb_alloc_security(struct super_block *sb)
 {
 	return 0;
@@ -64,7 +59,7 @@ static int cap_sb_copy_data(char *orig, char *copy)
 	return 0;
 }
 
-static int cap_sb_kern_mount(struct super_block *sb, void *data)
+static int cap_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
 	return 0;
 }
@@ -330,7 +325,7 @@ static int cap_file_receive(struct file *file)
 	return 0;
 }
 
-static int cap_dentry_open(struct file *file)
+static int cap_dentry_open(struct file *file, const struct cred *cred)
 {
 	return 0;
 }
@@ -340,15 +335,29 @@ static int cap_task_create(unsigned long clone_flags)
 	return 0;
 }
 
-static int cap_task_alloc_security(struct task_struct *p)
+static void cap_cred_free(struct cred *cred)
+{
+}
+
+static int cap_cred_prepare(struct cred *new, const struct cred *old, gfp_t gfp)
 {
 	return 0;
 }
 
-static void cap_task_free_security(struct task_struct *p)
+static void cap_cred_commit(struct cred *new, const struct cred *old)
 {
 }
 
+static int cap_kernel_act_as(struct cred *new, u32 secid)
+{
+	return 0;
+}
+
+static int cap_kernel_create_files_as(struct cred *new, struct inode *inode)
+{
+	return 0;
+}
+
 static int cap_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
 {
 	return 0;
@@ -750,7 +759,7 @@ static void cap_release_secctx(char *secdata, u32 seclen)
 }
 
 #ifdef CONFIG_KEYS
-static int cap_key_alloc(struct key *key, struct task_struct *ctx,
+static int cap_key_alloc(struct key *key, const struct cred *cred,
 			 unsigned long flags)
 {
 	return 0;
@@ -760,7 +769,7 @@ static void cap_key_free(struct key *key)
 {
 }
 
-static int cap_key_permission(key_ref_t key_ref, struct task_struct *context,
+static int cap_key_permission(key_ref_t key_ref, const struct cred *cred,
 			      key_perm_t perm)
 {
 	return 0;
@@ -814,8 +823,7 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, ptrace_may_access);
 	set_to_cap_if_null(ops, ptrace_traceme);
 	set_to_cap_if_null(ops, capget);
-	set_to_cap_if_null(ops, capset_check);
-	set_to_cap_if_null(ops, capset_set);
+	set_to_cap_if_null(ops, capset);
 	set_to_cap_if_null(ops, acct);
 	set_to_cap_if_null(ops, capable);
 	set_to_cap_if_null(ops, quotactl);
@@ -824,11 +832,9 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, syslog);
 	set_to_cap_if_null(ops, settime);
 	set_to_cap_if_null(ops, vm_enough_memory);
-	set_to_cap_if_null(ops, bprm_alloc_security);
-	set_to_cap_if_null(ops, bprm_free_security);
-	set_to_cap_if_null(ops, bprm_apply_creds);
-	set_to_cap_if_null(ops, bprm_post_apply_creds);
-	set_to_cap_if_null(ops, bprm_set_security);
+	set_to_cap_if_null(ops, bprm_set_creds);
+	set_to_cap_if_null(ops, bprm_committing_creds);
+	set_to_cap_if_null(ops, bprm_committed_creds);
 	set_to_cap_if_null(ops, bprm_check_security);
 	set_to_cap_if_null(ops, bprm_secureexec);
 	set_to_cap_if_null(ops, sb_alloc_security);
@@ -890,10 +896,13 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, file_receive);
 	set_to_cap_if_null(ops, dentry_open);
 	set_to_cap_if_null(ops, task_create);
-	set_to_cap_if_null(ops, task_alloc_security);
-	set_to_cap_if_null(ops, task_free_security);
+	set_to_cap_if_null(ops, cred_free);
+	set_to_cap_if_null(ops, cred_prepare);
+	set_to_cap_if_null(ops, cred_commit);
+	set_to_cap_if_null(ops, kernel_act_as);
+	set_to_cap_if_null(ops, kernel_create_files_as);
 	set_to_cap_if_null(ops, task_setuid);
-	set_to_cap_if_null(ops, task_post_setuid);
+	set_to_cap_if_null(ops, task_fix_setuid);
 	set_to_cap_if_null(ops, task_setgid);
 	set_to_cap_if_null(ops, task_setpgid);
 	set_to_cap_if_null(ops, task_getpgid);
@@ -910,7 +919,6 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, task_wait);
 	set_to_cap_if_null(ops, task_kill);
 	set_to_cap_if_null(ops, task_prctl);
-	set_to_cap_if_null(ops, task_reparent_to_init);
 	set_to_cap_if_null(ops, task_to_inode);
 	set_to_cap_if_null(ops, ipc_permission);
 	set_to_cap_if_null(ops, ipc_getsecid);
diff --git a/security/commoncap.c b/security/commoncap.c
index 3976613db82..79713545cd6 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/capability.h>
+#include <linux/audit.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -29,7 +30,7 @@
 
 int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
 {
-	NETLINK_CB(skb).eff_cap = current->cap_effective;
+	NETLINK_CB(skb).eff_cap = current_cap();
 	return 0;
 }
 
@@ -39,23 +40,41 @@ int cap_netlink_recv(struct sk_buff *skb, int cap)
 		return -EPERM;
 	return 0;
 }
-
 EXPORT_SYMBOL(cap_netlink_recv);
 
-/*
+/**
+ * cap_capable - Determine whether a task has a particular effective capability
+ * @tsk: The task to query
+ * @cap: The capability to check for
+ * @audit: Whether to write an audit message or not
+ *
+ * Determine whether the nominated task has the specified capability amongst
+ * its effective set, returning 0 if it does, -ve if it does not.
+ *
  * NOTE WELL: cap_capable() cannot be used like the kernel's capable()
- * function.  That is, it has the reverse semantics: cap_capable()
- * returns 0 when a task has a capability, but the kernel's capable()
- * returns 1 for this case.
+ * function.  That is, it has the reverse semantics: cap_capable() returns 0
+ * when a task has a capability, but the kernel's capable() returns 1 for this
+ * case.
  */
-int cap_capable (struct task_struct *tsk, int cap)
+int cap_capable(struct task_struct *tsk, int cap, int audit)
 {
+	__u32 cap_raised;
+
 	/* Derived from include/linux/sched.h:capable. */
-	if (cap_raised(tsk->cap_effective, cap))
-		return 0;
-	return -EPERM;
+	rcu_read_lock();
+	cap_raised = cap_raised(__task_cred(tsk)->cap_effective, cap);
+	rcu_read_unlock();
+	return cap_raised ? 0 : -EPERM;
 }
 
+/**
+ * cap_settime - Determine whether the current process may set the system clock
+ * @ts: The time to set
+ * @tz: The timezone to set
+ *
+ * Determine whether the current process may set the system clock and timezone
+ * information, returning 0 if permission granted, -ve if denied.
+ */
 int cap_settime(struct timespec *ts, struct timezone *tz)
 {
 	if (!capable(CAP_SYS_TIME))
@@ -63,121 +82,157 @@ int cap_settime(struct timespec *ts, struct timezone *tz)
 	return 0;
 }
 
+/**
+ * cap_ptrace_may_access - Determine whether the current process may access
+ *			   another
+ * @child: The process to be accessed
+ * @mode: The mode of attachment.
+ *
+ * Determine whether a process may access another, returning 0 if permission
+ * granted, -ve if denied.
+ */
 int cap_ptrace_may_access(struct task_struct *child, unsigned int mode)
 {
-	/* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
-	if (cap_issubset(child->cap_permitted, current->cap_permitted))
-		return 0;
-	if (capable(CAP_SYS_PTRACE))
-		return 0;
-	return -EPERM;
+	int ret = 0;
+
+	rcu_read_lock();
+	if (!cap_issubset(__task_cred(child)->cap_permitted,
+			  current_cred()->cap_permitted) &&
+	    !capable(CAP_SYS_PTRACE))
+		ret = -EPERM;
+	rcu_read_unlock();
+	return ret;
 }
 
+/**
+ * cap_ptrace_traceme - Determine whether another process may trace the current
+ * @parent: The task proposed to be the tracer
+ *
+ * Determine whether the nominated task is permitted to trace the current
+ * process, returning 0 if permission is granted, -ve if denied.
+ */
 int cap_ptrace_traceme(struct task_struct *parent)
 {
-	/* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
-	if (cap_issubset(current->cap_permitted, parent->cap_permitted))
-		return 0;
-	if (has_capability(parent, CAP_SYS_PTRACE))
-		return 0;
-	return -EPERM;
+	int ret = 0;
+
+	rcu_read_lock();
+	if (!cap_issubset(current_cred()->cap_permitted,
+			  __task_cred(parent)->cap_permitted) &&
+	    !has_capability(parent, CAP_SYS_PTRACE))
+		ret = -EPERM;
+	rcu_read_unlock();
+	return ret;
 }
 
-int cap_capget (struct task_struct *target, kernel_cap_t *effective,
-		kernel_cap_t *inheritable, kernel_cap_t *permitted)
+/**
+ * cap_capget - Retrieve a task's capability sets
+ * @target: The task from which to retrieve the capability sets
+ * @effective: The place to record the effective set
+ * @inheritable: The place to record the inheritable set
+ * @permitted: The place to record the permitted set
+ *
+ * This function retrieves the capabilities of the nominated task and returns
+ * them to the caller.
+ */
+int cap_capget(struct task_struct *target, kernel_cap_t *effective,
+	       kernel_cap_t *inheritable, kernel_cap_t *permitted)
 {
+	const struct cred *cred;
+
 	/* Derived from kernel/capability.c:sys_capget. */
-	*effective = target->cap_effective;
-	*inheritable = target->cap_inheritable;
-	*permitted = target->cap_permitted;
+	rcu_read_lock();
+	cred = __task_cred(target);
+	*effective   = cred->cap_effective;
+	*inheritable = cred->cap_inheritable;
+	*permitted   = cred->cap_permitted;
+	rcu_read_unlock();
 	return 0;
 }
 
-#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
-
-static inline int cap_block_setpcap(struct task_struct *target)
-{
-	/*
-	 * No support for remote process capability manipulation with
-	 * filesystem capability support.
-	 */
-	return (target != current);
-}
-
+/*
+ * Determine whether the inheritable capabilities are limited to the old
+ * permitted set.  Returns 1 if they are limited, 0 if they are not.
+ */
 static inline int cap_inh_is_capped(void)
 {
-	/*
-	 * Return 1 if changes to the inheritable set are limited
-	 * to the old permitted set. That is, if the current task
-	 * does *not* possess the CAP_SETPCAP capability.
-	 */
-	return (cap_capable(current, CAP_SETPCAP) != 0);
-}
-
-static inline int cap_limit_ptraced_target(void) { return 1; }
-
-#else /* ie., ndef CONFIG_SECURITY_FILE_CAPABILITIES */
+#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 
-static inline int cap_block_setpcap(struct task_struct *t) { return 0; }
-static inline int cap_inh_is_capped(void) { return 1; }
-static inline int cap_limit_ptraced_target(void)
-{
-	return !capable(CAP_SETPCAP);
+	/* they are so limited unless the current task has the CAP_SETPCAP
+	 * capability
+	 */
+	if (cap_capable(current, CAP_SETPCAP, SECURITY_CAP_AUDIT) == 0)
+		return 0;
+#endif
+	return 1;
 }
 
-#endif /* def CONFIG_SECURITY_FILE_CAPABILITIES */
-
-int cap_capset_check (struct task_struct *target, kernel_cap_t *effective,
-		      kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-	if (cap_block_setpcap(target)) {
-		return -EPERM;
-	}
-	if (cap_inh_is_capped()
-	    && !cap_issubset(*inheritable,
-			     cap_combine(target->cap_inheritable,
-					 current->cap_permitted))) {
+/**
+ * cap_capset - Validate and apply proposed changes to current's capabilities
+ * @new: The proposed new credentials; alterations should be made here
+ * @old: The current task's current credentials
+ * @effective: A pointer to the proposed new effective capabilities set
+ * @inheritable: A pointer to the proposed new inheritable capabilities set
+ * @permitted: A pointer to the proposed new permitted capabilities set
+ *
+ * This function validates and applies a proposed mass change to the current
+ * process's capability sets.  The changes are made to the proposed new
+ * credentials, and assuming no error, will be committed by the caller of LSM.
+ */
+int cap_capset(struct cred *new,
+	       const struct cred *old,
+	       const kernel_cap_t *effective,
+	       const kernel_cap_t *inheritable,
+	       const kernel_cap_t *permitted)
+{
+	if (cap_inh_is_capped() &&
+	    !cap_issubset(*inheritable,
+			  cap_combine(old->cap_inheritable,
+				      old->cap_permitted)))
 		/* incapable of using this inheritable set */
 		return -EPERM;
-	}
+
 	if (!cap_issubset(*inheritable,
-			   cap_combine(target->cap_inheritable,
-				       current->cap_bset))) {
+			  cap_combine(old->cap_inheritable,
+				      old->cap_bset)))
 		/* no new pI capabilities outside bounding set */
 		return -EPERM;
-	}
 
 	/* verify restrictions on target's new Permitted set */
-	if (!cap_issubset (*permitted,
-			   cap_combine (target->cap_permitted,
-					current->cap_permitted))) {
+	if (!cap_issubset(*permitted, old->cap_permitted))
 		return -EPERM;
-	}
 
 	/* verify the _new_Effective_ is a subset of the _new_Permitted_ */
-	if (!cap_issubset (*effective, *permitted)) {
+	if (!cap_issubset(*effective, *permitted))
 		return -EPERM;
-	}
 
+	new->cap_effective   = *effective;
+	new->cap_inheritable = *inheritable;
+	new->cap_permitted   = *permitted;
 	return 0;
 }
 
-void cap_capset_set (struct task_struct *target, kernel_cap_t *effective,
-		     kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-	target->cap_effective = *effective;
-	target->cap_inheritable = *inheritable;
-	target->cap_permitted = *permitted;
-}
-
+/*
+ * Clear proposed capability sets for execve().
+ */
 static inline void bprm_clear_caps(struct linux_binprm *bprm)
 {
-	cap_clear(bprm->cap_post_exec_permitted);
+	cap_clear(bprm->cred->cap_permitted);
 	bprm->cap_effective = false;
 }
 
 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 
+/**
+ * cap_inode_need_killpriv - Determine if inode change affects privileges
+ * @dentry: The inode/dentry in being changed with change marked ATTR_KILL_PRIV
+ *
+ * Determine if an inode having a change applied that's marked ATTR_KILL_PRIV
+ * affects the security markings on that inode, and if it is, should
+ * inode_killpriv() be invoked or the change rejected?
+ *
+ * Returns 0 if granted; +ve if granted, but inode_killpriv() is required; and
+ * -ve to deny the change.
+ */
 int cap_inode_need_killpriv(struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
@@ -192,6 +247,14 @@ int cap_inode_need_killpriv(struct dentry *dentry)
 	return 1;
 }
 
+/**
+ * cap_inode_killpriv - Erase the security markings on an inode
+ * @dentry: The inode/dentry to alter
+ *
+ * Erase the privilege-enhancing security markings on an inode.
+ *
+ * Returns 0 if successful, -ve on error.
+ */
 int cap_inode_killpriv(struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
@@ -202,19 +265,75 @@ int cap_inode_killpriv(struct dentry *dentry)
 	return inode->i_op->removexattr(dentry, XATTR_NAME_CAPS);
 }
 
-static inline int cap_from_disk(struct vfs_cap_data *caps,
-				struct linux_binprm *bprm, unsigned size)
+/*
+ * Calculate the new process capability sets from the capability sets attached
+ * to a file.
+ */
+static inline int bprm_caps_from_vfs_caps(struct cpu_vfs_cap_data *caps,
+					  struct linux_binprm *bprm,
+					  bool *effective)
+{
+	struct cred *new = bprm->cred;
+	unsigned i;
+	int ret = 0;
+
+	if (caps->magic_etc & VFS_CAP_FLAGS_EFFECTIVE)
+		*effective = true;
+
+	CAP_FOR_EACH_U32(i) {
+		__u32 permitted = caps->permitted.cap[i];
+		__u32 inheritable = caps->inheritable.cap[i];
+
+		/*
+		 * pP' = (X & fP) | (pI & fI)
+		 */
+		new->cap_permitted.cap[i] =
+			(new->cap_bset.cap[i] & permitted) |
+			(new->cap_inheritable.cap[i] & inheritable);
+
+		if (permitted & ~new->cap_permitted.cap[i])
+			/* insufficient to execute correctly */
+			ret = -EPERM;
+	}
+
+	/*
+	 * For legacy apps, with no internal support for recognizing they
+	 * do not have enough capabilities, we return an error if they are
+	 * missing some "forced" (aka file-permitted) capabilities.
+	 */
+	return *effective ? ret : 0;
+}
+
+/*
+ * Extract the on-exec-apply capability sets for an executable file.
+ */
+int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps)
 {
+	struct inode *inode = dentry->d_inode;
 	__u32 magic_etc;
 	unsigned tocopy, i;
-	int ret;
+	int size;
+	struct vfs_cap_data caps;
+
+	memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
+
+	if (!inode || !inode->i_op || !inode->i_op->getxattr)
+		return -ENODATA;
+
+	size = inode->i_op->getxattr((struct dentry *)dentry, XATTR_NAME_CAPS, &caps,
+				   XATTR_CAPS_SZ);
+	if (size == -ENODATA || size == -EOPNOTSUPP)
+		/* no data, that's ok */
+		return -ENODATA;
+	if (size < 0)
+		return size;
 
 	if (size < sizeof(magic_etc))
 		return -EINVAL;
 
-	magic_etc = le32_to_cpu(caps->magic_etc);
+	cpu_caps->magic_etc = magic_etc = le32_to_cpu(caps.magic_etc);
 
-	switch ((magic_etc & VFS_CAP_REVISION_MASK)) {
+	switch (magic_etc & VFS_CAP_REVISION_MASK) {
 	case VFS_CAP_REVISION_1:
 		if (size != XATTR_CAPS_SZ_1)
 			return -EINVAL;
@@ -229,77 +348,48 @@ static inline int cap_from_disk(struct vfs_cap_data *caps,
 		return -EINVAL;
 	}
 
-	if (magic_etc & VFS_CAP_FLAGS_EFFECTIVE) {
-		bprm->cap_effective = true;
-	} else {
-		bprm->cap_effective = false;
-	}
-
-	ret = 0;
-
 	CAP_FOR_EACH_U32(i) {
-		__u32 value_cpu;
-
-		if (i >= tocopy) {
-			/*
-			 * Legacy capability sets have no upper bits
-			 */
-			bprm->cap_post_exec_permitted.cap[i] = 0;
-			continue;
-		}
-		/*
-		 * pP' = (X & fP) | (pI & fI)
-		 */
-		value_cpu = le32_to_cpu(caps->data[i].permitted);
-		bprm->cap_post_exec_permitted.cap[i] =
-			(current->cap_bset.cap[i] & value_cpu) |
-			(current->cap_inheritable.cap[i] &
-				le32_to_cpu(caps->data[i].inheritable));
-		if (value_cpu & ~bprm->cap_post_exec_permitted.cap[i]) {
-			/*
-			 * insufficient to execute correctly
-			 */
-			ret = -EPERM;
-		}
+		if (i >= tocopy)
+			break;
+		cpu_caps->permitted.cap[i] = le32_to_cpu(caps.data[i].permitted);
+		cpu_caps->inheritable.cap[i] = le32_to_cpu(caps.data[i].inheritable);
 	}
 
-	/*
-	 * For legacy apps, with no internal support for recognizing they
-	 * do not have enough capabilities, we return an error if they are
-	 * missing some "forced" (aka file-permitted) capabilities.
-	 */
-	return bprm->cap_effective ? ret : 0;
+	return 0;
 }
 
-/* Locate any VFS capabilities: */
-static int get_file_caps(struct linux_binprm *bprm)
+/*
+ * Attempt to get the on-exec apply capability sets for an executable file from
+ * its xattrs and, if present, apply them to the proposed credentials being
+ * constructed by execve().
+ */
+static int get_file_caps(struct linux_binprm *bprm, bool *effective)
 {
 	struct dentry *dentry;
 	int rc = 0;
-	struct vfs_cap_data vcaps;
-	struct inode *inode;
+	struct cpu_vfs_cap_data vcaps;
 
 	bprm_clear_caps(bprm);
 
+	if (!file_caps_enabled)
+		return 0;
+
 	if (bprm->file->f_vfsmnt->mnt_flags & MNT_NOSUID)
 		return 0;
 
 	dentry = dget(bprm->file->f_dentry);
-	inode = dentry->d_inode;
-	if (!inode->i_op || !inode->i_op->getxattr)
-		goto out;
 
-	rc = inode->i_op->getxattr(dentry, XATTR_NAME_CAPS, &vcaps,
-				   XATTR_CAPS_SZ);
-	if (rc == -ENODATA || rc == -EOPNOTSUPP) {
-		/* no data, that's ok */
-		rc = 0;
+	rc = get_vfs_caps_from_disk(dentry, &vcaps);
+	if (rc < 0) {
+		if (rc == -EINVAL)
+			printk(KERN_NOTICE "%s: get_vfs_caps_from_disk returned %d for %s\n",
+				__func__, rc, bprm->filename);
+		else if (rc == -ENODATA)
+			rc = 0;
 		goto out;
 	}
-	if (rc < 0)
-		goto out;
 
-	rc = cap_from_disk(&vcaps, bprm, rc);
+	rc = bprm_caps_from_vfs_caps(&vcaps, bprm, effective);
 	if (rc == -EINVAL)
 		printk(KERN_NOTICE "%s: cap_from_disk returned %d for %s\n",
 		       __func__, rc, bprm->filename);
@@ -323,18 +413,57 @@ int cap_inode_killpriv(struct dentry *dentry)
 	return 0;
 }
 
-static inline int get_file_caps(struct linux_binprm *bprm)
+int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps)
+{
+	memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
+ 	return -ENODATA;
+}
+
+static inline int get_file_caps(struct linux_binprm *bprm, bool *effective)
 {
 	bprm_clear_caps(bprm);
 	return 0;
 }
 #endif
 
-int cap_bprm_set_security (struct linux_binprm *bprm)
+/*
+ * Determine whether a exec'ing process's new permitted capabilities should be
+ * limited to just what it already has.
+ *
+ * This prevents processes that are being ptraced from gaining access to
+ * CAP_SETPCAP, unless the process they're tracing already has it, and the
+ * binary they're executing has filecaps that elevate it.
+ *
+ *  Returns 1 if they should be limited, 0 if they are not.
+ */
+static inline int cap_limit_ptraced_target(void)
+{
+#ifndef CONFIG_SECURITY_FILE_CAPABILITIES
+	if (capable(CAP_SETPCAP))
+		return 0;
+#endif
+	return 1;
+}
+
+/**
+ * cap_bprm_set_creds - Set up the proposed credentials for execve().
+ * @bprm: The execution parameters, including the proposed creds
+ *
+ * Set up the proposed credentials for a new execution context being
+ * constructed by execve().  The proposed creds in @bprm->cred is altered,
+ * which won't take effect immediately.  Returns 0 if successful, -ve on error.
+ */
+int cap_bprm_set_creds(struct linux_binprm *bprm)
 {
+	const struct cred *old = current_cred();
+	struct cred *new = bprm->cred;
+	bool effective;
 	int ret;
 
-	ret = get_file_caps(bprm);
+	effective = false;
+	ret = get_file_caps(bprm, &effective);
+	if (ret < 0)
+		return ret;
 
 	if (!issecure(SECURE_NOROOT)) {
 		/*
@@ -342,75 +471,113 @@ int cap_bprm_set_security (struct linux_binprm *bprm)
 		 * executables under compatibility mode, we override the
 		 * capability sets for the file.
 		 *
-		 * If only the real uid is 0, we do not set the effective
-		 * bit.
+		 * If only the real uid is 0, we do not set the effective bit.
 		 */
-		if (bprm->e_uid == 0 || current->uid == 0) {
+		if (new->euid == 0 || new->uid == 0) {
 			/* pP' = (cap_bset & ~0) | (pI & ~0) */
-			bprm->cap_post_exec_permitted = cap_combine(
-				current->cap_bset, current->cap_inheritable
-				);
-			bprm->cap_effective = (bprm->e_uid == 0);
-			ret = 0;
+			new->cap_permitted = cap_combine(old->cap_bset,
+							 old->cap_inheritable);
 		}
+		if (new->euid == 0)
+			effective = true;
 	}
 
-	return ret;
-}
-
-void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
-{
-	if (bprm->e_uid != current->uid || bprm->e_gid != current->gid ||
-	    !cap_issubset(bprm->cap_post_exec_permitted,
-			  current->cap_permitted)) {
-		set_dumpable(current->mm, suid_dumpable);
-		current->pdeath_signal = 0;
-
-		if (unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
-			if (!capable(CAP_SETUID)) {
-				bprm->e_uid = current->uid;
-				bprm->e_gid = current->gid;
-			}
-			if (cap_limit_ptraced_target()) {
-				bprm->cap_post_exec_permitted = cap_intersect(
-					bprm->cap_post_exec_permitted,
-					current->cap_permitted);
-			}
+	/* Don't let someone trace a set[ug]id/setpcap binary with the revised
+	 * credentials unless they have the appropriate permit
+	 */
+	if ((new->euid != old->uid ||
+	     new->egid != old->gid ||
+	     !cap_issubset(new->cap_permitted, old->cap_permitted)) &&
+	    bprm->unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
+		/* downgrade; they get no more than they had, and maybe less */
+		if (!capable(CAP_SETUID)) {
+			new->euid = new->uid;
+			new->egid = new->gid;
 		}
+		if (cap_limit_ptraced_target())
+			new->cap_permitted = cap_intersect(new->cap_permitted,
+							   old->cap_permitted);
 	}
 
-	current->suid = current->euid = current->fsuid = bprm->e_uid;
-	current->sgid = current->egid = current->fsgid = bprm->e_gid;
+	new->suid = new->fsuid = new->euid;
+	new->sgid = new->fsgid = new->egid;
 
-	/* For init, we want to retain the capabilities set
-	 * in the init_task struct. Thus we skip the usual
-	 * capability rules */
+	/* For init, we want to retain the capabilities set in the initial
+	 * task.  Thus we skip the usual capability rules
+	 */
 	if (!is_global_init(current)) {
-		current->cap_permitted = bprm->cap_post_exec_permitted;
-		if (bprm->cap_effective)
-			current->cap_effective = bprm->cap_post_exec_permitted;
+		if (effective)
+			new->cap_effective = new->cap_permitted;
 		else
-			cap_clear(current->cap_effective);
+			cap_clear(new->cap_effective);
 	}
+	bprm->cap_effective = effective;
 
-	/* AUD: Audit candidate if current->cap_effective is set */
+	/*
+	 * Audit candidate if current->cap_effective is set
+	 *
+	 * We do not bother to audit if 3 things are true:
+	 *   1) cap_effective has all caps
+	 *   2) we are root
+	 *   3) root is supposed to have all caps (SECURE_NOROOT)
+	 * Since this is just a normal root execing a process.
+	 *
+	 * Number 1 above might fail if you don't have a full bset, but I think
+	 * that is interesting information to audit.
+	 */
+	if (!cap_isclear(new->cap_effective)) {
+		if (!cap_issubset(CAP_FULL_SET, new->cap_effective) ||
+		    new->euid != 0 || new->uid != 0 ||
+		    issecure(SECURE_NOROOT)) {
+			ret = audit_log_bprm_fcaps(bprm, new, old);
+			if (ret < 0)
+				return ret;
+		}
+	}
 
-	current->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+	new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+	return 0;
 }
 
-int cap_bprm_secureexec (struct linux_binprm *bprm)
+/**
+ * cap_bprm_secureexec - Determine whether a secure execution is required
+ * @bprm: The execution parameters
+ *
+ * Determine whether a secure execution is required, return 1 if it is, and 0
+ * if it is not.
+ *
+ * The credentials have been committed by this point, and so are no longer
+ * available through @bprm->cred.
+ */
+int cap_bprm_secureexec(struct linux_binprm *bprm)
 {
-	if (current->uid != 0) {
+	const struct cred *cred = current_cred();
+
+	if (cred->uid != 0) {
 		if (bprm->cap_effective)
 			return 1;
-		if (!cap_isclear(bprm->cap_post_exec_permitted))
+		if (!cap_isclear(cred->cap_permitted))
 			return 1;
 	}
 
-	return (current->euid != current->uid ||
-		current->egid != current->gid);
+	return (cred->euid != cred->uid ||
+		cred->egid != cred->gid);
 }
 
+/**
+ * cap_inode_setxattr - Determine whether an xattr may be altered
+ * @dentry: The inode/dentry being altered
+ * @name: The name of the xattr to be changed
+ * @value: The value that the xattr will be changed to
+ * @size: The size of value
+ * @flags: The replacement flag
+ *
+ * Determine whether an xattr may be altered or set on an inode, returning 0 if
+ * permission is granted, -ve if denied.
+ *
+ * This is used to make sure security xattrs don't get updated or set by those
+ * who aren't privileged to do so.
+ */
 int cap_inode_setxattr(struct dentry *dentry, const char *name,
 		       const void *value, size_t size, int flags)
 {
@@ -418,28 +585,42 @@ int cap_inode_setxattr(struct dentry *dentry, const char *name,
 		if (!capable(CAP_SETFCAP))
 			return -EPERM;
 		return 0;
-	} else if (!strncmp(name, XATTR_SECURITY_PREFIX,
+	}
+
+	if (!strncmp(name, XATTR_SECURITY_PREFIX,
 		     sizeof(XATTR_SECURITY_PREFIX) - 1)  &&
 	    !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	return 0;
 }
 
+/**
+ * cap_inode_removexattr - Determine whether an xattr may be removed
+ * @dentry: The inode/dentry being altered
+ * @name: The name of the xattr to be changed
+ *
+ * Determine whether an xattr may be removed from an inode, returning 0 if
+ * permission is granted, -ve if denied.
+ *
+ * This is used to make sure security xattrs don't get removed by those who
+ * aren't privileged to remove them.
+ */
 int cap_inode_removexattr(struct dentry *dentry, const char *name)
 {
 	if (!strcmp(name, XATTR_NAME_CAPS)) {
 		if (!capable(CAP_SETFCAP))
 			return -EPERM;
 		return 0;
-	} else if (!strncmp(name, XATTR_SECURITY_PREFIX,
+	}
+
+	if (!strncmp(name, XATTR_SECURITY_PREFIX,
 		     sizeof(XATTR_SECURITY_PREFIX) - 1)  &&
 	    !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	return 0;
 }
 
-/* moved from kernel/sys.c. */
-/* 
+/*
  * cap_emulate_setxuid() fixes the effective / permitted capabilities of
  * a process after a call to setuid, setreuid, or setresuid.
  *
@@ -453,10 +634,10 @@ int cap_inode_removexattr(struct dentry *dentry, const char *name)
  *  3) When set*uiding _from_ euid != 0 _to_ euid == 0, the effective
  *  capabilities are set to the permitted capabilities.
  *
- *  fsuid is handled elsewhere. fsuid == 0 and {r,e,s}uid!= 0 should 
+ *  fsuid is handled elsewhere. fsuid == 0 and {r,e,s}uid!= 0 should
  *  never happen.
  *
- *  -astor 
+ *  -astor
  *
  * cevans - New behaviour, Oct '99
  * A process may, via prctl(), elect to keep its capabilities when it
@@ -468,61 +649,60 @@ int cap_inode_removexattr(struct dentry *dentry, const char *name)
  * files..
  * Thanks to Olaf Kirch and Peter Benie for spotting this.
  */
-static inline void cap_emulate_setxuid (int old_ruid, int old_euid,
-					int old_suid)
+static inline void cap_emulate_setxuid(struct cred *new, const struct cred *old)
 {
-	if ((old_ruid == 0 || old_euid == 0 || old_suid == 0) &&
-	    (current->uid != 0 && current->euid != 0 && current->suid != 0) &&
+	if ((old->uid == 0 || old->euid == 0 || old->suid == 0) &&
+	    (new->uid != 0 && new->euid != 0 && new->suid != 0) &&
 	    !issecure(SECURE_KEEP_CAPS)) {
-		cap_clear (current->cap_permitted);
-		cap_clear (current->cap_effective);
-	}
-	if (old_euid == 0 && current->euid != 0) {
-		cap_clear (current->cap_effective);
-	}
-	if (old_euid != 0 && current->euid == 0) {
-		current->cap_effective = current->cap_permitted;
+		cap_clear(new->cap_permitted);
+		cap_clear(new->cap_effective);
 	}
+	if (old->euid == 0 && new->euid != 0)
+		cap_clear(new->cap_effective);
+	if (old->euid != 0 && new->euid == 0)
+		new->cap_effective = new->cap_permitted;
 }
 
-int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid,
-			  int flags)
+/**
+ * cap_task_fix_setuid - Fix up the results of setuid() call
+ * @new: The proposed credentials
+ * @old: The current task's current credentials
+ * @flags: Indications of what has changed
+ *
+ * Fix up the results of setuid() call before the credential changes are
+ * actually applied, returning 0 to grant the changes, -ve to deny them.
+ */
+int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags)
 {
 	switch (flags) {
 	case LSM_SETID_RE:
 	case LSM_SETID_ID:
 	case LSM_SETID_RES:
-		/* Copied from kernel/sys.c:setreuid/setuid/setresuid. */
-		if (!issecure (SECURE_NO_SETUID_FIXUP)) {
-			cap_emulate_setxuid (old_ruid, old_euid, old_suid);
-		}
+		/* juggle the capabilities to follow [RES]UID changes unless
+		 * otherwise suppressed */
+		if (!issecure(SECURE_NO_SETUID_FIXUP))
+			cap_emulate_setxuid(new, old);
 		break;
-	case LSM_SETID_FS:
-		{
-			uid_t old_fsuid = old_ruid;
 
-			/* Copied from kernel/sys.c:setfsuid. */
-
-			/*
-			 * FIXME - is fsuser used for all CAP_FS_MASK capabilities?
-			 *          if not, we might be a bit too harsh here.
-			 */
-
-			if (!issecure (SECURE_NO_SETUID_FIXUP)) {
-				if (old_fsuid == 0 && current->fsuid != 0) {
-					current->cap_effective =
-						cap_drop_fs_set(
-						    current->cap_effective);
-				}
-				if (old_fsuid != 0 && current->fsuid == 0) {
-					current->cap_effective =
-						cap_raise_fs_set(
-						    current->cap_effective,
-						    current->cap_permitted);
-				}
-			}
-			break;
+	case LSM_SETID_FS:
+		/* juggle the capabilties to follow FSUID changes, unless
+		 * otherwise suppressed
+		 *
+		 * FIXME - is fsuser used for all CAP_FS_MASK capabilities?
+		 *          if not, we might be a bit too harsh here.
+		 */
+		if (!issecure(SECURE_NO_SETUID_FIXUP)) {
+			if (old->fsuid == 0 && new->fsuid != 0)
+				new->cap_effective =
+					cap_drop_fs_set(new->cap_effective);
+
+			if (old->fsuid != 0 && new->fsuid == 0)
+				new->cap_effective =
+					cap_raise_fs_set(new->cap_effective,
+							 new->cap_permitted);
 		}
+		break;
+
 	default:
 		return -EINVAL;
 	}
@@ -543,42 +723,71 @@ int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid,
  */
 static int cap_safe_nice(struct task_struct *p)
 {
-	if (!cap_issubset(p->cap_permitted, current->cap_permitted) &&
-	    !capable(CAP_SYS_NICE))
+	int is_subset;
+
+	rcu_read_lock();
+	is_subset = cap_issubset(__task_cred(p)->cap_permitted,
+				 current_cred()->cap_permitted);
+	rcu_read_unlock();
+
+	if (!is_subset && !capable(CAP_SYS_NICE))
 		return -EPERM;
 	return 0;
 }
 
-int cap_task_setscheduler (struct task_struct *p, int policy,
+/**
+ * cap_task_setscheduler - Detemine if scheduler policy change is permitted
+ * @p: The task to affect
+ * @policy: The policy to effect
+ * @lp: The parameters to the scheduling policy
+ *
+ * Detemine if the requested scheduler policy change is permitted for the
+ * specified task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setscheduler(struct task_struct *p, int policy,
 			   struct sched_param *lp)
 {
 	return cap_safe_nice(p);
 }
 
-int cap_task_setioprio (struct task_struct *p, int ioprio)
+/**
+ * cap_task_ioprio - Detemine if I/O priority change is permitted
+ * @p: The task to affect
+ * @ioprio: The I/O priority to set
+ *
+ * Detemine if the requested I/O priority change is permitted for the specified
+ * task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setioprio(struct task_struct *p, int ioprio)
 {
 	return cap_safe_nice(p);
 }
 
-int cap_task_setnice (struct task_struct *p, int nice)
+/**
+ * cap_task_ioprio - Detemine if task priority change is permitted
+ * @p: The task to affect
+ * @nice: The nice value to set
+ *
+ * Detemine if the requested task priority change is permitted for the
+ * specified task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setnice(struct task_struct *p, int nice)
 {
 	return cap_safe_nice(p);
 }
 
 /*
- * called from kernel/sys.c for prctl(PR_CABSET_DROP)
- * done without task_capability_lock() because it introduces
- * no new races - i.e. only another task doing capget() on
- * this task could get inconsistent info.  There can be no
- * racing writer bc a task can only change its own caps.
+ * Implement PR_CAPBSET_DROP.  Attempt to remove the specified capability from
+ * the current task's bounding set.  Returns 0 on success, -ve on error.
  */
-static long cap_prctl_drop(unsigned long cap)
+static long cap_prctl_drop(struct cred *new, unsigned long cap)
 {
 	if (!capable(CAP_SETPCAP))
 		return -EPERM;
 	if (!cap_valid(cap))
 		return -EINVAL;
-	cap_lower(current->cap_bset, cap);
+
+	cap_lower(new->cap_bset, cap);
 	return 0;
 }
 
@@ -598,22 +807,42 @@ int cap_task_setnice (struct task_struct *p, int nice)
 }
 #endif
 
+/**
+ * cap_task_prctl - Implement process control functions for this security module
+ * @option: The process control function requested
+ * @arg2, @arg3, @arg4, @arg5: The argument data for this function
+ *
+ * Allow process control functions (sys_prctl()) to alter capabilities; may
+ * also deny access to other functions not otherwise implemented here.
+ *
+ * Returns 0 or +ve on success, -ENOSYS if this function is not implemented
+ * here, other -ve on error.  If -ENOSYS is returned, sys_prctl() and other LSM
+ * modules will consider performing the function.
+ */
 int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-		   unsigned long arg4, unsigned long arg5, long *rc_p)
+		   unsigned long arg4, unsigned long arg5)
 {
+	struct cred *new;
 	long error = 0;
 
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
+
 	switch (option) {
 	case PR_CAPBSET_READ:
+		error = -EINVAL;
 		if (!cap_valid(arg2))
-			error = -EINVAL;
-		else
-			error = !!cap_raised(current->cap_bset, arg2);
-		break;
+			goto error;
+		error = !!cap_raised(new->cap_bset, arg2);
+		goto no_change;
+
 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 	case PR_CAPBSET_DROP:
-		error = cap_prctl_drop(arg2);
-		break;
+		error = cap_prctl_drop(new, arg2);
+		if (error < 0)
+			goto error;
+		goto changed;
 
 	/*
 	 * The next four prctl's remain to assist with transitioning a
@@ -635,12 +864,12 @@ int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 	 * capability-based-privilege environment.
 	 */
 	case PR_SET_SECUREBITS:
-		if ((((current->securebits & SECURE_ALL_LOCKS) >> 1)
-		     & (current->securebits ^ arg2))                  /*[1]*/
-		    || ((current->securebits & SECURE_ALL_LOCKS
-			 & ~arg2))                                    /*[2]*/
-		    || (arg2 & ~(SECURE_ALL_LOCKS | SECURE_ALL_BITS)) /*[3]*/
-		    || (cap_capable(current, CAP_SETPCAP) != 0)) {    /*[4]*/
+		error = -EPERM;
+		if ((((new->securebits & SECURE_ALL_LOCKS) >> 1)
+		     & (new->securebits ^ arg2))			/*[1]*/
+		    || ((new->securebits & SECURE_ALL_LOCKS & ~arg2))	/*[2]*/
+		    || (arg2 & ~(SECURE_ALL_LOCKS | SECURE_ALL_BITS))	/*[3]*/
+		    || (cap_capable(current, CAP_SETPCAP, SECURITY_CAP_AUDIT) != 0) /*[4]*/
 			/*
 			 * [1] no changing of bits that are locked
 			 * [2] no unlocking of locks
@@ -648,65 +877,80 @@ int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 			 * [4] doing anything requires privilege (go read about
 			 *     the "sendmail capabilities bug")
 			 */
-			error = -EPERM;  /* cannot change a locked bit */
-		} else {
-			current->securebits = arg2;
-		}
-		break;
+		    )
+			/* cannot change a locked bit */
+			goto error;
+		new->securebits = arg2;
+		goto changed;
+
 	case PR_GET_SECUREBITS:
-		error = current->securebits;
-		break;
+		error = new->securebits;
+		goto no_change;
 
 #endif /* def CONFIG_SECURITY_FILE_CAPABILITIES */
 
 	case PR_GET_KEEPCAPS:
 		if (issecure(SECURE_KEEP_CAPS))
 			error = 1;
-		break;
+		goto no_change;
+
 	case PR_SET_KEEPCAPS:
+		error = -EINVAL;
 		if (arg2 > 1) /* Note, we rely on arg2 being unsigned here */
-			error = -EINVAL;
-		else if (issecure(SECURE_KEEP_CAPS_LOCKED))
-			error = -EPERM;
-		else if (arg2)
-			current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
+			goto error;
+		error = -EPERM;
+		if (issecure(SECURE_KEEP_CAPS_LOCKED))
+			goto error;
+		if (arg2)
+			new->securebits |= issecure_mask(SECURE_KEEP_CAPS);
 		else
-			current->securebits &=
-				~issecure_mask(SECURE_KEEP_CAPS);
-		break;
+			new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+		goto changed;
 
 	default:
 		/* No functionality available - continue with default */
-		return 0;
+		error = -ENOSYS;
+		goto error;
 	}
 
 	/* Functionality provided */
-	*rc_p = error;
-	return 1;
-}
+changed:
+	return commit_creds(new);
 
-void cap_task_reparent_to_init (struct task_struct *p)
-{
-	cap_set_init_eff(p->cap_effective);
-	cap_clear(p->cap_inheritable);
-	cap_set_full(p->cap_permitted);
-	p->securebits = SECUREBITS_DEFAULT;
-	return;
+no_change:
+	error = 0;
+error:
+	abort_creds(new);
+	return error;
 }
 
-int cap_syslog (int type)
+/**
+ * cap_syslog - Determine whether syslog function is permitted
+ * @type: Function requested
+ *
+ * Determine whether the current process is permitted to use a particular
+ * syslog function, returning 0 if permission is granted, -ve if not.
+ */
+int cap_syslog(int type)
 {
 	if ((type != 3 && type != 10) && !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	return 0;
 }
 
+/**
+ * cap_vm_enough_memory - Determine whether a new virtual mapping is permitted
+ * @mm: The VM space in which the new mapping is to be made
+ * @pages: The size of the mapping
+ *
+ * Determine whether the allocation of a new virtual mapping by the current
+ * task is permitted, returning 0 if permission is granted, -ve if not.
+ */
 int cap_vm_enough_memory(struct mm_struct *mm, long pages)
 {
 	int cap_sys_admin = 0;
 
-	if (cap_capable(current, CAP_SYS_ADMIN) == 0)
+	if (cap_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT) == 0)
 		cap_sys_admin = 1;
 	return __vm_enough_memory(mm, pages, cap_sys_admin);
 }
-
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 239098f0fd7..81932abefe7 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -12,8 +12,8 @@
 #ifndef _INTERNAL_H
 #define _INTERNAL_H
 
+#include <linux/sched.h>
 #include <linux/key-type.h>
-#include <linux/key-ui.h>
 
 static inline __attribute__((format(printf, 1, 2)))
 void no_printk(const char *fmt, ...)
@@ -26,7 +26,7 @@ void no_printk(const char *fmt, ...)
 #define kleave(FMT, ...) \
 	printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
 #define kdebug(FMT, ...) \
-	printk(KERN_DEBUG "xxx" FMT"yyy\n", ##__VA_ARGS__)
+	printk(KERN_DEBUG "   "FMT"\n", ##__VA_ARGS__)
 #else
 #define kenter(FMT, ...) \
 	no_printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
@@ -82,6 +82,9 @@ extern struct mutex key_construction_mutex;
 extern wait_queue_head_t request_key_conswq;
 
 
+extern struct key_type *key_type_lookup(const char *type);
+extern void key_type_put(struct key_type *ktype);
+
 extern int __key_link(struct key *keyring, struct key *key);
 
 extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
@@ -95,7 +98,7 @@ extern struct key *keyring_search_instkey(struct key *keyring,
 typedef int (*key_match_func_t)(const struct key *, const void *);
 
 extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
-				    struct task_struct *tsk,
+				    const struct cred *cred,
 				    struct key_type *type,
 				    const void *description,
 				    key_match_func_t match);
@@ -103,13 +106,13 @@ extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
 extern key_ref_t search_process_keyrings(struct key_type *type,
 					 const void *description,
 					 key_match_func_t match,
-					 struct task_struct *tsk);
+					 const struct cred *cred);
 
 extern struct key *find_keyring_by_name(const char *name, bool skip_perm_check);
 
-extern int install_user_keyrings(struct task_struct *tsk);
-extern int install_thread_keyring(struct task_struct *tsk);
-extern int install_process_keyring(struct task_struct *tsk);
+extern int install_user_keyrings(void);
+extern int install_thread_keyring_to_cred(struct cred *);
+extern int install_process_keyring_to_cred(struct cred *);
 
 extern struct key *request_key_and_link(struct key_type *type,
 					const char *description,
@@ -119,12 +122,39 @@ extern struct key *request_key_and_link(struct key_type *type,
 					struct key *dest_keyring,
 					unsigned long flags);
 
+extern key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
+				 key_perm_t perm);
+
+extern long join_session_keyring(const char *name);
+
+/*
+ * check to see whether permission is granted to use a key in the desired way
+ */
+extern int key_task_permission(const key_ref_t key_ref,
+			       const struct cred *cred,
+			       key_perm_t perm);
+
+static inline int key_permission(const key_ref_t key_ref, key_perm_t perm)
+{
+	return key_task_permission(key_ref, current_cred(), perm);
+}
+
+/* required permissions */
+#define	KEY_VIEW	0x01	/* require permission to view attributes */
+#define	KEY_READ	0x02	/* require permission to read content */
+#define	KEY_WRITE	0x04	/* require permission to update / modify */
+#define	KEY_SEARCH	0x08	/* require permission to search (keyring) or find (key) */
+#define	KEY_LINK	0x10	/* require permission to link */
+#define	KEY_SETATTR	0x20	/* require permission to change attributes */
+#define	KEY_ALL		0x3f	/* all the above permissions */
+
 /*
  * request_key authorisation
  */
 struct request_key_auth {
 	struct key		*target_key;
-	struct task_struct	*context;
+	struct key		*dest_keyring;
+	const struct cred	*cred;
 	void			*callout_info;
 	size_t			callout_len;
 	pid_t			pid;
@@ -133,7 +163,8 @@ struct request_key_auth {
 extern struct key_type key_type_request_key_auth;
 extern struct key *request_key_auth_new(struct key *target,
 					const void *callout_info,
-					size_t callout_len);
+					size_t callout_len,
+					struct key *dest_keyring);
 
 extern struct key *key_get_instantiation_authkey(key_serial_t target_id);
 
diff --git a/security/keys/key.c b/security/keys/key.c
index 14948cf83ef..f76c8a546fd 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -218,7 +218,7 @@ serial_exists:
  *   instantiate the key or discard it before returning
  */
 struct key *key_alloc(struct key_type *type, const char *desc,
-		      uid_t uid, gid_t gid, struct task_struct *ctx,
+		      uid_t uid, gid_t gid, const struct cred *cred,
 		      key_perm_t perm, unsigned long flags)
 {
 	struct key_user *user = NULL;
@@ -294,7 +294,7 @@ struct key *key_alloc(struct key_type *type, const char *desc,
 #endif
 
 	/* let the security module know about the key */
-	ret = security_key_alloc(key, ctx, flags);
+	ret = security_key_alloc(key, cred, flags);
 	if (ret < 0)
 		goto security_error;
 
@@ -391,7 +391,7 @@ static int __key_instantiate_and_link(struct key *key,
 				      const void *data,
 				      size_t datalen,
 				      struct key *keyring,
-				      struct key *instkey)
+				      struct key *authkey)
 {
 	int ret, awaken;
 
@@ -421,8 +421,8 @@ static int __key_instantiate_and_link(struct key *key,
 				ret = __key_link(keyring, key);
 
 			/* disable the authorisation key */
-			if (instkey)
-				key_revoke(instkey);
+			if (authkey)
+				key_revoke(authkey);
 		}
 	}
 
@@ -444,14 +444,14 @@ int key_instantiate_and_link(struct key *key,
 			     const void *data,
 			     size_t datalen,
 			     struct key *keyring,
-			     struct key *instkey)
+			     struct key *authkey)
 {
 	int ret;
 
 	if (keyring)
 		down_write(&keyring->sem);
 
-	ret = __key_instantiate_and_link(key, data, datalen, keyring, instkey);
+	ret = __key_instantiate_and_link(key, data, datalen, keyring, authkey);
 
 	if (keyring)
 		up_write(&keyring->sem);
@@ -469,7 +469,7 @@ EXPORT_SYMBOL(key_instantiate_and_link);
 int key_negate_and_link(struct key *key,
 			unsigned timeout,
 			struct key *keyring,
-			struct key *instkey)
+			struct key *authkey)
 {
 	struct timespec now;
 	int ret, awaken;
@@ -504,8 +504,8 @@ int key_negate_and_link(struct key *key,
 			ret = __key_link(keyring, key);
 
 		/* disable the authorisation key */
-		if (instkey)
-			key_revoke(instkey);
+		if (authkey)
+			key_revoke(authkey);
 	}
 
 	mutex_unlock(&key_construction_mutex);
@@ -743,6 +743,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
 			       key_perm_t perm,
 			       unsigned long flags)
 {
+	const struct cred *cred = current_cred();
 	struct key_type *ktype;
 	struct key *keyring, *key = NULL;
 	key_ref_t key_ref;
@@ -802,8 +803,8 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
 	}
 
 	/* allocate a new key */
-	key = key_alloc(ktype, description, current->fsuid, current->fsgid,
-			current, perm, flags);
+	key = key_alloc(ktype, description, cred->fsuid, cred->fsgid, cred,
+			perm, flags);
 	if (IS_ERR(key)) {
 		key_ref = ERR_CAST(key);
 		goto error_3;
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index acc9c89e40a..7c72baa02f2 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -103,7 +103,7 @@ asmlinkage long sys_add_key(const char __user *_type,
 	}
 
 	/* find the target keyring (which must be writable) */
-	keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+	keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
 	if (IS_ERR(keyring_ref)) {
 		ret = PTR_ERR(keyring_ref);
 		goto error3;
@@ -185,7 +185,7 @@ asmlinkage long sys_request_key(const char __user *_type,
 	/* get the destination keyring if specified */
 	dest_ref = NULL;
 	if (destringid) {
-		dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+		dest_ref = lookup_user_key(destringid, 1, 0, KEY_WRITE);
 		if (IS_ERR(dest_ref)) {
 			ret = PTR_ERR(dest_ref);
 			goto error3;
@@ -235,7 +235,7 @@ long keyctl_get_keyring_ID(key_serial_t id, int create)
 	key_ref_t key_ref;
 	long ret;
 
-	key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH);
+	key_ref = lookup_user_key(id, create, 0, KEY_SEARCH);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error;
@@ -308,7 +308,7 @@ long keyctl_update_key(key_serial_t id,
 	}
 
 	/* find the target key (which must be writable) */
-	key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+	key_ref = lookup_user_key(id, 0, 0, KEY_WRITE);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error2;
@@ -336,7 +336,7 @@ long keyctl_revoke_key(key_serial_t id)
 	key_ref_t key_ref;
 	long ret;
 
-	key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+	key_ref = lookup_user_key(id, 0, 0, KEY_WRITE);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error;
@@ -362,7 +362,7 @@ long keyctl_keyring_clear(key_serial_t ringid)
 	key_ref_t keyring_ref;
 	long ret;
 
-	keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+	keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
 	if (IS_ERR(keyring_ref)) {
 		ret = PTR_ERR(keyring_ref);
 		goto error;
@@ -388,13 +388,13 @@ long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)
 	key_ref_t keyring_ref, key_ref;
 	long ret;
 
-	keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+	keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
 	if (IS_ERR(keyring_ref)) {
 		ret = PTR_ERR(keyring_ref);
 		goto error;
 	}
 
-	key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK);
+	key_ref = lookup_user_key(id, 1, 0, KEY_LINK);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error2;
@@ -422,13 +422,13 @@ long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid)
 	key_ref_t keyring_ref, key_ref;
 	long ret;
 
-	keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE);
+	keyring_ref = lookup_user_key(ringid, 0, 0, KEY_WRITE);
 	if (IS_ERR(keyring_ref)) {
 		ret = PTR_ERR(keyring_ref);
 		goto error;
 	}
 
-	key_ref = lookup_user_key(NULL, id, 0, 0, 0);
+	key_ref = lookup_user_key(id, 0, 0, 0);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error2;
@@ -464,7 +464,7 @@ long keyctl_describe_key(key_serial_t keyid,
 	char *tmpbuf;
 	long ret;
 
-	key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
+	key_ref = lookup_user_key(keyid, 0, 1, KEY_VIEW);
 	if (IS_ERR(key_ref)) {
 		/* viewing a key under construction is permitted if we have the
 		 * authorisation token handy */
@@ -472,7 +472,7 @@ long keyctl_describe_key(key_serial_t keyid,
 			instkey = key_get_instantiation_authkey(keyid);
 			if (!IS_ERR(instkey)) {
 				key_put(instkey);
-				key_ref = lookup_user_key(NULL, keyid,
+				key_ref = lookup_user_key(keyid,
 							  0, 1, 0);
 				if (!IS_ERR(key_ref))
 					goto okay;
@@ -557,7 +557,7 @@ long keyctl_keyring_search(key_serial_t ringid,
 	}
 
 	/* get the keyring at which to begin the search */
-	keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH);
+	keyring_ref = lookup_user_key(ringid, 0, 0, KEY_SEARCH);
 	if (IS_ERR(keyring_ref)) {
 		ret = PTR_ERR(keyring_ref);
 		goto error2;
@@ -566,7 +566,7 @@ long keyctl_keyring_search(key_serial_t ringid,
 	/* get the destination keyring if specified */
 	dest_ref = NULL;
 	if (destringid) {
-		dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+		dest_ref = lookup_user_key(destringid, 1, 0, KEY_WRITE);
 		if (IS_ERR(dest_ref)) {
 			ret = PTR_ERR(dest_ref);
 			goto error3;
@@ -636,7 +636,7 @@ long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
 	long ret;
 
 	/* find the key first */
-	key_ref = lookup_user_key(NULL, keyid, 0, 0, 0);
+	key_ref = lookup_user_key(keyid, 0, 0, 0);
 	if (IS_ERR(key_ref)) {
 		ret = -ENOKEY;
 		goto error;
@@ -699,7 +699,7 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
 	if (uid == (uid_t) -1 && gid == (gid_t) -1)
 		goto error;
 
-	key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+	key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error;
@@ -804,7 +804,7 @@ long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
 	if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL))
 		goto error;
 
-	key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+	key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error;
@@ -817,7 +817,7 @@ long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
 	down_write(&key->sem);
 
 	/* if we're not the sysadmin, we can only change a key that we own */
-	if (capable(CAP_SYS_ADMIN) || key->uid == current->fsuid) {
+	if (capable(CAP_SYS_ADMIN) || key->uid == current_fsuid()) {
 		key->perm = perm;
 		ret = 0;
 	}
@@ -829,6 +829,60 @@ error:
 
 } /* end keyctl_setperm_key() */
 
+/*
+ * get the destination keyring for instantiation
+ */
+static long get_instantiation_keyring(key_serial_t ringid,
+				      struct request_key_auth *rka,
+				      struct key **_dest_keyring)
+{
+	key_ref_t dkref;
+
+	/* just return a NULL pointer if we weren't asked to make a link */
+	if (ringid == 0) {
+		*_dest_keyring = NULL;
+		return 0;
+	}
+
+	/* if a specific keyring is nominated by ID, then use that */
+	if (ringid > 0) {
+		dkref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
+		if (IS_ERR(dkref))
+			return PTR_ERR(dkref);
+		*_dest_keyring = key_ref_to_ptr(dkref);
+		return 0;
+	}
+
+	if (ringid == KEY_SPEC_REQKEY_AUTH_KEY)
+		return -EINVAL;
+
+	/* otherwise specify the destination keyring recorded in the
+	 * authorisation key (any KEY_SPEC_*_KEYRING) */
+	if (ringid >= KEY_SPEC_REQUESTOR_KEYRING) {
+		*_dest_keyring = rka->dest_keyring;
+		return 0;
+	}
+
+	return -ENOKEY;
+}
+
+/*
+ * change the request_key authorisation key on the current process
+ */
+static int keyctl_change_reqkey_auth(struct key *key)
+{
+	struct cred *new;
+
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
+
+	key_put(new->request_key_auth);
+	new->request_key_auth = key_get(key);
+
+	return commit_creds(new);
+}
+
 /*****************************************************************************/
 /*
  * instantiate the key with the specified payload, and, if one is given, link
@@ -839,13 +893,15 @@ long keyctl_instantiate_key(key_serial_t id,
 			    size_t plen,
 			    key_serial_t ringid)
 {
+	const struct cred *cred = current_cred();
 	struct request_key_auth *rka;
-	struct key *instkey;
-	key_ref_t keyring_ref;
+	struct key *instkey, *dest_keyring;
 	void *payload;
 	long ret;
 	bool vm = false;
 
+	kenter("%d,,%zu,%d", id, plen, ringid);
+
 	ret = -EINVAL;
 	if (plen > 1024 * 1024 - 1)
 		goto error;
@@ -853,7 +909,7 @@ long keyctl_instantiate_key(key_serial_t id,
 	/* the appropriate instantiation authorisation key must have been
 	 * assumed before calling this */
 	ret = -EPERM;
-	instkey = current->request_key_auth;
+	instkey = cred->request_key_auth;
 	if (!instkey)
 		goto error;
 
@@ -883,28 +939,20 @@ long keyctl_instantiate_key(key_serial_t id,
 
 	/* find the destination keyring amongst those belonging to the
 	 * requesting task */
-	keyring_ref = NULL;
-	if (ringid) {
-		keyring_ref = lookup_user_key(rka->context, ringid, 1, 0,
-					      KEY_WRITE);
-		if (IS_ERR(keyring_ref)) {
-			ret = PTR_ERR(keyring_ref);
-			goto error2;
-		}
-	}
+	ret = get_instantiation_keyring(ringid, rka, &dest_keyring);
+	if (ret < 0)
+		goto error2;
 
 	/* instantiate the key and link it into a keyring */
 	ret = key_instantiate_and_link(rka->target_key, payload, plen,
-				       key_ref_to_ptr(keyring_ref), instkey);
+				       dest_keyring, instkey);
 
-	key_ref_put(keyring_ref);
+	key_put(dest_keyring);
 
 	/* discard the assumed authority if it's just been disabled by
 	 * instantiation of the key */
-	if (ret == 0) {
-		key_put(current->request_key_auth);
-		current->request_key_auth = NULL;
-	}
+	if (ret == 0)
+		keyctl_change_reqkey_auth(NULL);
 
 error2:
 	if (!vm)
@@ -923,15 +971,17 @@ error:
  */
 long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
 {
+	const struct cred *cred = current_cred();
 	struct request_key_auth *rka;
-	struct key *instkey;
-	key_ref_t keyring_ref;
+	struct key *instkey, *dest_keyring;
 	long ret;
 
+	kenter("%d,%u,%d", id, timeout, ringid);
+
 	/* the appropriate instantiation authorisation key must have been
 	 * assumed before calling this */
 	ret = -EPERM;
-	instkey = current->request_key_auth;
+	instkey = cred->request_key_auth;
 	if (!instkey)
 		goto error;
 
@@ -941,27 +991,20 @@ long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
 
 	/* find the destination keyring if present (which must also be
 	 * writable) */
-	keyring_ref = NULL;
-	if (ringid) {
-		keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
-		if (IS_ERR(keyring_ref)) {
-			ret = PTR_ERR(keyring_ref);
-			goto error;
-		}
-	}
+	ret = get_instantiation_keyring(ringid, rka, &dest_keyring);
+	if (ret < 0)
+		goto error;
 
 	/* instantiate the key and link it into a keyring */
 	ret = key_negate_and_link(rka->target_key, timeout,
-				  key_ref_to_ptr(keyring_ref), instkey);
+				  dest_keyring, instkey);
 
-	key_ref_put(keyring_ref);
+	key_put(dest_keyring);
 
 	/* discard the assumed authority if it's just been disabled by
 	 * instantiation of the key */
-	if (ret == 0) {
-		key_put(current->request_key_auth);
-		current->request_key_auth = NULL;
-	}
+	if (ret == 0)
+		keyctl_change_reqkey_auth(NULL);
 
 error:
 	return ret;
@@ -975,35 +1018,56 @@ error:
  */
 long keyctl_set_reqkey_keyring(int reqkey_defl)
 {
-	int ret;
+	struct cred *new;
+	int ret, old_setting;
+
+	old_setting = current_cred_xxx(jit_keyring);
+
+	if (reqkey_defl == KEY_REQKEY_DEFL_NO_CHANGE)
+		return old_setting;
+
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
 
 	switch (reqkey_defl) {
 	case KEY_REQKEY_DEFL_THREAD_KEYRING:
-		ret = install_thread_keyring(current);
+		ret = install_thread_keyring_to_cred(new);
 		if (ret < 0)
-			return ret;
+			goto error;
 		goto set;
 
 	case KEY_REQKEY_DEFL_PROCESS_KEYRING:
-		ret = install_process_keyring(current);
-		if (ret < 0)
-			return ret;
+		ret = install_process_keyring_to_cred(new);
+		if (ret < 0) {
+			if (ret != -EEXIST)
+				goto error;
+			ret = 0;
+		}
+		goto set;
 
 	case KEY_REQKEY_DEFL_DEFAULT:
 	case KEY_REQKEY_DEFL_SESSION_KEYRING:
 	case KEY_REQKEY_DEFL_USER_KEYRING:
 	case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
-	set:
-		current->jit_keyring = reqkey_defl;
+	case KEY_REQKEY_DEFL_REQUESTOR_KEYRING:
+		goto set;
 
 	case KEY_REQKEY_DEFL_NO_CHANGE:
-		return current->jit_keyring;
-
 	case KEY_REQKEY_DEFL_GROUP_KEYRING:
 	default:
-		return -EINVAL;
+		ret = -EINVAL;
+		goto error;
 	}
 
+set:
+	new->jit_keyring = reqkey_defl;
+	commit_creds(new);
+	return old_setting;
+error:
+	abort_creds(new);
+	return -EINVAL;
+
 } /* end keyctl_set_reqkey_keyring() */
 
 /*****************************************************************************/
@@ -1018,7 +1082,7 @@ long keyctl_set_timeout(key_serial_t id, unsigned timeout)
 	time_t expiry;
 	long ret;
 
-	key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+	key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
 	if (IS_ERR(key_ref)) {
 		ret = PTR_ERR(key_ref);
 		goto error;
@@ -1062,9 +1126,7 @@ long keyctl_assume_authority(key_serial_t id)
 
 	/* we divest ourselves of authority if given an ID of 0 */
 	if (id == 0) {
-		key_put(current->request_key_auth);
-		current->request_key_auth = NULL;
-		ret = 0;
+		ret = keyctl_change_reqkey_auth(NULL);
 		goto error;
 	}
 
@@ -1079,10 +1141,12 @@ long keyctl_assume_authority(key_serial_t id)
 		goto error;
 	}
 
-	key_put(current->request_key_auth);
-	current->request_key_auth = authkey;
-	ret = authkey->serial;
+	ret = keyctl_change_reqkey_auth(authkey);
+	if (ret < 0)
+		goto error;
+	key_put(authkey);
 
+	ret = authkey->serial;
 error:
 	return ret;
 
@@ -1105,7 +1169,7 @@ long keyctl_get_security(key_serial_t keyid,
 	char *context;
 	long ret;
 
-	key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
+	key_ref = lookup_user_key(keyid, 0, 1, KEY_VIEW);
 	if (IS_ERR(key_ref)) {
 		if (PTR_ERR(key_ref) != -EACCES)
 			return PTR_ERR(key_ref);
@@ -1117,7 +1181,7 @@ long keyctl_get_security(key_serial_t keyid,
 			return PTR_ERR(key_ref);
 		key_put(instkey);
 
-		key_ref = lookup_user_key(NULL, keyid, 0, 1, 0);
+		key_ref = lookup_user_key(keyid, 0, 1, 0);
 		if (IS_ERR(key_ref))
 			return PTR_ERR(key_ref);
 	}
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index a9ab8affc09..ed851574d07 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -16,6 +16,7 @@
 #include <linux/security.h>
 #include <linux/seq_file.h>
 #include <linux/err.h>
+#include <keys/keyring-type.h>
 #include <asm/uaccess.h>
 #include "internal.h"
 
@@ -244,14 +245,14 @@ static long keyring_read(const struct key *keyring,
  * allocate a keyring and link into the destination keyring
  */
 struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
-			  struct task_struct *ctx, unsigned long flags,
+			  const struct cred *cred, unsigned long flags,
 			  struct key *dest)
 {
 	struct key *keyring;
 	int ret;
 
 	keyring = key_alloc(&key_type_keyring, description,
-			    uid, gid, ctx,
+			    uid, gid, cred,
 			    (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_ALL,
 			    flags);
 
@@ -280,7 +281,7 @@ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
  * - we propagate the possession attribute from the keyring ref to the key ref
  */
 key_ref_t keyring_search_aux(key_ref_t keyring_ref,
-			     struct task_struct *context,
+			     const struct cred *cred,
 			     struct key_type *type,
 			     const void *description,
 			     key_match_func_t match)
@@ -303,7 +304,7 @@ key_ref_t keyring_search_aux(key_ref_t keyring_ref,
 	key_check(keyring);
 
 	/* top keyring must have search permission to begin the search */
-        err = key_task_permission(keyring_ref, context, KEY_SEARCH);
+        err = key_task_permission(keyring_ref, cred, KEY_SEARCH);
 	if (err < 0) {
 		key_ref = ERR_PTR(err);
 		goto error;
@@ -376,7 +377,7 @@ descend:
 
 		/* key must have search permissions */
 		if (key_task_permission(make_key_ref(key, possessed),
-					context, KEY_SEARCH) < 0)
+					cred, KEY_SEARCH) < 0)
 			continue;
 
 		/* we set a different error code if we pass a negative key */
@@ -403,7 +404,7 @@ ascend:
 			continue;
 
 		if (key_task_permission(make_key_ref(key, possessed),
-					context, KEY_SEARCH) < 0)
+					cred, KEY_SEARCH) < 0)
 			continue;
 
 		/* stack the current position */
@@ -458,7 +459,7 @@ key_ref_t keyring_search(key_ref_t keyring,
 	if (!type->match)
 		return ERR_PTR(-ENOKEY);
 
-	return keyring_search_aux(keyring, current,
+	return keyring_search_aux(keyring, current->cred,
 				  type, description, type->match);
 
 } /* end keyring_search() */
diff --git a/security/keys/permission.c b/security/keys/permission.c
index 3b41f9b5253..5d9fc7b93f2 100644
--- a/security/keys/permission.c
+++ b/security/keys/permission.c
@@ -14,12 +14,19 @@
 #include "internal.h"
 
 /*****************************************************************************/
-/*
- * check to see whether permission is granted to use a key in the desired way,
- * but permit the security modules to override
+/**
+ * key_task_permission - Check a key can be used
+ * @key_ref: The key to check
+ * @cred: The credentials to use
+ * @perm: The permissions to check for
+ *
+ * Check to see whether permission is granted to use a key in the desired way,
+ * but permit the security modules to override.
+ *
+ * The caller must hold either a ref on cred or must hold the RCU readlock or a
+ * spinlock.
  */
-int key_task_permission(const key_ref_t key_ref,
-			struct task_struct *context,
+int key_task_permission(const key_ref_t key_ref, const struct cred *cred,
 			key_perm_t perm)
 {
 	struct key *key;
@@ -29,7 +36,7 @@ int key_task_permission(const key_ref_t key_ref,
 	key = key_ref_to_ptr(key_ref);
 
 	/* use the second 8-bits of permissions for keys the caller owns */
-	if (key->uid == context->fsuid) {
+	if (key->uid == cred->fsuid) {
 		kperm = key->perm >> 16;
 		goto use_these_perms;
 	}
@@ -37,15 +44,12 @@ int key_task_permission(const key_ref_t key_ref,
 	/* use the third 8-bits of permissions for keys the caller has a group
 	 * membership in common with */
 	if (key->gid != -1 && key->perm & KEY_GRP_ALL) {
-		if (key->gid == context->fsgid) {
+		if (key->gid == cred->fsgid) {
 			kperm = key->perm >> 8;
 			goto use_these_perms;
 		}
 
-		task_lock(context);
-		ret = groups_search(context->group_info, key->gid);
-		task_unlock(context);
-
+		ret = groups_search(cred->group_info, key->gid);
 		if (ret) {
 			kperm = key->perm >> 8;
 			goto use_these_perms;
@@ -56,6 +60,7 @@ int key_task_permission(const key_ref_t key_ref,
 	kperm = key->perm;
 
 use_these_perms:
+
 	/* use the top 8-bits of permissions for keys the caller possesses
 	 * - possessor permissions are additive with other permissions
 	 */
@@ -68,7 +73,7 @@ use_these_perms:
 		return -EACCES;
 
 	/* let LSM be the final arbiter */
-	return security_key_permission(key_ref, context, perm);
+	return security_key_permission(key_ref, cred, perm);
 
 } /* end key_task_permission() */
 
diff --git a/security/keys/proc.c b/security/keys/proc.c
index f619170da76..7f508def50e 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -136,8 +136,12 @@ static int proc_keys_show(struct seq_file *m, void *v)
 	int rc;
 
 	/* check whether the current task is allowed to view the key (assuming
-	 * non-possession) */
-	rc = key_task_permission(make_key_ref(key, 0), current, KEY_VIEW);
+	 * non-possession)
+	 * - the caller holds a spinlock, and thus the RCU read lock, making our
+	 *   access to __current_cred() safe
+	 */
+	rc = key_task_permission(make_key_ref(key, 0), current_cred(),
+				 KEY_VIEW);
 	if (rc < 0)
 		return 0;
 
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 45b240af6db..2f5d89e92b8 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -40,13 +40,17 @@ struct key_user root_key_user = {
 /*
  * install user and user session keyrings for a particular UID
  */
-int install_user_keyrings(struct task_struct *tsk)
+int install_user_keyrings(void)
 {
-	struct user_struct *user = tsk->user;
+	struct user_struct *user;
+	const struct cred *cred;
 	struct key *uid_keyring, *session_keyring;
 	char buf[20];
 	int ret;
 
+	cred = current_cred();
+	user = cred->user;
+
 	kenter("%p{%u}", user, user->uid);
 
 	if (user->uid_keyring) {
@@ -67,7 +71,7 @@ int install_user_keyrings(struct task_struct *tsk)
 		uid_keyring = find_keyring_by_name(buf, true);
 		if (IS_ERR(uid_keyring)) {
 			uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1,
-						    tsk, KEY_ALLOC_IN_QUOTA,
+						    cred, KEY_ALLOC_IN_QUOTA,
 						    NULL);
 			if (IS_ERR(uid_keyring)) {
 				ret = PTR_ERR(uid_keyring);
@@ -83,7 +87,7 @@ int install_user_keyrings(struct task_struct *tsk)
 		if (IS_ERR(session_keyring)) {
 			session_keyring =
 				keyring_alloc(buf, user->uid, (gid_t) -1,
-					      tsk, KEY_ALLOC_IN_QUOTA, NULL);
+					      cred, KEY_ALLOC_IN_QUOTA, NULL);
 			if (IS_ERR(session_keyring)) {
 				ret = PTR_ERR(session_keyring);
 				goto error_release;
@@ -115,140 +119,128 @@ error:
 	return ret;
 }
 
-/*****************************************************************************/
 /*
- * deal with the UID changing
+ * install a fresh thread keyring directly to new credentials
  */
-void switch_uid_keyring(struct user_struct *new_user)
+int install_thread_keyring_to_cred(struct cred *new)
 {
-#if 0 /* do nothing for now */
-	struct key *old;
-
-	/* switch to the new user's session keyring if we were running under
-	 * root's default session keyring */
-	if (new_user->uid != 0 &&
-	    current->session_keyring == &root_session_keyring
-	    ) {
-		atomic_inc(&new_user->session_keyring->usage);
-
-		task_lock(current);
-		old = current->session_keyring;
-		current->session_keyring = new_user->session_keyring;
-		task_unlock(current);
+	struct key *keyring;
 
-		key_put(old);
-	}
-#endif
+	keyring = keyring_alloc("_tid", new->uid, new->gid, new,
+				KEY_ALLOC_QUOTA_OVERRUN, NULL);
+	if (IS_ERR(keyring))
+		return PTR_ERR(keyring);
 
-} /* end switch_uid_keyring() */
+	new->thread_keyring = keyring;
+	return 0;
+}
 
-/*****************************************************************************/
 /*
  * install a fresh thread keyring, discarding the old one
  */
-int install_thread_keyring(struct task_struct *tsk)
+static int install_thread_keyring(void)
 {
-	struct key *keyring, *old;
-	char buf[20];
+	struct cred *new;
 	int ret;
 
-	sprintf(buf, "_tid.%u", tsk->pid);
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
 
-	keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-				KEY_ALLOC_QUOTA_OVERRUN, NULL);
-	if (IS_ERR(keyring)) {
-		ret = PTR_ERR(keyring);
-		goto error;
+	BUG_ON(new->thread_keyring);
+
+	ret = install_thread_keyring_to_cred(new);
+	if (ret < 0) {
+		abort_creds(new);
+		return ret;
 	}
 
-	task_lock(tsk);
-	old = tsk->thread_keyring;
-	tsk->thread_keyring = keyring;
-	task_unlock(tsk);
+	return commit_creds(new);
+}
 
-	ret = 0;
+/*
+ * install a process keyring directly to a credentials struct
+ * - returns -EEXIST if there was already a process keyring, 0 if one installed,
+ *   and other -ve on any other error
+ */
+int install_process_keyring_to_cred(struct cred *new)
+{
+	struct key *keyring;
+	int ret;
 
-	key_put(old);
-error:
+	if (new->tgcred->process_keyring)
+		return -EEXIST;
+
+	keyring = keyring_alloc("_pid", new->uid, new->gid,
+				new, KEY_ALLOC_QUOTA_OVERRUN, NULL);
+	if (IS_ERR(keyring))
+		return PTR_ERR(keyring);
+
+	spin_lock_irq(&new->tgcred->lock);
+	if (!new->tgcred->process_keyring) {
+		new->tgcred->process_keyring = keyring;
+		keyring = NULL;
+		ret = 0;
+	} else {
+		ret = -EEXIST;
+	}
+	spin_unlock_irq(&new->tgcred->lock);
+	key_put(keyring);
 	return ret;
+}
 
-} /* end install_thread_keyring() */
-
-/*****************************************************************************/
 /*
  * make sure a process keyring is installed
+ * - we
  */
-int install_process_keyring(struct task_struct *tsk)
+static int install_process_keyring(void)
 {
-	struct key *keyring;
-	char buf[20];
+	struct cred *new;
 	int ret;
 
-	might_sleep();
-
-	if (!tsk->signal->process_keyring) {
-		sprintf(buf, "_pid.%u", tsk->tgid);
-
-		keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-					KEY_ALLOC_QUOTA_OVERRUN, NULL);
-		if (IS_ERR(keyring)) {
-			ret = PTR_ERR(keyring);
-			goto error;
-		}
-
-		/* attach keyring */
-		spin_lock_irq(&tsk->sighand->siglock);
-		if (!tsk->signal->process_keyring) {
-			tsk->signal->process_keyring = keyring;
-			keyring = NULL;
-		}
-		spin_unlock_irq(&tsk->sighand->siglock);
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
 
-		key_put(keyring);
+	ret = install_process_keyring_to_cred(new);
+	if (ret < 0) {
+		abort_creds(new);
+		return ret != -EEXIST ?: 0;
 	}
 
-	ret = 0;
-error:
-	return ret;
-
-} /* end install_process_keyring() */
+	return commit_creds(new);
+}
 
-/*****************************************************************************/
 /*
- * install a session keyring, discarding the old one
- * - if a keyring is not supplied, an empty one is invented
+ * install a session keyring directly to a credentials struct
  */
-static int install_session_keyring(struct task_struct *tsk,
-				   struct key *keyring)
+static int install_session_keyring_to_cred(struct cred *cred,
+					   struct key *keyring)
 {
 	unsigned long flags;
 	struct key *old;
-	char buf[20];
 
 	might_sleep();
 
 	/* create an empty session keyring */
 	if (!keyring) {
-		sprintf(buf, "_ses.%u", tsk->tgid);
-
 		flags = KEY_ALLOC_QUOTA_OVERRUN;
-		if (tsk->signal->session_keyring)
+		if (cred->tgcred->session_keyring)
 			flags = KEY_ALLOC_IN_QUOTA;
 
-		keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-					flags, NULL);
+		keyring = keyring_alloc("_ses", cred->uid, cred->gid,
+					cred, flags, NULL);
 		if (IS_ERR(keyring))
 			return PTR_ERR(keyring);
-	}
-	else {
+	} else {
 		atomic_inc(&keyring->usage);
 	}
 
 	/* install the keyring */
-	spin_lock_irq(&tsk->sighand->siglock);
-	old = tsk->signal->session_keyring;
-	rcu_assign_pointer(tsk->signal->session_keyring, keyring);
-	spin_unlock_irq(&tsk->sighand->siglock);
+	spin_lock_irq(&cred->tgcred->lock);
+	old = cred->tgcred->session_keyring;
+	rcu_assign_pointer(cred->tgcred->session_keyring, keyring);
+	spin_unlock_irq(&cred->tgcred->lock);
 
 	/* we're using RCU on the pointer, but there's no point synchronising
 	 * on it if it didn't previously point to anything */
@@ -258,110 +250,29 @@ static int install_session_keyring(struct task_struct *tsk,
 	}
 
 	return 0;
+}
 
-} /* end install_session_keyring() */
-
-/*****************************************************************************/
-/*
- * copy the keys in a thread group for fork without CLONE_THREAD
- */
-int copy_thread_group_keys(struct task_struct *tsk)
-{
-	key_check(current->thread_group->session_keyring);
-	key_check(current->thread_group->process_keyring);
-
-	/* no process keyring yet */
-	tsk->signal->process_keyring = NULL;
-
-	/* same session keyring */
-	rcu_read_lock();
-	tsk->signal->session_keyring =
-		key_get(rcu_dereference(current->signal->session_keyring));
-	rcu_read_unlock();
-
-	return 0;
-
-} /* end copy_thread_group_keys() */
-
-/*****************************************************************************/
-/*
- * copy the keys for fork
- */
-int copy_keys(unsigned long clone_flags, struct task_struct *tsk)
-{
-	key_check(tsk->thread_keyring);
-	key_check(tsk->request_key_auth);
-
-	/* no thread keyring yet */
-	tsk->thread_keyring = NULL;
-
-	/* copy the request_key() authorisation for this thread */
-	key_get(tsk->request_key_auth);
-
-	return 0;
-
-} /* end copy_keys() */
-
-/*****************************************************************************/
-/*
- * dispose of thread group keys upon thread group destruction
- */
-void exit_thread_group_keys(struct signal_struct *tg)
-{
-	key_put(tg->session_keyring);
-	key_put(tg->process_keyring);
-
-} /* end exit_thread_group_keys() */
-
-/*****************************************************************************/
-/*
- * dispose of per-thread keys upon thread exit
- */
-void exit_keys(struct task_struct *tsk)
-{
-	key_put(tsk->thread_keyring);
-	key_put(tsk->request_key_auth);
-
-} /* end exit_keys() */
-
-/*****************************************************************************/
 /*
- * deal with execve()
+ * install a session keyring, discarding the old one
+ * - if a keyring is not supplied, an empty one is invented
  */
-int exec_keys(struct task_struct *tsk)
+static int install_session_keyring(struct key *keyring)
 {
-	struct key *old;
-
-	/* newly exec'd tasks don't get a thread keyring */
-	task_lock(tsk);
-	old = tsk->thread_keyring;
-	tsk->thread_keyring = NULL;
-	task_unlock(tsk);
-
-	key_put(old);
-
-	/* discard the process keyring from a newly exec'd task */
-	spin_lock_irq(&tsk->sighand->siglock);
-	old = tsk->signal->process_keyring;
-	tsk->signal->process_keyring = NULL;
-	spin_unlock_irq(&tsk->sighand->siglock);
-
-	key_put(old);
-
-	return 0;
+	struct cred *new;
+	int ret;
 
-} /* end exec_keys() */
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
 
-/*****************************************************************************/
-/*
- * deal with SUID programs
- * - we might want to make this invent a new session keyring
- */
-int suid_keys(struct task_struct *tsk)
-{
-	return 0;
+	ret = install_session_keyring_to_cred(new, NULL);
+	if (ret < 0) {
+		abort_creds(new);
+		return ret;
+	}
 
-} /* end suid_keys() */
+	return commit_creds(new);
+}
 
 /*****************************************************************************/
 /*
@@ -370,10 +281,11 @@ int suid_keys(struct task_struct *tsk)
 void key_fsuid_changed(struct task_struct *tsk)
 {
 	/* update the ownership of the thread keyring */
-	if (tsk->thread_keyring) {
-		down_write(&tsk->thread_keyring->sem);
-		tsk->thread_keyring->uid = tsk->fsuid;
-		up_write(&tsk->thread_keyring->sem);
+	BUG_ON(!tsk->cred);
+	if (tsk->cred->thread_keyring) {
+		down_write(&tsk->cred->thread_keyring->sem);
+		tsk->cred->thread_keyring->uid = tsk->cred->fsuid;
+		up_write(&tsk->cred->thread_keyring->sem);
 	}
 
 } /* end key_fsuid_changed() */
@@ -385,10 +297,11 @@ void key_fsuid_changed(struct task_struct *tsk)
 void key_fsgid_changed(struct task_struct *tsk)
 {
 	/* update the ownership of the thread keyring */
-	if (tsk->thread_keyring) {
-		down_write(&tsk->thread_keyring->sem);
-		tsk->thread_keyring->gid = tsk->fsgid;
-		up_write(&tsk->thread_keyring->sem);
+	BUG_ON(!tsk->cred);
+	if (tsk->cred->thread_keyring) {
+		down_write(&tsk->cred->thread_keyring->sem);
+		tsk->cred->thread_keyring->gid = tsk->cred->fsgid;
+		up_write(&tsk->cred->thread_keyring->sem);
 	}
 
 } /* end key_fsgid_changed() */
@@ -404,7 +317,7 @@ void key_fsgid_changed(struct task_struct *tsk)
 key_ref_t search_process_keyrings(struct key_type *type,
 				  const void *description,
 				  key_match_func_t match,
-				  struct task_struct *context)
+				  const struct cred *cred)
 {
 	struct request_key_auth *rka;
 	key_ref_t key_ref, ret, err;
@@ -423,10 +336,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
 	err = ERR_PTR(-EAGAIN);
 
 	/* search the thread keyring first */
-	if (context->thread_keyring) {
+	if (cred->thread_keyring) {
 		key_ref = keyring_search_aux(
-			make_key_ref(context->thread_keyring, 1),
-			context, type, description, match);
+			make_key_ref(cred->thread_keyring, 1),
+			cred, type, description, match);
 		if (!IS_ERR(key_ref))
 			goto found;
 
@@ -444,10 +357,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
 	}
 
 	/* search the process keyring second */
-	if (context->signal->process_keyring) {
+	if (cred->tgcred->process_keyring) {
 		key_ref = keyring_search_aux(
-			make_key_ref(context->signal->process_keyring, 1),
-			context, type, description, match);
+			make_key_ref(cred->tgcred->process_keyring, 1),
+			cred, type, description, match);
 		if (!IS_ERR(key_ref))
 			goto found;
 
@@ -465,13 +378,13 @@ key_ref_t search_process_keyrings(struct key_type *type,
 	}
 
 	/* search the session keyring */
-	if (context->signal->session_keyring) {
+	if (cred->tgcred->session_keyring) {
 		rcu_read_lock();
 		key_ref = keyring_search_aux(
 			make_key_ref(rcu_dereference(
-					     context->signal->session_keyring),
+					     cred->tgcred->session_keyring),
 				     1),
-			context, type, description, match);
+			cred, type, description, match);
 		rcu_read_unlock();
 
 		if (!IS_ERR(key_ref))
@@ -490,10 +403,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
 		}
 	}
 	/* or search the user-session keyring */
-	else if (context->user->session_keyring) {
+	else if (cred->user->session_keyring) {
 		key_ref = keyring_search_aux(
-			make_key_ref(context->user->session_keyring, 1),
-			context, type, description, match);
+			make_key_ref(cred->user->session_keyring, 1),
+			cred, type, description, match);
 		if (!IS_ERR(key_ref))
 			goto found;
 
@@ -514,20 +427,20 @@ key_ref_t search_process_keyrings(struct key_type *type,
 	 * search the keyrings of the process mentioned there
 	 * - we don't permit access to request_key auth keys via this method
 	 */
-	if (context->request_key_auth &&
-	    context == current &&
+	if (cred->request_key_auth &&
+	    cred == current_cred() &&
 	    type != &key_type_request_key_auth
 	    ) {
 		/* defend against the auth key being revoked */
-		down_read(&context->request_key_auth->sem);
+		down_read(&cred->request_key_auth->sem);
 
-		if (key_validate(context->request_key_auth) == 0) {
-			rka = context->request_key_auth->payload.data;
+		if (key_validate(cred->request_key_auth) == 0) {
+			rka = cred->request_key_auth->payload.data;
 
 			key_ref = search_process_keyrings(type, description,
-							  match, rka->context);
+							  match, rka->cred);
 
-			up_read(&context->request_key_auth->sem);
+			up_read(&cred->request_key_auth->sem);
 
 			if (!IS_ERR(key_ref))
 				goto found;
@@ -544,7 +457,7 @@ key_ref_t search_process_keyrings(struct key_type *type,
 				break;
 			}
 		} else {
-			up_read(&context->request_key_auth->sem);
+			up_read(&cred->request_key_auth->sem);
 		}
 	}
 
@@ -572,93 +485,98 @@ static int lookup_user_key_possessed(const struct key *key, const void *target)
  * - don't create special keyrings unless so requested
  * - partially constructed keys aren't found unless requested
  */
-key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
-			  int create, int partial, key_perm_t perm)
+key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
+			  key_perm_t perm)
 {
-	key_ref_t key_ref, skey_ref;
+	struct request_key_auth *rka;
+	const struct cred *cred;
 	struct key *key;
+	key_ref_t key_ref, skey_ref;
 	int ret;
 
-	if (!context)
-		context = current;
-
+try_again:
+	cred = get_current_cred();
 	key_ref = ERR_PTR(-ENOKEY);
 
 	switch (id) {
 	case KEY_SPEC_THREAD_KEYRING:
-		if (!context->thread_keyring) {
+		if (!cred->thread_keyring) {
 			if (!create)
 				goto error;
 
-			ret = install_thread_keyring(context);
+			ret = install_thread_keyring();
 			if (ret < 0) {
 				key = ERR_PTR(ret);
 				goto error;
 			}
+			goto reget_creds;
 		}
 
-		key = context->thread_keyring;
+		key = cred->thread_keyring;
 		atomic_inc(&key->usage);
 		key_ref = make_key_ref(key, 1);
 		break;
 
 	case KEY_SPEC_PROCESS_KEYRING:
-		if (!context->signal->process_keyring) {
+		if (!cred->tgcred->process_keyring) {
 			if (!create)
 				goto error;
 
-			ret = install_process_keyring(context);
+			ret = install_process_keyring();
 			if (ret < 0) {
 				key = ERR_PTR(ret);
 				goto error;
 			}
+			goto reget_creds;
 		}
 
-		key = context->signal->process_keyring;
+		key = cred->tgcred->process_keyring;
 		atomic_inc(&key->usage);
 		key_ref = make_key_ref(key, 1);
 		break;
 
 	case KEY_SPEC_SESSION_KEYRING:
-		if (!context->signal->session_keyring) {
+		if (!cred->tgcred->session_keyring) {
 			/* always install a session keyring upon access if one
 			 * doesn't exist yet */
-			ret = install_user_keyrings(context);
+			ret = install_user_keyrings();
 			if (ret < 0)
 				goto error;
 			ret = install_session_keyring(
-				context, context->user->session_keyring);
+				cred->user->session_keyring);
+
 			if (ret < 0)
 				goto error;
+			goto reget_creds;
 		}
 
 		rcu_read_lock();
-		key = rcu_dereference(context->signal->session_keyring);
+		key = rcu_dereference(cred->tgcred->session_keyring);
 		atomic_inc(&key->usage);
 		rcu_read_unlock();
 		key_ref = make_key_ref(key, 1);
 		break;
 
 	case KEY_SPEC_USER_KEYRING:
-		if (!context->user->uid_keyring) {
-			ret = install_user_keyrings(context);
+		if (!cred->user->uid_keyring) {
+			ret = install_user_keyrings();
 			if (ret < 0)
 				goto error;
 		}
 
-		key = context->user->uid_keyring;
+		key = cred->user->uid_keyring;
 		atomic_inc(&key->usage);
 		key_ref = make_key_ref(key, 1);
 		break;
 
 	case KEY_SPEC_USER_SESSION_KEYRING:
-		if (!context->user->session_keyring) {
-			ret = install_user_keyrings(context);
+		if (!cred->user->session_keyring) {
+			ret = install_user_keyrings();
 			if (ret < 0)
 				goto error;
 		}
 
-		key = context->user->session_keyring;
+		key = cred->user->session_keyring;
 		atomic_inc(&key->usage);
 		key_ref = make_key_ref(key, 1);
 		break;
@@ -669,7 +587,7 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
 		goto error;
 
 	case KEY_SPEC_REQKEY_AUTH_KEY:
-		key = context->request_key_auth;
+		key = cred->request_key_auth;
 		if (!key)
 			goto error;
 
@@ -677,6 +595,25 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
 		key_ref = make_key_ref(key, 1);
 		break;
 
+	case KEY_SPEC_REQUESTOR_KEYRING:
+		if (!cred->request_key_auth)
+			goto error;
+
+		down_read(&cred->request_key_auth->sem);
+		if (cred->request_key_auth->flags & KEY_FLAG_REVOKED) {
+			key_ref = ERR_PTR(-EKEYREVOKED);
+			key = NULL;
+		} else {
+			rka = cred->request_key_auth->payload.data;
+			key = rka->dest_keyring;
+			atomic_inc(&key->usage);
+		}
+		up_read(&cred->request_key_auth->sem);
+		if (!key)
+			goto error;
+		key_ref = make_key_ref(key, 1);
+		break;
+
 	default:
 		key_ref = ERR_PTR(-EINVAL);
 		if (id < 1)
@@ -693,7 +630,7 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
 		/* check to see if we possess the key */
 		skey_ref = search_process_keyrings(key->type, key,
 						   lookup_user_key_possessed,
-						   current);
+						   cred);
 
 		if (!IS_ERR(skey_ref)) {
 			key_put(key);
@@ -725,11 +662,12 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
 		goto invalid_key;
 
 	/* check the permissions */
-	ret = key_task_permission(key_ref, context, perm);
+	ret = key_task_permission(key_ref, cred, perm);
 	if (ret < 0)
 		goto invalid_key;
 
 error:
+	put_cred(cred);
 	return key_ref;
 
 invalid_key:
@@ -737,6 +675,12 @@ invalid_key:
 	key_ref = ERR_PTR(ret);
 	goto error;
 
+	/* if we attempted to install a keyring, then it may have caused new
+	 * creds to be installed */
+reget_creds:
+	put_cred(cred);
+	goto try_again;
+
 } /* end lookup_user_key() */
 
 /*****************************************************************************/
@@ -748,20 +692,33 @@ invalid_key:
  */
 long join_session_keyring(const char *name)
 {
-	struct task_struct *tsk = current;
+	const struct cred *old;
+	struct cred *new;
 	struct key *keyring;
-	long ret;
+	long ret, serial;
+
+	/* only permit this if there's a single thread in the thread group -
+	 * this avoids us having to adjust the creds on all threads and risking
+	 * ENOMEM */
+	if (!is_single_threaded(current))
+		return -EMLINK;
+
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
+	old = current_cred();
 
 	/* if no name is provided, install an anonymous keyring */
 	if (!name) {
-		ret = install_session_keyring(tsk, NULL);
+		ret = install_session_keyring_to_cred(new, NULL);
 		if (ret < 0)
 			goto error;
 
-		rcu_read_lock();
-		ret = rcu_dereference(tsk->signal->session_keyring)->serial;
-		rcu_read_unlock();
-		goto error;
+		serial = new->tgcred->session_keyring->serial;
+		ret = commit_creds(new);
+		if (ret == 0)
+			ret = serial;
+		goto okay;
 	}
 
 	/* allow the user to join or create a named keyring */
@@ -771,29 +728,33 @@ long join_session_keyring(const char *name)
 	keyring = find_keyring_by_name(name, false);
 	if (PTR_ERR(keyring) == -ENOKEY) {
 		/* not found - try and create a new one */
-		keyring = keyring_alloc(name, tsk->uid, tsk->gid, tsk,
+		keyring = keyring_alloc(name, old->uid, old->gid, old,
 					KEY_ALLOC_IN_QUOTA, NULL);
 		if (IS_ERR(keyring)) {
 			ret = PTR_ERR(keyring);
 			goto error2;
 		}
-	}
-	else if (IS_ERR(keyring)) {
+	} else if (IS_ERR(keyring)) {
 		ret = PTR_ERR(keyring);
 		goto error2;
 	}
 
 	/* we've got a keyring - now to install it */
-	ret = install_session_keyring(tsk, keyring);
+	ret = install_session_keyring_to_cred(new, keyring);
 	if (ret < 0)
 		goto error2;
 
+	commit_creds(new);
+	mutex_unlock(&key_session_mutex);
+
 	ret = keyring->serial;
 	key_put(keyring);
+okay:
+	return ret;
 
 error2:
 	mutex_unlock(&key_session_mutex);
 error:
+	abort_creds(new);
 	return ret;
-
-} /* end join_session_keyring() */
+}
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index abea08f87fe..0e04f72ef2d 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -19,6 +19,8 @@
 #include <linux/slab.h>
 #include "internal.h"
 
+#define key_negative_timeout	60	/* default timeout on a negative key's existence */
+
 /*
  * wait_on_bit() sleep function for uninterruptible waiting
  */
@@ -64,7 +66,7 @@ static int call_sbin_request_key(struct key_construction *cons,
 				 const char *op,
 				 void *aux)
 {
-	struct task_struct *tsk = current;
+	const struct cred *cred = current_cred();
 	key_serial_t prkey, sskey;
 	struct key *key = cons->key, *authkey = cons->authkey, *keyring;
 	char *argv[9], *envp[3], uid_str[12], gid_str[12];
@@ -74,15 +76,17 @@ static int call_sbin_request_key(struct key_construction *cons,
 
 	kenter("{%d},{%d},%s", key->serial, authkey->serial, op);
 
-	ret = install_user_keyrings(tsk);
+	ret = install_user_keyrings();
 	if (ret < 0)
 		goto error_alloc;
 
 	/* allocate a new session keyring */
 	sprintf(desc, "_req.%u", key->serial);
 
-	keyring = keyring_alloc(desc, current->fsuid, current->fsgid, current,
+	cred = get_current_cred();
+	keyring = keyring_alloc(desc, cred->fsuid, cred->fsgid, cred,
 				KEY_ALLOC_QUOTA_OVERRUN, NULL);
+	put_cred(cred);
 	if (IS_ERR(keyring)) {
 		ret = PTR_ERR(keyring);
 		goto error_alloc;
@@ -94,29 +98,24 @@ static int call_sbin_request_key(struct key_construction *cons,
 		goto error_link;
 
 	/* record the UID and GID */
-	sprintf(uid_str, "%d", current->fsuid);
-	sprintf(gid_str, "%d", current->fsgid);
+	sprintf(uid_str, "%d", cred->fsuid);
+	sprintf(gid_str, "%d", cred->fsgid);
 
 	/* we say which key is under construction */
 	sprintf(key_str, "%d", key->serial);
 
 	/* we specify the process's default keyrings */
 	sprintf(keyring_str[0], "%d",
-		tsk->thread_keyring ? tsk->thread_keyring->serial : 0);
+		cred->thread_keyring ? cred->thread_keyring->serial : 0);
 
 	prkey = 0;
-	if (tsk->signal->process_keyring)
-		prkey = tsk->signal->process_keyring->serial;
-
-	sprintf(keyring_str[1], "%d", prkey);
+	if (cred->tgcred->process_keyring)
+		prkey = cred->tgcred->process_keyring->serial;
 
-	if (tsk->signal->session_keyring) {
-		rcu_read_lock();
-		sskey = rcu_dereference(tsk->signal->session_keyring)->serial;
-		rcu_read_unlock();
-	} else {
-		sskey = tsk->user->session_keyring->serial;
-	}
+	if (cred->tgcred->session_keyring)
+		sskey = rcu_dereference(cred->tgcred->session_keyring)->serial;
+	else
+		sskey = cred->user->session_keyring->serial;
 
 	sprintf(keyring_str[2], "%d", sskey);
 
@@ -157,8 +156,8 @@ error_link:
 	key_put(keyring);
 
 error_alloc:
-	kleave(" = %d", ret);
 	complete_request_key(cons, ret);
+	kleave(" = %d", ret);
 	return ret;
 }
 
@@ -167,7 +166,8 @@ error_alloc:
  * - we ignore program failure and go on key status instead
  */
 static int construct_key(struct key *key, const void *callout_info,
-			 size_t callout_len, void *aux)
+			 size_t callout_len, void *aux,
+			 struct key *dest_keyring)
 {
 	struct key_construction *cons;
 	request_key_actor_t actor;
@@ -181,7 +181,8 @@ static int construct_key(struct key *key, const void *callout_info,
 		return -ENOMEM;
 
 	/* allocate an authorisation key */
-	authkey = request_key_auth_new(key, callout_info, callout_len);
+	authkey = request_key_auth_new(key, callout_info, callout_len,
+				       dest_keyring);
 	if (IS_ERR(authkey)) {
 		kfree(cons);
 		ret = PTR_ERR(authkey);
@@ -209,46 +210,67 @@ static int construct_key(struct key *key, const void *callout_info,
 }
 
 /*
- * link a key to the appropriate destination keyring
- * - the caller must hold a write lock on the destination keyring
+ * get the appropriate destination keyring for the request
+ * - we return whatever keyring we select with an extra reference upon it which
+ *   the caller must release
  */
-static void construct_key_make_link(struct key *key, struct key *dest_keyring)
+static void construct_get_dest_keyring(struct key **_dest_keyring)
 {
-	struct task_struct *tsk = current;
-	struct key *drop = NULL;
+	struct request_key_auth *rka;
+	const struct cred *cred = current_cred();
+	struct key *dest_keyring = *_dest_keyring, *authkey;
 
-	kenter("{%d},%p", key->serial, dest_keyring);
+	kenter("%p", dest_keyring);
 
 	/* find the appropriate keyring */
-	if (!dest_keyring) {
-		switch (tsk->jit_keyring) {
+	if (dest_keyring) {
+		/* the caller supplied one */
+		key_get(dest_keyring);
+	} else {
+		/* use a default keyring; falling through the cases until we
+		 * find one that we actually have */
+		switch (cred->jit_keyring) {
 		case KEY_REQKEY_DEFL_DEFAULT:
+		case KEY_REQKEY_DEFL_REQUESTOR_KEYRING:
+			if (cred->request_key_auth) {
+				authkey = cred->request_key_auth;
+				down_read(&authkey->sem);
+				rka = authkey->payload.data;
+				if (!test_bit(KEY_FLAG_REVOKED,
+					      &authkey->flags))
+					dest_keyring =
+						key_get(rka->dest_keyring);
+				up_read(&authkey->sem);
+				if (dest_keyring)
+					break;
+			}
+
 		case KEY_REQKEY_DEFL_THREAD_KEYRING:
-			dest_keyring = tsk->thread_keyring;
+			dest_keyring = key_get(cred->thread_keyring);
 			if (dest_keyring)
 				break;
 
 		case KEY_REQKEY_DEFL_PROCESS_KEYRING:
-			dest_keyring = tsk->signal->process_keyring;
+			dest_keyring = key_get(cred->tgcred->process_keyring);
 			if (dest_keyring)
 				break;
 
 		case KEY_REQKEY_DEFL_SESSION_KEYRING:
 			rcu_read_lock();
 			dest_keyring = key_get(
-				rcu_dereference(tsk->signal->session_keyring));
+				rcu_dereference(cred->tgcred->session_keyring));
 			rcu_read_unlock();
-			drop = dest_keyring;
 
 			if (dest_keyring)
 				break;
 
 		case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
-			dest_keyring = tsk->user->session_keyring;
+			dest_keyring =
+				key_get(cred->user->session_keyring);
 			break;
 
 		case KEY_REQKEY_DEFL_USER_KEYRING:
-			dest_keyring = tsk->user->uid_keyring;
+			dest_keyring = key_get(cred->user->uid_keyring);
 			break;
 
 		case KEY_REQKEY_DEFL_GROUP_KEYRING:
@@ -257,10 +279,9 @@ static void construct_key_make_link(struct key *key, struct key *dest_keyring)
 		}
 	}
 
-	/* and attach the key to it */
-	__key_link(dest_keyring, key);
-	key_put(drop);
-	kleave("");
+	*_dest_keyring = dest_keyring;
+	kleave(" [dk %d]", key_serial(dest_keyring));
+	return;
 }
 
 /*
@@ -275,6 +296,7 @@ static int construct_alloc_key(struct key_type *type,
 			       struct key_user *user,
 			       struct key **_key)
 {
+	const struct cred *cred = current_cred();
 	struct key *key;
 	key_ref_t key_ref;
 
@@ -282,33 +304,28 @@ static int construct_alloc_key(struct key_type *type,
 
 	mutex_lock(&user->cons_lock);
 
-	key = key_alloc(type, description,
-			current->fsuid, current->fsgid, current, KEY_POS_ALL,
-			flags);
+	key = key_alloc(type, description, cred->fsuid, cred->fsgid, cred,
+			KEY_POS_ALL, flags);
 	if (IS_ERR(key))
 		goto alloc_failed;
 
 	set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);
 
-	if (dest_keyring)
-		down_write(&dest_keyring->sem);
+	down_write(&dest_keyring->sem);
 
 	/* attach the key to the destination keyring under lock, but we do need
 	 * to do another check just in case someone beat us to it whilst we
 	 * waited for locks */
 	mutex_lock(&key_construction_mutex);
 
-	key_ref = search_process_keyrings(type, description, type->match,
-					  current);
+	key_ref = search_process_keyrings(type, description, type->match, cred);
 	if (!IS_ERR(key_ref))
 		goto key_already_present;
 
-	if (dest_keyring)
-		construct_key_make_link(key, dest_keyring);
+	__key_link(dest_keyring, key);
 
 	mutex_unlock(&key_construction_mutex);
-	if (dest_keyring)
-		up_write(&dest_keyring->sem);
+	up_write(&dest_keyring->sem);
 	mutex_unlock(&user->cons_lock);
 	*_key = key;
 	kleave(" = 0 [%d]", key_serial(key));
@@ -346,25 +363,36 @@ static struct key *construct_key_and_link(struct key_type *type,
 	struct key *key;
 	int ret;
 
-	user = key_user_lookup(current->fsuid);
+	kenter("");
+
+	user = key_user_lookup(current_fsuid());
 	if (!user)
 		return ERR_PTR(-ENOMEM);
 
+	construct_get_dest_keyring(&dest_keyring);
+
 	ret = construct_alloc_key(type, description, dest_keyring, flags, user,
 				  &key);
 	key_user_put(user);
 
 	if (ret == 0) {
-		ret = construct_key(key, callout_info, callout_len, aux);
-		if (ret < 0)
+		ret = construct_key(key, callout_info, callout_len, aux,
+				    dest_keyring);
+		if (ret < 0) {
+			kdebug("cons failed");
 			goto construction_failed;
+		}
 	}
 
+	key_put(dest_keyring);
+	kleave(" = key %d", key_serial(key));
 	return key;
 
 construction_failed:
 	key_negate_and_link(key, key_negative_timeout, NULL, NULL);
 	key_put(key);
+	key_put(dest_keyring);
+	kleave(" = %d", ret);
 	return ERR_PTR(ret);
 }
 
@@ -383,6 +411,7 @@ struct key *request_key_and_link(struct key_type *type,
 				 struct key *dest_keyring,
 				 unsigned long flags)
 {
+	const struct cred *cred = current_cred();
 	struct key *key;
 	key_ref_t key_ref;
 
@@ -392,7 +421,7 @@ struct key *request_key_and_link(struct key_type *type,
 
 	/* search all the process keyrings for a key */
 	key_ref = search_process_keyrings(type, description, type->match,
-					  current);
+					  cred);
 
 	if (!IS_ERR(key_ref)) {
 		key = key_ref_to_ptr(key_ref);
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index bd237b0a633..86747151ee5 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -105,9 +105,9 @@ static void request_key_auth_revoke(struct key *key)
 
 	kenter("{%d}", key->serial);
 
-	if (rka->context) {
-		put_task_struct(rka->context);
-		rka->context = NULL;
+	if (rka->cred) {
+		put_cred(rka->cred);
+		rka->cred = NULL;
 	}
 
 } /* end request_key_auth_revoke() */
@@ -122,12 +122,13 @@ static void request_key_auth_destroy(struct key *key)
 
 	kenter("{%d}", key->serial);
 
-	if (rka->context) {
-		put_task_struct(rka->context);
-		rka->context = NULL;
+	if (rka->cred) {
+		put_cred(rka->cred);
+		rka->cred = NULL;
 	}
 
 	key_put(rka->target_key);
+	key_put(rka->dest_keyring);
 	kfree(rka->callout_info);
 	kfree(rka);
 
@@ -139,9 +140,10 @@ static void request_key_auth_destroy(struct key *key)
  * access to the caller's security data
  */
 struct key *request_key_auth_new(struct key *target, const void *callout_info,
-				 size_t callout_len)
+				 size_t callout_len, struct key *dest_keyring)
 {
 	struct request_key_auth *rka, *irka;
+	const struct cred *cred = current->cred;
 	struct key *authkey = NULL;
 	char desc[20];
 	int ret;
@@ -163,31 +165,29 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
 
 	/* see if the calling process is already servicing the key request of
 	 * another process */
-	if (current->request_key_auth) {
+	if (cred->request_key_auth) {
 		/* it is - use that instantiation context here too */
-		down_read(&current->request_key_auth->sem);
+		down_read(&cred->request_key_auth->sem);
 
 		/* if the auth key has been revoked, then the key we're
 		 * servicing is already instantiated */
-		if (test_bit(KEY_FLAG_REVOKED,
-			     &current->request_key_auth->flags))
+		if (test_bit(KEY_FLAG_REVOKED, &cred->request_key_auth->flags))
 			goto auth_key_revoked;
 
-		irka = current->request_key_auth->payload.data;
-		rka->context = irka->context;
+		irka = cred->request_key_auth->payload.data;
+		rka->cred = get_cred(irka->cred);
 		rka->pid = irka->pid;
-		get_task_struct(rka->context);
 
-		up_read(&current->request_key_auth->sem);
+		up_read(&cred->request_key_auth->sem);
 	}
 	else {
 		/* it isn't - use this process as the context */
-		rka->context = current;
+		rka->cred = get_cred(cred);
 		rka->pid = current->pid;
-		get_task_struct(rka->context);
 	}
 
 	rka->target_key = key_get(target);
+	rka->dest_keyring = key_get(dest_keyring);
 	memcpy(rka->callout_info, callout_info, callout_len);
 	rka->callout_len = callout_len;
 
@@ -195,7 +195,7 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
 	sprintf(desc, "%x", target->serial);
 
 	authkey = key_alloc(&key_type_request_key_auth, desc,
-			    current->fsuid, current->fsgid, current,
+			    cred->fsuid, cred->fsgid, cred,
 			    KEY_POS_VIEW | KEY_POS_READ | KEY_POS_SEARCH |
 			    KEY_USR_VIEW, KEY_ALLOC_NOT_IN_QUOTA);
 	if (IS_ERR(authkey)) {
@@ -203,16 +203,16 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
 		goto error_alloc;
 	}
 
-	/* construct and attach to the keyring */
+	/* construct the auth key */
 	ret = key_instantiate_and_link(authkey, rka, 0, NULL, NULL);
 	if (ret < 0)
 		goto error_inst;
 
-	kleave(" = {%d}", authkey->serial);
+	kleave(" = {%d,%d}", authkey->serial, atomic_read(&authkey->usage));
 	return authkey;
 
 auth_key_revoked:
-	up_read(&current->request_key_auth->sem);
+	up_read(&cred->request_key_auth->sem);
 	kfree(rka->callout_info);
 	kfree(rka);
 	kleave("= -EKEYREVOKED");
@@ -223,6 +223,7 @@ error_inst:
 	key_put(authkey);
 error_alloc:
 	key_put(rka->target_key);
+	key_put(rka->dest_keyring);
 	kfree(rka->callout_info);
 	kfree(rka);
 	kleave("= %d", ret);
@@ -254,6 +255,7 @@ static int key_get_instantiation_authkey_match(const struct key *key,
  */
 struct key *key_get_instantiation_authkey(key_serial_t target_id)
 {
+	const struct cred *cred = current_cred();
 	struct key *authkey;
 	key_ref_t authkey_ref;
 
@@ -261,7 +263,7 @@ struct key *key_get_instantiation_authkey(key_serial_t target_id)
 		&key_type_request_key_auth,
 		(void *) (unsigned long) target_id,
 		key_get_instantiation_authkey_match,
-		current);
+		cred);
 
 	if (IS_ERR(authkey_ref)) {
 		authkey = ERR_CAST(authkey_ref);
diff --git a/security/root_plug.c b/security/root_plug.c
index c3f68b5b372..40fb4f15e27 100644
--- a/security/root_plug.c
+++ b/security/root_plug.c
@@ -55,9 +55,9 @@ static int rootplug_bprm_check_security (struct linux_binprm *bprm)
 	struct usb_device *dev;
 
 	root_dbg("file %s, e_uid = %d, e_gid = %d\n",
-		 bprm->filename, bprm->e_uid, bprm->e_gid);
+		 bprm->filename, bprm->cred->euid, bprm->cred->egid);
 
-	if (bprm->e_gid == 0) {
+	if (bprm->cred->egid == 0) {
 		dev = usb_find_device(vendor_id, product_id);
 		if (!dev) {
 			root_dbg("e_gid = 0, and device not found, "
@@ -75,15 +75,12 @@ static struct security_operations rootplug_security_ops = {
 	.ptrace_may_access =		cap_ptrace_may_access,
 	.ptrace_traceme =		cap_ptrace_traceme,
 	.capget =			cap_capget,
-	.capset_check =			cap_capset_check,
-	.capset_set =			cap_capset_set,
+	.capset =			cap_capset,
 	.capable =			cap_capable,
 
-	.bprm_apply_creds =		cap_bprm_apply_creds,
-	.bprm_set_security =		cap_bprm_set_security,
+	.bprm_set_creds =		cap_bprm_set_creds,
 
-	.task_post_setuid =		cap_task_post_setuid,
-	.task_reparent_to_init =	cap_task_reparent_to_init,
+	.task_fix_setuid =		cap_task_fix_setuid,
 	.task_prctl =			cap_task_prctl,
 
 	.bprm_check_security =		rootplug_bprm_check_security,
diff --git a/security/security.c b/security/security.c
index c0acfa7177e..d85dbb37c97 100644
--- a/security/security.c
+++ b/security/security.c
@@ -145,25 +145,23 @@ int security_capget(struct task_struct *target,
 	return security_ops->capget(target, effective, inheritable, permitted);
 }
 
-int security_capset_check(struct task_struct *target,
-			   kernel_cap_t *effective,
-			   kernel_cap_t *inheritable,
-			   kernel_cap_t *permitted)
+int security_capset(struct cred *new, const struct cred *old,
+		    const kernel_cap_t *effective,
+		    const kernel_cap_t *inheritable,
+		    const kernel_cap_t *permitted)
 {
-	return security_ops->capset_check(target, effective, inheritable, permitted);
+	return security_ops->capset(new, old,
+				    effective, inheritable, permitted);
 }
 
-void security_capset_set(struct task_struct *target,
-			  kernel_cap_t *effective,
-			  kernel_cap_t *inheritable,
-			  kernel_cap_t *permitted)
+int security_capable(struct task_struct *tsk, int cap)
 {
-	security_ops->capset_set(target, effective, inheritable, permitted);
+	return security_ops->capable(tsk, cap, SECURITY_CAP_AUDIT);
 }
 
-int security_capable(struct task_struct *tsk, int cap)
+int security_capable_noaudit(struct task_struct *tsk, int cap)
 {
-	return security_ops->capable(tsk, cap);
+	return security_ops->capable(tsk, cap, SECURITY_CAP_NOAUDIT);
 }
 
 int security_acct(struct file *file)
@@ -215,34 +213,24 @@ int security_vm_enough_memory_kern(long pages)
 	return security_ops->vm_enough_memory(current->mm, pages);
 }
 
-int security_bprm_alloc(struct linux_binprm *bprm)
-{
-	return security_ops->bprm_alloc_security(bprm);
-}
-
-void security_bprm_free(struct linux_binprm *bprm)
-{
-	security_ops->bprm_free_security(bprm);
-}
-
-void security_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+int security_bprm_set_creds(struct linux_binprm *bprm)
 {
-	security_ops->bprm_apply_creds(bprm, unsafe);
+	return security_ops->bprm_set_creds(bprm);
 }
 
-void security_bprm_post_apply_creds(struct linux_binprm *bprm)
+int security_bprm_check(struct linux_binprm *bprm)
 {
-	security_ops->bprm_post_apply_creds(bprm);
+	return security_ops->bprm_check_security(bprm);
 }
 
-int security_bprm_set(struct linux_binprm *bprm)
+void security_bprm_committing_creds(struct linux_binprm *bprm)
 {
-	return security_ops->bprm_set_security(bprm);
+	security_ops->bprm_committing_creds(bprm);
 }
 
-int security_bprm_check(struct linux_binprm *bprm)
+void security_bprm_committed_creds(struct linux_binprm *bprm)
 {
-	return security_ops->bprm_check_security(bprm);
+	security_ops->bprm_committed_creds(bprm);
 }
 
 int security_bprm_secureexec(struct linux_binprm *bprm)
@@ -266,9 +254,9 @@ int security_sb_copy_data(char *orig, char *copy)
 }
 EXPORT_SYMBOL(security_sb_copy_data);
 
-int security_sb_kern_mount(struct super_block *sb, void *data)
+int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
-	return security_ops->sb_kern_mount(sb, data);
+	return security_ops->sb_kern_mount(sb, flags, data);
 }
 
 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
@@ -603,9 +591,9 @@ int security_file_receive(struct file *file)
 	return security_ops->file_receive(file);
 }
 
-int security_dentry_open(struct file *file)
+int security_dentry_open(struct file *file, const struct cred *cred)
 {
-	return security_ops->dentry_open(file);
+	return security_ops->dentry_open(file, cred);
 }
 
 int security_task_create(unsigned long clone_flags)
@@ -613,14 +601,29 @@ int security_task_create(unsigned long clone_flags)
 	return security_ops->task_create(clone_flags);
 }
 
-int security_task_alloc(struct task_struct *p)
+void security_cred_free(struct cred *cred)
 {
-	return security_ops->task_alloc_security(p);
+	security_ops->cred_free(cred);
 }
 
-void security_task_free(struct task_struct *p)
+int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
 {
-	security_ops->task_free_security(p);
+	return security_ops->cred_prepare(new, old, gfp);
+}
+
+void security_commit_creds(struct cred *new, const struct cred *old)
+{
+	security_ops->cred_commit(new, old);
+}
+
+int security_kernel_act_as(struct cred *new, u32 secid)
+{
+	return security_ops->kernel_act_as(new, secid);
+}
+
+int security_kernel_create_files_as(struct cred *new, struct inode *inode)
+{
+	return security_ops->kernel_create_files_as(new, inode);
 }
 
 int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
@@ -628,10 +631,10 @@ int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
 	return security_ops->task_setuid(id0, id1, id2, flags);
 }
 
-int security_task_post_setuid(uid_t old_ruid, uid_t old_euid,
-			       uid_t old_suid, int flags)
+int security_task_fix_setuid(struct cred *new, const struct cred *old,
+			     int flags)
 {
-	return security_ops->task_post_setuid(old_ruid, old_euid, old_suid, flags);
+	return security_ops->task_fix_setuid(new, old, flags);
 }
 
 int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
@@ -713,14 +716,9 @@ int security_task_wait(struct task_struct *p)
 }
 
 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-			 unsigned long arg4, unsigned long arg5, long *rc_p)
-{
-	return security_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
-}
-
-void security_task_reparent_to_init(struct task_struct *p)
+			 unsigned long arg4, unsigned long arg5)
 {
-	security_ops->task_reparent_to_init(p);
+	return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 }
 
 void security_task_to_inode(struct task_struct *p, struct inode *inode)
@@ -1120,9 +1118,10 @@ EXPORT_SYMBOL(security_skb_classify_flow);
 
 #ifdef CONFIG_KEYS
 
-int security_key_alloc(struct key *key, struct task_struct *tsk, unsigned long flags)
+int security_key_alloc(struct key *key, const struct cred *cred,
+		       unsigned long flags)
 {
-	return security_ops->key_alloc(key, tsk, flags);
+	return security_ops->key_alloc(key, cred, flags);
 }
 
 void security_key_free(struct key *key)
@@ -1131,9 +1130,9 @@ void security_key_free(struct key *key)
 }
 
 int security_key_permission(key_ref_t key_ref,
-			    struct task_struct *context, key_perm_t perm)
+			    const struct cred *cred, key_perm_t perm)
 {
-	return security_ops->key_permission(key_ref, context, perm);
+	return security_ops->key_permission(key_ref, cred, perm);
 }
 
 int security_key_getsecurity(struct key *key, char **_buffer)
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index cb30c7e350b..d43bd6baeea 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -495,7 +495,7 @@ static inline void avc_print_ipv6_addr(struct audit_buffer *ab,
 				       char *name1, char *name2)
 {
 	if (!ipv6_addr_any(addr))
-		audit_log_format(ab, " %s=" NIP6_FMT, name1, NIP6(*addr));
+		audit_log_format(ab, " %s=%pI6", name1, addr);
 	if (port)
 		audit_log_format(ab, " %s=%d", name2, ntohs(port));
 }
@@ -504,7 +504,7 @@ static inline void avc_print_ipv4_addr(struct audit_buffer *ab, __be32 addr,
 				       __be16 port, char *name1, char *name2)
 {
 	if (addr)
-		audit_log_format(ab, " %s=" NIPQUAD_FMT, name1, NIPQUAD(addr));
+		audit_log_format(ab, " %s=%pI4", name1, &addr);
 	if (port)
 		audit_log_format(ab, " %s=%d", name2, ntohs(port));
 }
diff --git a/security/selinux/exports.c b/security/selinux/exports.c
index 64af2d3409e..c73aeaa008e 100644
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
@@ -39,9 +39,13 @@ EXPORT_SYMBOL_GPL(selinux_string_to_sid);
 int selinux_secmark_relabel_packet_permission(u32 sid)
 {
 	if (selinux_enabled) {
-		struct task_security_struct *tsec = current->security;
+		const struct task_security_struct *__tsec;
+		u32 tsid;
 
-		return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
+		__tsec = current_security();
+		tsid = __tsec->sid;
+
+		return avc_has_perm(tsid, sid, SECCLASS_PACKET,
 				    PACKET__RELABELTO, NULL);
 	}
 	return 0;
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f85597a4d73..dbeaa783b2a 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -156,33 +156,62 @@ static int selinux_secmark_enabled(void)
 	return (atomic_read(&selinux_secmark_refcount) > 0);
 }
 
-/* Allocate and free functions for each kind of security blob. */
-
-static int task_alloc_security(struct task_struct *task)
+/*
+ * initialise the security for the init task
+ */
+static void cred_init_security(void)
 {
+	struct cred *cred = (struct cred *) current->real_cred;
 	struct task_security_struct *tsec;
 
 	tsec = kzalloc(sizeof(struct task_security_struct), GFP_KERNEL);
 	if (!tsec)
-		return -ENOMEM;
+		panic("SELinux:  Failed to initialize initial task.\n");
 
-	tsec->osid = tsec->sid = SECINITSID_UNLABELED;
-	task->security = tsec;
+	tsec->osid = tsec->sid = SECINITSID_KERNEL;
+	cred->security = tsec;
+}
 
-	return 0;
+/*
+ * get the security ID of a set of credentials
+ */
+static inline u32 cred_sid(const struct cred *cred)
+{
+	const struct task_security_struct *tsec;
+
+	tsec = cred->security;
+	return tsec->sid;
 }
 
-static void task_free_security(struct task_struct *task)
+/*
+ * get the objective security ID of a task
+ */
+static inline u32 task_sid(const struct task_struct *task)
 {
-	struct task_security_struct *tsec = task->security;
-	task->security = NULL;
-	kfree(tsec);
+	u32 sid;
+
+	rcu_read_lock();
+	sid = cred_sid(__task_cred(task));
+	rcu_read_unlock();
+	return sid;
+}
+
+/*
+ * get the subjective security ID of the current task
+ */
+static inline u32 current_sid(void)
+{
+	const struct task_security_struct *tsec = current_cred()->security;
+
+	return tsec->sid;
 }
 
+/* Allocate and free functions for each kind of security blob. */
+
 static int inode_alloc_security(struct inode *inode)
 {
-	struct task_security_struct *tsec = current->security;
 	struct inode_security_struct *isec;
+	u32 sid = current_sid();
 
 	isec = kmem_cache_zalloc(sel_inode_cache, GFP_NOFS);
 	if (!isec)
@@ -193,7 +222,7 @@ static int inode_alloc_security(struct inode *inode)
 	isec->inode = inode;
 	isec->sid = SECINITSID_UNLABELED;
 	isec->sclass = SECCLASS_FILE;
-	isec->task_sid = tsec->sid;
+	isec->task_sid = sid;
 	inode->i_security = isec;
 
 	return 0;
@@ -215,15 +244,15 @@ static void inode_free_security(struct inode *inode)
 
 static int file_alloc_security(struct file *file)
 {
-	struct task_security_struct *tsec = current->security;
 	struct file_security_struct *fsec;
+	u32 sid = current_sid();
 
 	fsec = kzalloc(sizeof(struct file_security_struct), GFP_KERNEL);
 	if (!fsec)
 		return -ENOMEM;
 
-	fsec->sid = tsec->sid;
-	fsec->fown_sid = tsec->sid;
+	fsec->sid = sid;
+	fsec->fown_sid = sid;
 	file->f_security = fsec;
 
 	return 0;
@@ -338,8 +367,9 @@ static const match_table_t tokens = {
 
 static int may_context_mount_sb_relabel(u32 sid,
 			struct superblock_security_struct *sbsec,
-			struct task_security_struct *tsec)
+			const struct cred *cred)
 {
+	const struct task_security_struct *tsec = cred->security;
 	int rc;
 
 	rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
@@ -354,8 +384,9 @@ static int may_context_mount_sb_relabel(u32 sid,
 
 static int may_context_mount_inode_relabel(u32 sid,
 			struct superblock_security_struct *sbsec,
-			struct task_security_struct *tsec)
+			const struct cred *cred)
 {
+	const struct task_security_struct *tsec = cred->security;
 	int rc;
 	rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
 			  FILESYSTEM__RELABELFROM, NULL);
@@ -553,8 +584,8 @@ static int bad_option(struct superblock_security_struct *sbsec, char flag,
 static int selinux_set_mnt_opts(struct super_block *sb,
 				struct security_mnt_opts *opts)
 {
+	const struct cred *cred = current_cred();
 	int rc = 0, i;
-	struct task_security_struct *tsec = current->security;
 	struct superblock_security_struct *sbsec = sb->s_security;
 	const char *name = sb->s_type->name;
 	struct inode *inode = sbsec->sb->s_root->d_inode;
@@ -671,7 +702,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 		sbsec->proc = 1;
 
 	/* Determine the labeling behavior to use for this filesystem type. */
-	rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
+	rc = security_fs_use(sbsec->proc ? "proc" : sb->s_type->name, &sbsec->behavior, &sbsec->sid);
 	if (rc) {
 		printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
 		       __func__, sb->s_type->name, rc);
@@ -680,8 +711,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
 	/* sets the context of the superblock for the fs being mounted. */
 	if (fscontext_sid) {
-
-		rc = may_context_mount_sb_relabel(fscontext_sid, sbsec, tsec);
+		rc = may_context_mount_sb_relabel(fscontext_sid, sbsec, cred);
 		if (rc)
 			goto out;
 
@@ -695,12 +725,14 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	 */
 	if (context_sid) {
 		if (!fscontext_sid) {
-			rc = may_context_mount_sb_relabel(context_sid, sbsec, tsec);
+			rc = may_context_mount_sb_relabel(context_sid, sbsec,
+							  cred);
 			if (rc)
 				goto out;
 			sbsec->sid = context_sid;
 		} else {
-			rc = may_context_mount_inode_relabel(context_sid, sbsec, tsec);
+			rc = may_context_mount_inode_relabel(context_sid, sbsec,
+							     cred);
 			if (rc)
 				goto out;
 		}
@@ -712,7 +744,8 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	}
 
 	if (rootcontext_sid) {
-		rc = may_context_mount_inode_relabel(rootcontext_sid, sbsec, tsec);
+		rc = may_context_mount_inode_relabel(rootcontext_sid, sbsec,
+						     cred);
 		if (rc)
 			goto out;
 
@@ -730,7 +763,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
 		if (defcontext_sid != sbsec->def_sid) {
 			rc = may_context_mount_inode_relabel(defcontext_sid,
-							     sbsec, tsec);
+							     sbsec, cred);
 			if (rc)
 				goto out;
 		}
@@ -1345,18 +1378,53 @@ static inline u32 signal_to_av(int sig)
 	return perm;
 }
 
-/* Check permission betweeen a pair of tasks, e.g. signal checks,
-   fork check, ptrace check, etc. */
-static int task_has_perm(struct task_struct *tsk1,
-			 struct task_struct *tsk2,
+/*
+ * Check permission between a pair of credentials
+ * fork check, ptrace check, etc.
+ */
+static int cred_has_perm(const struct cred *actor,
+			 const struct cred *target,
 			 u32 perms)
 {
-	struct task_security_struct *tsec1, *tsec2;
+	u32 asid = cred_sid(actor), tsid = cred_sid(target);
 
-	tsec1 = tsk1->security;
-	tsec2 = tsk2->security;
-	return avc_has_perm(tsec1->sid, tsec2->sid,
-			    SECCLASS_PROCESS, perms, NULL);
+	return avc_has_perm(asid, tsid, SECCLASS_PROCESS, perms, NULL);
+}
+
+/*
+ * Check permission between a pair of tasks, e.g. signal checks,
+ * fork check, ptrace check, etc.
+ * tsk1 is the actor and tsk2 is the target
+ * - this uses the default subjective creds of tsk1
+ */
+static int task_has_perm(const struct task_struct *tsk1,
+			 const struct task_struct *tsk2,
+			 u32 perms)
+{
+	const struct task_security_struct *__tsec1, *__tsec2;
+	u32 sid1, sid2;
+
+	rcu_read_lock();
+	__tsec1 = __task_cred(tsk1)->security;	sid1 = __tsec1->sid;
+	__tsec2 = __task_cred(tsk2)->security;	sid2 = __tsec2->sid;
+	rcu_read_unlock();
+	return avc_has_perm(sid1, sid2, SECCLASS_PROCESS, perms, NULL);
+}
+
+/*
+ * Check permission between current and another task, e.g. signal checks,
+ * fork check, ptrace check, etc.
+ * current is the actor and tsk2 is the target
+ * - this uses current's subjective creds
+ */
+static int current_has_perm(const struct task_struct *tsk,
+			    u32 perms)
+{
+	u32 sid, tsid;
+
+	sid = current_sid();
+	tsid = task_sid(tsk);
+	return avc_has_perm(sid, tsid, SECCLASS_PROCESS, perms, NULL);
 }
 
 #if CAP_LAST_CAP > 63
@@ -1365,14 +1433,14 @@ static int task_has_perm(struct task_struct *tsk1,
 
 /* Check whether a task is allowed to use a capability. */
 static int task_has_capability(struct task_struct *tsk,
-			       int cap)
+			       int cap, int audit)
 {
-	struct task_security_struct *tsec;
 	struct avc_audit_data ad;
+	struct av_decision avd;
 	u16 sclass;
+	u32 sid = task_sid(tsk);
 	u32 av = CAP_TO_MASK(cap);
-
-	tsec = tsk->security;
+	int rc;
 
 	AVC_AUDIT_DATA_INIT(&ad, CAP);
 	ad.tsk = tsk;
@@ -1390,37 +1458,39 @@ static int task_has_capability(struct task_struct *tsk,
 		       "SELinux:  out of range capability %d\n", cap);
 		BUG();
 	}
-	return avc_has_perm(tsec->sid, tsec->sid, sclass, av, &ad);
+
+	rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd);
+	if (audit == SECURITY_CAP_AUDIT)
+		avc_audit(sid, sid, sclass, av, &avd, rc, &ad);
+	return rc;
 }
 
 /* Check whether a task is allowed to use a system operation. */
 static int task_has_system(struct task_struct *tsk,
 			   u32 perms)
 {
-	struct task_security_struct *tsec;
-
-	tsec = tsk->security;
+	u32 sid = task_sid(tsk);
 
-	return avc_has_perm(tsec->sid, SECINITSID_KERNEL,
+	return avc_has_perm(sid, SECINITSID_KERNEL,
 			    SECCLASS_SYSTEM, perms, NULL);
 }
 
 /* Check whether a task has a particular permission to an inode.
    The 'adp' parameter is optional and allows other audit
    data to be passed (e.g. the dentry). */
-static int inode_has_perm(struct task_struct *tsk,
+static int inode_has_perm(const struct cred *cred,
 			  struct inode *inode,
 			  u32 perms,
 			  struct avc_audit_data *adp)
 {
-	struct task_security_struct *tsec;
 	struct inode_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid;
 
 	if (unlikely(IS_PRIVATE(inode)))
 		return 0;
 
-	tsec = tsk->security;
+	sid = cred_sid(cred);
 	isec = inode->i_security;
 
 	if (!adp) {
@@ -1429,23 +1499,24 @@ static int inode_has_perm(struct task_struct *tsk,
 		ad.u.fs.inode = inode;
 	}
 
-	return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, adp);
+	return avc_has_perm(sid, isec->sid, isec->sclass, perms, adp);
 }
 
 /* Same as inode_has_perm, but pass explicit audit data containing
    the dentry to help the auditing code to more easily generate the
    pathname if needed. */
-static inline int dentry_has_perm(struct task_struct *tsk,
+static inline int dentry_has_perm(const struct cred *cred,
 				  struct vfsmount *mnt,
 				  struct dentry *dentry,
 				  u32 av)
 {
 	struct inode *inode = dentry->d_inode;
 	struct avc_audit_data ad;
+
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path.mnt = mnt;
 	ad.u.fs.path.dentry = dentry;
-	return inode_has_perm(tsk, inode, av, &ad);
+	return inode_has_perm(cred, inode, av, &ad);
 }
 
 /* Check whether a task can use an open file descriptor to
@@ -1456,33 +1527,35 @@ static inline int dentry_has_perm(struct task_struct *tsk,
    has the same SID as the process.  If av is zero, then
    access to the file is not checked, e.g. for cases
    where only the descriptor is affected like seek. */
-static int file_has_perm(struct task_struct *tsk,
-				struct file *file,
-				u32 av)
+static int file_has_perm(const struct cred *cred,
+			 struct file *file,
+			 u32 av)
 {
-	struct task_security_struct *tsec = tsk->security;
 	struct file_security_struct *fsec = file->f_security;
 	struct inode *inode = file->f_path.dentry->d_inode;
 	struct avc_audit_data ad;
+	u32 sid = cred_sid(cred);
 	int rc;
 
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path = file->f_path;
 
-	if (tsec->sid != fsec->sid) {
-		rc = avc_has_perm(tsec->sid, fsec->sid,
+	if (sid != fsec->sid) {
+		rc = avc_has_perm(sid, fsec->sid,
 				  SECCLASS_FD,
 				  FD__USE,
 				  &ad);
 		if (rc)
-			return rc;
+			goto out;
 	}
 
 	/* av is zero if only checking access to the descriptor. */
+	rc = 0;
 	if (av)
-		return inode_has_perm(tsk, inode, av, &ad);
+		rc = inode_has_perm(cred, inode, av, &ad);
 
-	return 0;
+out:
+	return rc;
 }
 
 /* Check whether a task can create a file. */
@@ -1490,36 +1563,36 @@ static int may_create(struct inode *dir,
 		      struct dentry *dentry,
 		      u16 tclass)
 {
-	struct task_security_struct *tsec;
+	const struct cred *cred = current_cred();
+	const struct task_security_struct *tsec = cred->security;
 	struct inode_security_struct *dsec;
 	struct superblock_security_struct *sbsec;
-	u32 newsid;
+	u32 sid, newsid;
 	struct avc_audit_data ad;
 	int rc;
 
-	tsec = current->security;
 	dsec = dir->i_security;
 	sbsec = dir->i_sb->s_security;
 
+	sid = tsec->sid;
+	newsid = tsec->create_sid;
+
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path.dentry = dentry;
 
-	rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR,
+	rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
 			  DIR__ADD_NAME | DIR__SEARCH,
 			  &ad);
 	if (rc)
 		return rc;
 
-	if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
-		newsid = tsec->create_sid;
-	} else {
-		rc = security_transition_sid(tsec->sid, dsec->sid, tclass,
-					     &newsid);
+	if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+		rc = security_transition_sid(sid, dsec->sid, tclass, &newsid);
 		if (rc)
 			return rc;
 	}
 
-	rc = avc_has_perm(tsec->sid, newsid, tclass, FILE__CREATE, &ad);
+	rc = avc_has_perm(sid, newsid, tclass, FILE__CREATE, &ad);
 	if (rc)
 		return rc;
 
@@ -1532,11 +1605,9 @@ static int may_create(struct inode *dir,
 static int may_create_key(u32 ksid,
 			  struct task_struct *ctx)
 {
-	struct task_security_struct *tsec;
-
-	tsec = ctx->security;
+	u32 sid = task_sid(ctx);
 
-	return avc_has_perm(tsec->sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL);
+	return avc_has_perm(sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL);
 }
 
 #define MAY_LINK	0
@@ -1549,13 +1620,12 @@ static int may_link(struct inode *dir,
 		    int kind)
 
 {
-	struct task_security_struct *tsec;
 	struct inode_security_struct *dsec, *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	u32 av;
 	int rc;
 
-	tsec = current->security;
 	dsec = dir->i_security;
 	isec = dentry->d_inode->i_security;
 
@@ -1564,7 +1634,7 @@ static int may_link(struct inode *dir,
 
 	av = DIR__SEARCH;
 	av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
-	rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR, av, &ad);
+	rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR, av, &ad);
 	if (rc)
 		return rc;
 
@@ -1584,7 +1654,7 @@ static int may_link(struct inode *dir,
 		return 0;
 	}
 
-	rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass, av, &ad);
+	rc = avc_has_perm(sid, isec->sid, isec->sclass, av, &ad);
 	return rc;
 }
 
@@ -1593,14 +1663,13 @@ static inline int may_rename(struct inode *old_dir,
 			     struct inode *new_dir,
 			     struct dentry *new_dentry)
 {
-	struct task_security_struct *tsec;
 	struct inode_security_struct *old_dsec, *new_dsec, *old_isec, *new_isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	u32 av;
 	int old_is_dir, new_is_dir;
 	int rc;
 
-	tsec = current->security;
 	old_dsec = old_dir->i_security;
 	old_isec = old_dentry->d_inode->i_security;
 	old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
@@ -1609,16 +1678,16 @@ static inline int may_rename(struct inode *old_dir,
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 
 	ad.u.fs.path.dentry = old_dentry;
-	rc = avc_has_perm(tsec->sid, old_dsec->sid, SECCLASS_DIR,
+	rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR,
 			  DIR__REMOVE_NAME | DIR__SEARCH, &ad);
 	if (rc)
 		return rc;
-	rc = avc_has_perm(tsec->sid, old_isec->sid,
+	rc = avc_has_perm(sid, old_isec->sid,
 			  old_isec->sclass, FILE__RENAME, &ad);
 	if (rc)
 		return rc;
 	if (old_is_dir && new_dir != old_dir) {
-		rc = avc_has_perm(tsec->sid, old_isec->sid,
+		rc = avc_has_perm(sid, old_isec->sid,
 				  old_isec->sclass, DIR__REPARENT, &ad);
 		if (rc)
 			return rc;
@@ -1628,13 +1697,13 @@ static inline int may_rename(struct inode *old_dir,
 	av = DIR__ADD_NAME | DIR__SEARCH;
 	if (new_dentry->d_inode)
 		av |= DIR__REMOVE_NAME;
-	rc = avc_has_perm(tsec->sid, new_dsec->sid, SECCLASS_DIR, av, &ad);
+	rc = avc_has_perm(sid, new_dsec->sid, SECCLASS_DIR, av, &ad);
 	if (rc)
 		return rc;
 	if (new_dentry->d_inode) {
 		new_isec = new_dentry->d_inode->i_security;
 		new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
-		rc = avc_has_perm(tsec->sid, new_isec->sid,
+		rc = avc_has_perm(sid, new_isec->sid,
 				  new_isec->sclass,
 				  (new_is_dir ? DIR__RMDIR : FILE__UNLINK), &ad);
 		if (rc)
@@ -1645,18 +1714,16 @@ static inline int may_rename(struct inode *old_dir,
 }
 
 /* Check whether a task can perform a filesystem operation. */
-static int superblock_has_perm(struct task_struct *tsk,
+static int superblock_has_perm(const struct cred *cred,
 			       struct super_block *sb,
 			       u32 perms,
 			       struct avc_audit_data *ad)
 {
-	struct task_security_struct *tsec;
 	struct superblock_security_struct *sbsec;
+	u32 sid = cred_sid(cred);
 
-	tsec = tsk->security;
 	sbsec = sb->s_security;
-	return avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
-			    perms, ad);
+	return avc_has_perm(sid, sbsec->sid, SECCLASS_FILESYSTEM, perms, ad);
 }
 
 /* Convert a Linux mode and permission mask to an access vector. */
@@ -1687,15 +1754,39 @@ static inline u32 file_mask_to_av(int mode, int mask)
 	return av;
 }
 
+/* Convert a Linux file to an access vector. */
+static inline u32 file_to_av(struct file *file)
+{
+	u32 av = 0;
+
+	if (file->f_mode & FMODE_READ)
+		av |= FILE__READ;
+	if (file->f_mode & FMODE_WRITE) {
+		if (file->f_flags & O_APPEND)
+			av |= FILE__APPEND;
+		else
+			av |= FILE__WRITE;
+	}
+	if (!av) {
+		/*
+		 * Special file opened with flags 3 for ioctl-only use.
+		 */
+		av = FILE__IOCTL;
+	}
+
+	return av;
+}
+
 /*
- * Convert a file mask to an access vector and include the correct open
+ * Convert a file to an access vector and include the correct open
  * open permission.
  */
-static inline u32 open_file_mask_to_av(int mode, int mask)
+static inline u32 open_file_to_av(struct file *file)
 {
-	u32 av = file_mask_to_av(mode, mask);
+	u32 av = file_to_av(file);
 
 	if (selinux_policycap_openperm) {
+		mode_t mode = file->f_path.dentry->d_inode->i_mode;
 		/*
 		 * lnk files and socks do not really have an 'open'
 		 */
@@ -1711,31 +1802,8 @@ static inline u32 open_file_mask_to_av(int mode, int mask)
 			av |= DIR__OPEN;
 		else
 			printk(KERN_ERR "SELinux: WARNING: inside %s with "
-				"unknown mode:%x\n", __func__, mode);
-	}
-	return av;
-}
-
-/* Convert a Linux file to an access vector. */
-static inline u32 file_to_av(struct file *file)
-{
-	u32 av = 0;
-
-	if (file->f_mode & FMODE_READ)
-		av |= FILE__READ;
-	if (file->f_mode & FMODE_WRITE) {
-		if (file->f_flags & O_APPEND)
-			av |= FILE__APPEND;
-		else
-			av |= FILE__WRITE;
+				"unknown mode:%o\n", __func__, mode);
 	}
-	if (!av) {
-		/*
-		 * Special file opened with flags 3 for ioctl-only use.
-		 */
-		av = FILE__IOCTL;
-	}
-
 	return av;
 }
 
@@ -1751,13 +1819,12 @@ static int selinux_ptrace_may_access(struct task_struct *child,
 		return rc;
 
 	if (mode == PTRACE_MODE_READ) {
-		struct task_security_struct *tsec = current->security;
-		struct task_security_struct *csec = child->security;
-		return avc_has_perm(tsec->sid, csec->sid,
-				    SECCLASS_FILE, FILE__READ, NULL);
+		u32 sid = current_sid();
+		u32 csid = task_sid(child);
+		return avc_has_perm(sid, csid, SECCLASS_FILE, FILE__READ, NULL);
 	}
 
-	return task_has_perm(current, child, PROCESS__PTRACE);
+	return current_has_perm(child, PROCESS__PTRACE);
 }
 
 static int selinux_ptrace_traceme(struct task_struct *parent)
@@ -1776,40 +1843,37 @@ static int selinux_capget(struct task_struct *target, kernel_cap_t *effective,
 {
 	int error;
 
-	error = task_has_perm(current, target, PROCESS__GETCAP);
+	error = current_has_perm(target, PROCESS__GETCAP);
 	if (error)
 		return error;
 
 	return secondary_ops->capget(target, effective, inheritable, permitted);
 }
 
-static int selinux_capset_check(struct task_struct *target, kernel_cap_t *effective,
-				kernel_cap_t *inheritable, kernel_cap_t *permitted)
+static int selinux_capset(struct cred *new, const struct cred *old,
+			  const kernel_cap_t *effective,
+			  const kernel_cap_t *inheritable,
+			  const kernel_cap_t *permitted)
 {
 	int error;
 
-	error = secondary_ops->capset_check(target, effective, inheritable, permitted);
+	error = secondary_ops->capset(new, old,
+				      effective, inheritable, permitted);
 	if (error)
 		return error;
 
-	return task_has_perm(current, target, PROCESS__SETCAP);
-}
-
-static void selinux_capset_set(struct task_struct *target, kernel_cap_t *effective,
-			       kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-	secondary_ops->capset_set(target, effective, inheritable, permitted);
+	return cred_has_perm(old, new, PROCESS__SETCAP);
 }
 
-static int selinux_capable(struct task_struct *tsk, int cap)
+static int selinux_capable(struct task_struct *tsk, int cap, int audit)
 {
 	int rc;
 
-	rc = secondary_ops->capable(tsk, cap);
+	rc = secondary_ops->capable(tsk, cap, audit);
 	if (rc)
 		return rc;
 
-	return task_has_capability(tsk, cap);
+	return task_has_capability(tsk, cap, audit);
 }
 
 static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
@@ -1857,15 +1921,14 @@ static int selinux_sysctl(ctl_table *table, int op)
 {
 	int error = 0;
 	u32 av;
-	struct task_security_struct *tsec;
-	u32 tsid;
+	u32 tsid, sid;
 	int rc;
 
 	rc = secondary_ops->sysctl(table, op);
 	if (rc)
 		return rc;
 
-	tsec = current->security;
+	sid = current_sid();
 
 	rc = selinux_sysctl_get_sid(table, (op == 0001) ?
 				    SECCLASS_DIR : SECCLASS_FILE, &tsid);
@@ -1877,7 +1940,7 @@ static int selinux_sysctl(ctl_table *table, int op)
 	/* The op values are "defined" in sysctl.c, thereby creating
 	 * a bad coupling between this module and sysctl.c */
 	if (op == 001) {
-		error = avc_has_perm(tsec->sid, tsid,
+		error = avc_has_perm(sid, tsid,
 				     SECCLASS_DIR, DIR__SEARCH, NULL);
 	} else {
 		av = 0;
@@ -1886,7 +1949,7 @@ static int selinux_sysctl(ctl_table *table, int op)
 		if (op & 002)
 			av |= FILE__WRITE;
 		if (av)
-			error = avc_has_perm(tsec->sid, tsid,
+			error = avc_has_perm(sid, tsid,
 					     SECCLASS_FILE, av, NULL);
 	}
 
@@ -1895,6 +1958,7 @@ static int selinux_sysctl(ctl_table *table, int op)
 
 static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 {
+	const struct cred *cred = current_cred();
 	int rc = 0;
 
 	if (!sb)
@@ -1906,14 +1970,12 @@ static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 	case Q_QUOTAOFF:
 	case Q_SETINFO:
 	case Q_SETQUOTA:
-		rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAMOD,
-					 NULL);
+		rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAMOD, NULL);
 		break;
 	case Q_GETFMT:
 	case Q_GETINFO:
 	case Q_GETQUOTA:
-		rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAGET,
-					 NULL);
+		rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAGET, NULL);
 		break;
 	default:
 		rc = 0;  /* let the kernel handle invalid cmds */
@@ -1924,7 +1986,9 @@ static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 
 static int selinux_quota_on(struct dentry *dentry)
 {
-	return dentry_has_perm(current, NULL, dentry, FILE__QUOTAON);
+	const struct cred *cred = current_cred();
+
+	return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON);
 }
 
 static int selinux_syslog(int type)
@@ -1972,16 +2036,8 @@ static int selinux_syslog(int type)
 static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 {
 	int rc, cap_sys_admin = 0;
-	struct task_security_struct *tsec = current->security;
-
-	rc = secondary_ops->capable(current, CAP_SYS_ADMIN);
-	if (rc == 0)
-		rc = avc_has_perm_noaudit(tsec->sid, tsec->sid,
-					  SECCLASS_CAPABILITY,
-					  CAP_TO_MASK(CAP_SYS_ADMIN),
-					  0,
-					  NULL);
 
+	rc = selinux_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT);
 	if (rc == 0)
 		cap_sys_admin = 1;
 
@@ -1990,59 +2046,45 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 
 /* binprm security operations */
 
-static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
+static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 {
-	struct bprm_security_struct *bsec;
-
-	bsec = kzalloc(sizeof(struct bprm_security_struct), GFP_KERNEL);
-	if (!bsec)
-		return -ENOMEM;
-
-	bsec->sid = SECINITSID_UNLABELED;
-	bsec->set = 0;
-
-	bprm->security = bsec;
-	return 0;
-}
-
-static int selinux_bprm_set_security(struct linux_binprm *bprm)
-{
-	struct task_security_struct *tsec;
-	struct inode *inode = bprm->file->f_path.dentry->d_inode;
+	const struct task_security_struct *old_tsec;
+	struct task_security_struct *new_tsec;
 	struct inode_security_struct *isec;
-	struct bprm_security_struct *bsec;
-	u32 newsid;
 	struct avc_audit_data ad;
+	struct inode *inode = bprm->file->f_path.dentry->d_inode;
 	int rc;
 
-	rc = secondary_ops->bprm_set_security(bprm);
+	rc = secondary_ops->bprm_set_creds(bprm);
 	if (rc)
 		return rc;
 
-	bsec = bprm->security;
-
-	if (bsec->set)
+	/* SELinux context only depends on initial program or script and not
+	 * the script interpreter */
+	if (bprm->cred_prepared)
 		return 0;
 
-	tsec = current->security;
+	old_tsec = current_security();
+	new_tsec = bprm->cred->security;
 	isec = inode->i_security;
 
 	/* Default to the current task SID. */
-	bsec->sid = tsec->sid;
+	new_tsec->sid = old_tsec->sid;
+	new_tsec->osid = old_tsec->sid;
 
 	/* Reset fs, key, and sock SIDs on execve. */
-	tsec->create_sid = 0;
-	tsec->keycreate_sid = 0;
-	tsec->sockcreate_sid = 0;
+	new_tsec->create_sid = 0;
+	new_tsec->keycreate_sid = 0;
+	new_tsec->sockcreate_sid = 0;
 
-	if (tsec->exec_sid) {
-		newsid = tsec->exec_sid;
+	if (old_tsec->exec_sid) {
+		new_tsec->sid = old_tsec->exec_sid;
 		/* Reset exec SID on execve. */
-		tsec->exec_sid = 0;
+		new_tsec->exec_sid = 0;
 	} else {
 		/* Check for a default transition on this program. */
-		rc = security_transition_sid(tsec->sid, isec->sid,
-					     SECCLASS_PROCESS, &newsid);
+		rc = security_transition_sid(old_tsec->sid, isec->sid,
+					     SECCLASS_PROCESS, &new_tsec->sid);
 		if (rc)
 			return rc;
 	}
@@ -2051,33 +2093,63 @@ static int selinux_bprm_set_security(struct linux_binprm *bprm)
 	ad.u.fs.path = bprm->file->f_path;
 
 	if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
-		newsid = tsec->sid;
+		new_tsec->sid = old_tsec->sid;
 
-	if (tsec->sid == newsid) {
-		rc = avc_has_perm(tsec->sid, isec->sid,
+	if (new_tsec->sid == old_tsec->sid) {
+		rc = avc_has_perm(old_tsec->sid, isec->sid,
 				  SECCLASS_FILE, FILE__EXECUTE_NO_TRANS, &ad);
 		if (rc)
 			return rc;
 	} else {
 		/* Check permissions for the transition. */
-		rc = avc_has_perm(tsec->sid, newsid,
+		rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
 				  SECCLASS_PROCESS, PROCESS__TRANSITION, &ad);
 		if (rc)
 			return rc;
 
-		rc = avc_has_perm(newsid, isec->sid,
+		rc = avc_has_perm(new_tsec->sid, isec->sid,
 				  SECCLASS_FILE, FILE__ENTRYPOINT, &ad);
 		if (rc)
 			return rc;
 
-		/* Clear any possibly unsafe personality bits on exec: */
-		current->personality &= ~PER_CLEAR_ON_SETID;
+		/* Check for shared state */
+		if (bprm->unsafe & LSM_UNSAFE_SHARE) {
+			rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
+					  SECCLASS_PROCESS, PROCESS__SHARE,
+					  NULL);
+			if (rc)
+				return -EPERM;
+		}
+
+		/* Make sure that anyone attempting to ptrace over a task that
+		 * changes its SID has the appropriate permit */
+		if (bprm->unsafe &
+		    (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
+			struct task_struct *tracer;
+			struct task_security_struct *sec;
+			u32 ptsid = 0;
 
-		/* Set the security field to the new SID. */
-		bsec->sid = newsid;
+			rcu_read_lock();
+			tracer = tracehook_tracer_task(current);
+			if (likely(tracer != NULL)) {
+				sec = __task_cred(tracer)->security;
+				ptsid = sec->sid;
+			}
+			rcu_read_unlock();
+
+			if (ptsid != 0) {
+				rc = avc_has_perm(ptsid, new_tsec->sid,
+						  SECCLASS_PROCESS,
+						  PROCESS__PTRACE, NULL);
+				if (rc)
+					return -EPERM;
+			}
+		}
+
+		/* Clear any possibly unsafe personality bits on exec: */
+		bprm->per_clear |= PER_CLEAR_ON_SETID;
 	}
 
-	bsec->set = 1;
 	return 0;
 }
 
@@ -2086,35 +2158,34 @@ static int selinux_bprm_check_security(struct linux_binprm *bprm)
 	return secondary_ops->bprm_check_security(bprm);
 }
 
-
 static int selinux_bprm_secureexec(struct linux_binprm *bprm)
 {
-	struct task_security_struct *tsec = current->security;
+	const struct cred *cred = current_cred();
+	const struct task_security_struct *tsec = cred->security;
+	u32 sid, osid;
 	int atsecure = 0;
 
-	if (tsec->osid != tsec->sid) {
+	sid = tsec->sid;
+	osid = tsec->osid;
+
+	if (osid != sid) {
 		/* Enable secure mode for SIDs transitions unless
 		   the noatsecure permission is granted between
 		   the two SIDs, i.e. ahp returns 0. */
-		atsecure = avc_has_perm(tsec->osid, tsec->sid,
-					 SECCLASS_PROCESS,
-					 PROCESS__NOATSECURE, NULL);
+		atsecure = avc_has_perm(osid, sid,
+					SECCLASS_PROCESS,
+					PROCESS__NOATSECURE, NULL);
 	}
 
 	return (atsecure || secondary_ops->bprm_secureexec(bprm));
 }
 
-static void selinux_bprm_free_security(struct linux_binprm *bprm)
-{
-	kfree(bprm->security);
-	bprm->security = NULL;
-}
-
 extern struct vfsmount *selinuxfs_mount;
 extern struct dentry *selinux_null;
 
 /* Derived from fs/exec.c:flush_old_files. */
-static inline void flush_unauthorized_files(struct files_struct *files)
+static inline void flush_unauthorized_files(const struct cred *cred,
+					    struct files_struct *files)
 {
 	struct avc_audit_data ad;
 	struct file *file, *devnull = NULL;
@@ -2136,7 +2207,7 @@ static inline void flush_unauthorized_files(struct files_struct *files)
 			   interested in the inode-based check here. */
 			file = list_first_entry(&tty->tty_files, struct file, f_u.fu_list);
 			inode = file->f_path.dentry->d_inode;
-			if (inode_has_perm(current, inode,
+			if (inode_has_perm(cred, inode,
 					   FILE__READ | FILE__WRITE, NULL)) {
 				drop_tty = 1;
 			}
@@ -2171,7 +2242,7 @@ static inline void flush_unauthorized_files(struct files_struct *files)
 				file = fget(i);
 				if (!file)
 					continue;
-				if (file_has_perm(current,
+				if (file_has_perm(cred,
 						  file,
 						  file_to_av(file))) {
 					sys_close(i);
@@ -2185,7 +2256,10 @@ static inline void flush_unauthorized_files(struct files_struct *files)
 					if (devnull) {
 						get_file(devnull);
 					} else {
-						devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
+						devnull = dentry_open(
+							dget(selinux_null),
+							mntget(selinuxfs_mount),
+							O_RDWR, cred);
 						if (IS_ERR(devnull)) {
 							devnull = NULL;
 							put_unused_fd(fd);
@@ -2204,94 +2278,78 @@ static inline void flush_unauthorized_files(struct files_struct *files)
 	spin_unlock(&files->file_lock);
 }
 
-static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+/*
+ * Prepare a process for imminent new credential changes due to exec
+ */
+static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
 {
-	struct task_security_struct *tsec;
-	struct bprm_security_struct *bsec;
-	u32 sid;
-	int rc;
-
-	secondary_ops->bprm_apply_creds(bprm, unsafe);
-
-	tsec = current->security;
+	struct task_security_struct *new_tsec;
+	struct rlimit *rlim, *initrlim;
+	int rc, i;
 
-	bsec = bprm->security;
-	sid = bsec->sid;
+	secondary_ops->bprm_committing_creds(bprm);
 
-	tsec->osid = tsec->sid;
-	bsec->unsafe = 0;
-	if (tsec->sid != sid) {
-		/* Check for shared state.  If not ok, leave SID
-		   unchanged and kill. */
-		if (unsafe & LSM_UNSAFE_SHARE) {
-			rc = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
-					PROCESS__SHARE, NULL);
-			if (rc) {
-				bsec->unsafe = 1;
-				return;
-			}
-		}
+	new_tsec = bprm->cred->security;
+	if (new_tsec->sid == new_tsec->osid)
+		return;
 
-		/* Check for ptracing, and update the task SID if ok.
-		   Otherwise, leave SID unchanged and kill. */
-		if (unsafe & (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
-			struct task_struct *tracer;
-			struct task_security_struct *sec;
-			u32 ptsid = 0;
+	/* Close files for which the new task SID is not authorized. */
+	flush_unauthorized_files(bprm->cred, current->files);
 
-			rcu_read_lock();
-			tracer = tracehook_tracer_task(current);
-			if (likely(tracer != NULL)) {
-				sec = tracer->security;
-				ptsid = sec->sid;
-			}
-			rcu_read_unlock();
+	/* Always clear parent death signal on SID transitions. */
+	current->pdeath_signal = 0;
 
-			if (ptsid != 0) {
-				rc = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
-						  PROCESS__PTRACE, NULL);
-				if (rc) {
-					bsec->unsafe = 1;
-					return;
-				}
-			}
+	/* Check whether the new SID can inherit resource limits from the old
+	 * SID.  If not, reset all soft limits to the lower of the current
+	 * task's hard limit and the init task's soft limit.
+	 *
+	 * Note that the setting of hard limits (even to lower them) can be
+	 * controlled by the setrlimit check.  The inclusion of the init task's
+	 * soft limit into the computation is to avoid resetting soft limits
+	 * higher than the default soft limit for cases where the default is
+	 * lower than the hard limit, e.g. RLIMIT_CORE or RLIMIT_STACK.
+	 */
+	rc = avc_has_perm(new_tsec->osid, new_tsec->sid, SECCLASS_PROCESS,
+			  PROCESS__RLIMITINH, NULL);
+	if (rc) {
+		for (i = 0; i < RLIM_NLIMITS; i++) {
+			rlim = current->signal->rlim + i;
+			initrlim = init_task.signal->rlim + i;
+			rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
 		}
-		tsec->sid = sid;
+		update_rlimit_cpu(rlim->rlim_cur);
 	}
 }
 
 /*
- * called after apply_creds without the task lock held
+ * Clean up the process immediately after the installation of new credentials
+ * due to exec
  */
-static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
+static void selinux_bprm_committed_creds(struct linux_binprm *bprm)
 {
-	struct task_security_struct *tsec;
-	struct rlimit *rlim, *initrlim;
+	const struct task_security_struct *tsec = current_security();
 	struct itimerval itimer;
-	struct bprm_security_struct *bsec;
+	struct sighand_struct *psig;
+	u32 osid, sid;
 	int rc, i;
+	unsigned long flags;
 
-	tsec = current->security;
-	bsec = bprm->security;
+	secondary_ops->bprm_committed_creds(bprm);
 
-	if (bsec->unsafe) {
-		force_sig_specific(SIGKILL, current);
-		return;
-	}
-	if (tsec->osid == tsec->sid)
+	osid = tsec->osid;
+	sid = tsec->sid;
+
+	if (sid == osid)
 		return;
 
-	/* Close files for which the new task SID is not authorized. */
-	flush_unauthorized_files(current->files);
-
-	/* Check whether the new SID can inherit signal state
-	   from the old SID.  If not, clear itimers to avoid
-	   subsequent signal generation and flush and unblock
-	   signals. This must occur _after_ the task SID has
-	  been updated so that any kill done after the flush
-	  will be checked against the new SID. */
-	rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
-			  PROCESS__SIGINH, NULL);
+	/* Check whether the new SID can inherit signal state from the old SID.
+	 * If not, clear itimers to avoid subsequent signal generation and
+	 * flush and unblock signals.
+	 *
+	 * This must occur _after_ the task SID has been updated so that any
+	 * kill done after the flush will be checked against the new SID.
+	 */
+	rc = avc_has_perm(osid, sid, SECCLASS_PROCESS, PROCESS__SIGINH, NULL);
 	if (rc) {
 		memset(&itimer, 0, sizeof itimer);
 		for (i = 0; i < 3; i++)
@@ -2304,33 +2362,14 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
 		spin_unlock_irq(&current->sighand->siglock);
 	}
 
-	/* Always clear parent death signal on SID transitions. */
-	current->pdeath_signal = 0;
-
-	/* Check whether the new SID can inherit resource limits
-	   from the old SID.  If not, reset all soft limits to
-	   the lower of the current task's hard limit and the init
-	   task's soft limit.  Note that the setting of hard limits
-	   (even to lower them) can be controlled by the setrlimit
-	   check. The inclusion of the init task's soft limit into
-	   the computation is to avoid resetting soft limits higher
-	   than the default soft limit for cases where the default
-	   is lower than the hard limit, e.g. RLIMIT_CORE or
-	   RLIMIT_STACK.*/
-	rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
-			  PROCESS__RLIMITINH, NULL);
-	if (rc) {
-		for (i = 0; i < RLIM_NLIMITS; i++) {
-			rlim = current->signal->rlim + i;
-			initrlim = init_task.signal->rlim+i;
-			rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
-		}
-		update_rlimit_cpu(rlim->rlim_cur);
-	}
-
-	/* Wake up the parent if it is waiting so that it can
-	   recheck wait permission to the new task SID. */
+	/* Wake up the parent if it is waiting so that it can recheck
+	 * wait permission to the new task SID. */
+	read_lock_irq(&tasklist_lock);
+	psig = current->parent->sighand;
+	spin_lock_irqsave(&psig->siglock, flags);
 	wake_up_interruptible(&current->parent->signal->wait_chldexit);
+	spin_unlock_irqrestore(&psig->siglock, flags);
+	read_unlock_irq(&tasklist_lock);
 }
 
 /* superblock security operations */
@@ -2435,8 +2474,9 @@ out:
 	return rc;
 }
 
-static int selinux_sb_kern_mount(struct super_block *sb, void *data)
+static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
+	const struct cred *cred = current_cred();
 	struct avc_audit_data ad;
 	int rc;
 
@@ -2444,18 +2484,23 @@ static int selinux_sb_kern_mount(struct super_block *sb, void *data)
 	if (rc)
 		return rc;
 
+	/* Allow all mounts performed by the kernel */
+	if (flags & MS_KERNMOUNT)
+		return 0;
+
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path.dentry = sb->s_root;
-	return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
+	return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
 }
 
 static int selinux_sb_statfs(struct dentry *dentry)
 {
+	const struct cred *cred = current_cred();
 	struct avc_audit_data ad;
 
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path.dentry = dentry->d_sb->s_root;
-	return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
+	return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
 }
 
 static int selinux_mount(char *dev_name,
@@ -2464,6 +2509,7 @@ static int selinux_mount(char *dev_name,
 			 unsigned long flags,
 			 void *data)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->sb_mount(dev_name, path, type, flags, data);
@@ -2471,22 +2517,23 @@ static int selinux_mount(char *dev_name,
 		return rc;
 
 	if (flags & MS_REMOUNT)
-		return superblock_has_perm(current, path->mnt->mnt_sb,
+		return superblock_has_perm(cred, path->mnt->mnt_sb,
 					   FILESYSTEM__REMOUNT, NULL);
 	else
-		return dentry_has_perm(current, path->mnt, path->dentry,
+		return dentry_has_perm(cred, path->mnt, path->dentry,
 				       FILE__MOUNTON);
 }
 
 static int selinux_umount(struct vfsmount *mnt, int flags)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->sb_umount(mnt, flags);
 	if (rc)
 		return rc;
 
-	return superblock_has_perm(current, mnt->mnt_sb,
+	return superblock_has_perm(cred, mnt->mnt_sb,
 				   FILESYSTEM__UNMOUNT, NULL);
 }
 
@@ -2506,21 +2553,22 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
 				       char **name, void **value,
 				       size_t *len)
 {
-	struct task_security_struct *tsec;
+	const struct cred *cred = current_cred();
+	const struct task_security_struct *tsec = cred->security;
 	struct inode_security_struct *dsec;
 	struct superblock_security_struct *sbsec;
-	u32 newsid, clen;
+	u32 sid, newsid, clen;
 	int rc;
 	char *namep = NULL, *context;
 
-	tsec = current->security;
 	dsec = dir->i_security;
 	sbsec = dir->i_sb->s_security;
 
-	if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
-		newsid = tsec->create_sid;
-	} else {
-		rc = security_transition_sid(tsec->sid, dsec->sid,
+	sid = tsec->sid;
+	newsid = tsec->create_sid;
+
+	if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+		rc = security_transition_sid(sid, dsec->sid,
 					     inode_mode_to_security_class(inode->i_mode),
 					     &newsid);
 		if (rc) {
@@ -2623,21 +2671,25 @@ static int selinux_inode_rename(struct inode *old_inode, struct dentry *old_dent
 
 static int selinux_inode_readlink(struct dentry *dentry)
 {
-	return dentry_has_perm(current, NULL, dentry, FILE__READ);
+	const struct cred *cred = current_cred();
+
+	return dentry_has_perm(cred, NULL, dentry, FILE__READ);
 }
 
 static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->inode_follow_link(dentry, nameidata);
 	if (rc)
 		return rc;
-	return dentry_has_perm(current, NULL, dentry, FILE__READ);
+	return dentry_has_perm(cred, NULL, dentry, FILE__READ);
 }
 
 static int selinux_inode_permission(struct inode *inode, int mask)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->inode_permission(inode, mask);
@@ -2649,12 +2701,13 @@ static int selinux_inode_permission(struct inode *inode, int mask)
 		return 0;
 	}
 
-	return inode_has_perm(current, inode,
-			       open_file_mask_to_av(inode->i_mode, mask), NULL);
+	return inode_has_perm(cred, inode,
+			      file_mask_to_av(inode->i_mode, mask), NULL);
 }
 
 static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->inode_setattr(dentry, iattr);
@@ -2666,18 +2719,22 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 
 	if (iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
 			       ATTR_ATIME_SET | ATTR_MTIME_SET))
-		return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+		return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
 
-	return dentry_has_perm(current, NULL, dentry, FILE__WRITE);
+	return dentry_has_perm(cred, NULL, dentry, FILE__WRITE);
 }
 
 static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 {
-	return dentry_has_perm(current, mnt, dentry, FILE__GETATTR);
+	const struct cred *cred = current_cred();
+
+	return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
 {
+	const struct cred *cred = current_cred();
+
 	if (!strncmp(name, XATTR_SECURITY_PREFIX,
 		     sizeof XATTR_SECURITY_PREFIX - 1)) {
 		if (!strcmp(name, XATTR_NAME_CAPS)) {
@@ -2692,18 +2749,17 @@ static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
 
 	/* Not an attribute we recognize, so just check the
 	   ordinary setattr permission. */
-	return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+	return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
 }
 
 static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
 				  const void *value, size_t size, int flags)
 {
-	struct task_security_struct *tsec = current->security;
 	struct inode *inode = dentry->d_inode;
 	struct inode_security_struct *isec = inode->i_security;
 	struct superblock_security_struct *sbsec;
 	struct avc_audit_data ad;
-	u32 newsid;
+	u32 newsid, sid = current_sid();
 	int rc = 0;
 
 	if (strcmp(name, XATTR_NAME_SELINUX))
@@ -2719,7 +2775,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
 	AVC_AUDIT_DATA_INIT(&ad, FS);
 	ad.u.fs.path.dentry = dentry;
 
-	rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass,
+	rc = avc_has_perm(sid, isec->sid, isec->sclass,
 			  FILE__RELABELFROM, &ad);
 	if (rc)
 		return rc;
@@ -2733,12 +2789,12 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
 	if (rc)
 		return rc;
 
-	rc = avc_has_perm(tsec->sid, newsid, isec->sclass,
+	rc = avc_has_perm(sid, newsid, isec->sclass,
 			  FILE__RELABELTO, &ad);
 	if (rc)
 		return rc;
 
-	rc = security_validate_transition(isec->sid, newsid, tsec->sid,
+	rc = security_validate_transition(isec->sid, newsid, sid,
 					  isec->sclass);
 	if (rc)
 		return rc;
@@ -2778,12 +2834,16 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
 
 static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
 {
-	return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+	const struct cred *cred = current_cred();
+
+	return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_listxattr(struct dentry *dentry)
 {
-	return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+	const struct cred *cred = current_cred();
+
+	return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
@@ -2806,7 +2866,6 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
 	u32 size;
 	int error;
 	char *context = NULL;
-	struct task_security_struct *tsec = current->security;
 	struct inode_security_struct *isec = inode->i_security;
 
 	if (strcmp(name, XATTR_SELINUX_SUFFIX))
@@ -2821,13 +2880,7 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
 	 * and lack of permission just means that we fall back to the
 	 * in-core context value, not a denial.
 	 */
-	error = secondary_ops->capable(current, CAP_MAC_ADMIN);
-	if (!error)
-		error = avc_has_perm_noaudit(tsec->sid, tsec->sid,
-					     SECCLASS_CAPABILITY2,
-					     CAPABILITY2__MAC_ADMIN,
-					     0,
-					     NULL);
+	error = selinux_capable(current, CAP_MAC_ADMIN, SECURITY_CAP_NOAUDIT);
 	if (!error)
 		error = security_sid_to_context_force(isec->sid, &context,
 						      &size);
@@ -2894,6 +2947,7 @@ static void selinux_inode_getsecid(const struct inode *inode, u32 *secid)
 
 static int selinux_revalidate_file_permission(struct file *file, int mask)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 	struct inode *inode = file->f_path.dentry->d_inode;
 
@@ -2906,7 +2960,7 @@ static int selinux_revalidate_file_permission(struct file *file, int mask)
 	if ((file->f_flags & O_APPEND) && (mask & MAY_WRITE))
 		mask |= MAY_APPEND;
 
-	rc = file_has_perm(current, file,
+	rc = file_has_perm(cred, file,
 			   file_mask_to_av(inode->i_mode, mask));
 	if (rc)
 		return rc;
@@ -2917,16 +2971,16 @@ static int selinux_revalidate_file_permission(struct file *file, int mask)
 static int selinux_file_permission(struct file *file, int mask)
 {
 	struct inode *inode = file->f_path.dentry->d_inode;
-	struct task_security_struct *tsec = current->security;
 	struct file_security_struct *fsec = file->f_security;
 	struct inode_security_struct *isec = inode->i_security;
+	u32 sid = current_sid();
 
 	if (!mask) {
 		/* No permission to check.  Existence test. */
 		return 0;
 	}
 
-	if (tsec->sid == fsec->sid && fsec->isid == isec->sid
+	if (sid == fsec->sid && fsec->isid == isec->sid
 	    && fsec->pseqno == avc_policy_seqno())
 		return selinux_netlbl_inode_permission(inode, mask);
 
@@ -2946,6 +3000,7 @@ static void selinux_file_free_security(struct file *file)
 static int selinux_file_ioctl(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
+	const struct cred *cred = current_cred();
 	u32 av = 0;
 
 	if (_IOC_DIR(cmd) & _IOC_WRITE)
@@ -2955,11 +3010,14 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd,
 	if (!av)
 		av = FILE__IOCTL;
 
-	return file_has_perm(current, file, av);
+	return file_has_perm(cred, file, av);
 }
 
 static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
 {
+	const struct cred *cred = current_cred();
+	int rc = 0;
+
 #ifndef CONFIG_PPC32
 	if ((prot & PROT_EXEC) && (!file || (!shared && (prot & PROT_WRITE)))) {
 		/*
@@ -2967,9 +3025,9 @@ static int file_map_prot_check(struct file *file, unsigned long prot, int shared
 		 * private file mapping that will also be writable.
 		 * This has an additional check.
 		 */
-		int rc = task_has_perm(current, current, PROCESS__EXECMEM);
+		rc = cred_has_perm(cred, cred, PROCESS__EXECMEM);
 		if (rc)
-			return rc;
+			goto error;
 	}
 #endif
 
@@ -2984,9 +3042,11 @@ static int file_map_prot_check(struct file *file, unsigned long prot, int shared
 		if (prot & PROT_EXEC)
 			av |= FILE__EXECUTE;
 
-		return file_has_perm(current, file, av);
+		return file_has_perm(cred, file, av);
 	}
-	return 0;
+
+error:
+	return rc;
 }
 
 static int selinux_file_mmap(struct file *file, unsigned long reqprot,
@@ -2994,7 +3054,7 @@ static int selinux_file_mmap(struct file *file, unsigned long reqprot,
 			     unsigned long addr, unsigned long addr_only)
 {
 	int rc = 0;
-	u32 sid = ((struct task_security_struct *)(current->security))->sid;
+	u32 sid = current_sid();
 
 	if (addr < mmap_min_addr)
 		rc = avc_has_perm(sid, sid, SECCLASS_MEMPROTECT,
@@ -3013,6 +3073,7 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 				 unsigned long reqprot,
 				 unsigned long prot)
 {
+	const struct cred *cred = current_cred();
 	int rc;
 
 	rc = secondary_ops->file_mprotect(vma, reqprot, prot);
@@ -3027,12 +3088,11 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 		rc = 0;
 		if (vma->vm_start >= vma->vm_mm->start_brk &&
 		    vma->vm_end <= vma->vm_mm->brk) {
-			rc = task_has_perm(current, current,
-					   PROCESS__EXECHEAP);
+			rc = cred_has_perm(cred, cred, PROCESS__EXECHEAP);
 		} else if (!vma->vm_file &&
 			   vma->vm_start <= vma->vm_mm->start_stack &&
 			   vma->vm_end >= vma->vm_mm->start_stack) {
-			rc = task_has_perm(current, current, PROCESS__EXECSTACK);
+			rc = current_has_perm(current, PROCESS__EXECSTACK);
 		} else if (vma->vm_file && vma->anon_vma) {
 			/*
 			 * We are making executable a file mapping that has
@@ -3041,8 +3101,7 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 			 * modified content.  This typically should only
 			 * occur for text relocations.
 			 */
-			rc = file_has_perm(current, vma->vm_file,
-					   FILE__EXECMOD);
+			rc = file_has_perm(cred, vma->vm_file, FILE__EXECMOD);
 		}
 		if (rc)
 			return rc;
@@ -3054,12 +3113,15 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 
 static int selinux_file_lock(struct file *file, unsigned int cmd)
 {
-	return file_has_perm(current, file, FILE__LOCK);
+	const struct cred *cred = current_cred();
+
+	return file_has_perm(cred, file, FILE__LOCK);
 }
 
 static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
+	const struct cred *cred = current_cred();
 	int err = 0;
 
 	switch (cmd) {
@@ -3070,7 +3132,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 		}
 
 		if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
-			err = file_has_perm(current, file, FILE__WRITE);
+			err = file_has_perm(cred, file, FILE__WRITE);
 			break;
 		}
 		/* fall through */
@@ -3080,7 +3142,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 	case F_GETOWN:
 	case F_GETSIG:
 		/* Just check FD__USE permission */
-		err = file_has_perm(current, file, 0);
+		err = file_has_perm(cred, file, 0);
 		break;
 	case F_GETLK:
 	case F_SETLK:
@@ -3094,7 +3156,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 			err = -EINVAL;
 			break;
 		}
-		err = file_has_perm(current, file, FILE__LOCK);
+		err = file_has_perm(cred, file, FILE__LOCK);
 		break;
 	}
 
@@ -3103,12 +3165,10 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 
 static int selinux_file_set_fowner(struct file *file)
 {
-	struct task_security_struct *tsec;
 	struct file_security_struct *fsec;
 
-	tsec = current->security;
 	fsec = file->f_security;
-	fsec->fown_sid = tsec->sid;
+	fsec->fown_sid = current_sid();
 
 	return 0;
 }
@@ -3117,14 +3177,13 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
 				       struct fown_struct *fown, int signum)
 {
 	struct file *file;
+	u32 sid = current_sid();
 	u32 perm;
-	struct task_security_struct *tsec;
 	struct file_security_struct *fsec;
 
 	/* struct fown_struct is never outside the context of a struct file */
 	file = container_of(fown, struct file, f_owner);
 
-	tsec = tsk->security;
 	fsec = file->f_security;
 
 	if (!signum)
@@ -3132,20 +3191,23 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
 	else
 		perm = signal_to_av(signum);
 
-	return avc_has_perm(fsec->fown_sid, tsec->sid,
+	return avc_has_perm(fsec->fown_sid, sid,
 			    SECCLASS_PROCESS, perm, NULL);
 }
 
 static int selinux_file_receive(struct file *file)
 {
-	return file_has_perm(current, file, file_to_av(file));
+	const struct cred *cred = current_cred();
+
+	return file_has_perm(cred, file, file_to_av(file));
 }
 
-static int selinux_dentry_open(struct file *file)
+static int selinux_dentry_open(struct file *file, const struct cred *cred)
 {
 	struct file_security_struct *fsec;
 	struct inode *inode;
 	struct inode_security_struct *isec;
+
 	inode = file->f_path.dentry->d_inode;
 	fsec = file->f_security;
 	isec = inode->i_security;
@@ -3166,7 +3228,7 @@ static int selinux_dentry_open(struct file *file)
 	 * new inode label or new policy.
 	 * This check is not redundant - do not remove.
 	 */
-	return inode_has_perm(current, inode, file_to_av(file), NULL);
+	return inode_has_perm(cred, inode, open_file_to_av(file), NULL);
 }
 
 /* task security operations */
@@ -3179,36 +3241,88 @@ static int selinux_task_create(unsigned long clone_flags)
 	if (rc)
 		return rc;
 
-	return task_has_perm(current, current, PROCESS__FORK);
+	return current_has_perm(current, PROCESS__FORK);
 }
 
-static int selinux_task_alloc_security(struct task_struct *tsk)
+/*
+ * detach and free the LSM part of a set of credentials
+ */
+static void selinux_cred_free(struct cred *cred)
 {
-	struct task_security_struct *tsec1, *tsec2;
-	int rc;
-
-	tsec1 = current->security;
+	struct task_security_struct *tsec = cred->security;
+	cred->security = NULL;
+	kfree(tsec);
+}
 
-	rc = task_alloc_security(tsk);
-	if (rc)
-		return rc;
-	tsec2 = tsk->security;
+/*
+ * prepare a new set of credentials for modification
+ */
+static int selinux_cred_prepare(struct cred *new, const struct cred *old,
+				gfp_t gfp)
+{
+	const struct task_security_struct *old_tsec;
+	struct task_security_struct *tsec;
 
-	tsec2->osid = tsec1->osid;
-	tsec2->sid = tsec1->sid;
+	old_tsec = old->security;
 
-	/* Retain the exec, fs, key, and sock SIDs across fork */
-	tsec2->exec_sid = tsec1->exec_sid;
-	tsec2->create_sid = tsec1->create_sid;
-	tsec2->keycreate_sid = tsec1->keycreate_sid;
-	tsec2->sockcreate_sid = tsec1->sockcreate_sid;
+	tsec = kmemdup(old_tsec, sizeof(struct task_security_struct), gfp);
+	if (!tsec)
+		return -ENOMEM;
 
+	new->security = tsec;
 	return 0;
 }
 
-static void selinux_task_free_security(struct task_struct *tsk)
+/*
+ * commit new credentials
+ */
+static void selinux_cred_commit(struct cred *new, const struct cred *old)
+{
+	secondary_ops->cred_commit(new, old);
+}
+
+/*
+ * set the security data for a kernel service
+ * - all the creation contexts are set to unlabelled
+ */
+static int selinux_kernel_act_as(struct cred *new, u32 secid)
 {
-	task_free_security(tsk);
+	struct task_security_struct *tsec = new->security;
+	u32 sid = current_sid();
+	int ret;
+
+	ret = avc_has_perm(sid, secid,
+			   SECCLASS_KERNEL_SERVICE,
+			   KERNEL_SERVICE__USE_AS_OVERRIDE,
+			   NULL);
+	if (ret == 0) {
+		tsec->sid = secid;
+		tsec->create_sid = 0;
+		tsec->keycreate_sid = 0;
+		tsec->sockcreate_sid = 0;
+	}
+	return ret;
+}
+
+/*
+ * set the file creation context in a security record to the same as the
+ * objective context of the specified inode
+ */
+static int selinux_kernel_create_files_as(struct cred *new, struct inode *inode)
+{
+	struct inode_security_struct *isec = inode->i_security;
+	struct task_security_struct *tsec = new->security;
+	u32 sid = current_sid();
+	int ret;
+
+	ret = avc_has_perm(sid, isec->sid,
+			   SECCLASS_KERNEL_SERVICE,
+			   KERNEL_SERVICE__CREATE_FILES_AS,
+			   NULL);
+
+	if (ret == 0)
+		tsec->create_sid = isec->sid;
+	return 0;
 }
 
 static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
@@ -3222,9 +3336,10 @@ static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
 	return 0;
 }
 
-static int selinux_task_post_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+static int selinux_task_fix_setuid(struct cred *new, const struct cred *old,
+				   int flags)
 {
-	return secondary_ops->task_post_setuid(id0, id1, id2, flags);
+	return secondary_ops->task_fix_setuid(new, old, flags);
 }
 
 static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
@@ -3235,23 +3350,22 @@ static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
 
 static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
 {
-	return task_has_perm(current, p, PROCESS__SETPGID);
+	return current_has_perm(p, PROCESS__SETPGID);
 }
 
 static int selinux_task_getpgid(struct task_struct *p)
 {
-	return task_has_perm(current, p, PROCESS__GETPGID);
+	return current_has_perm(p, PROCESS__GETPGID);
 }
 
 static int selinux_task_getsid(struct task_struct *p)
 {
-	return task_has_perm(current, p, PROCESS__GETSESSION);
+	return current_has_perm(p, PROCESS__GETSESSION);
 }
 
 static void selinux_task_getsecid(struct task_struct *p, u32 *secid)
 {
-	struct task_security_struct *tsec = p->security;
-	*secid = tsec->sid;
+	*secid = task_sid(p);
 }
 
 static int selinux_task_setgroups(struct group_info *group_info)
@@ -3268,7 +3382,7 @@ static int selinux_task_setnice(struct task_struct *p, int nice)
 	if (rc)
 		return rc;
 
-	return task_has_perm(current, p, PROCESS__SETSCHED);
+	return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_setioprio(struct task_struct *p, int ioprio)
@@ -3279,12 +3393,12 @@ static int selinux_task_setioprio(struct task_struct *p, int ioprio)
 	if (rc)
 		return rc;
 
-	return task_has_perm(current, p, PROCESS__SETSCHED);
+	return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_getioprio(struct task_struct *p)
 {
-	return task_has_perm(current, p, PROCESS__GETSCHED);
+	return current_has_perm(p, PROCESS__GETSCHED);
 }
 
 static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
@@ -3299,9 +3413,9 @@ static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim
 	/* Control the ability to change the hard limit (whether
 	   lowering or raising it), so that the hard limit can
 	   later be used as a safe reset point for the soft limit
-	   upon context transitions. See selinux_bprm_apply_creds. */
+	   upon context transitions.  See selinux_bprm_committing_creds. */
 	if (old_rlim->rlim_max != new_rlim->rlim_max)
-		return task_has_perm(current, current, PROCESS__SETRLIMIT);
+		return current_has_perm(current, PROCESS__SETRLIMIT);
 
 	return 0;
 }
@@ -3314,17 +3428,17 @@ static int selinux_task_setscheduler(struct task_struct *p, int policy, struct s
 	if (rc)
 		return rc;
 
-	return task_has_perm(current, p, PROCESS__SETSCHED);
+	return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_getscheduler(struct task_struct *p)
 {
-	return task_has_perm(current, p, PROCESS__GETSCHED);
+	return current_has_perm(p, PROCESS__GETSCHED);
 }
 
 static int selinux_task_movememory(struct task_struct *p)
 {
-	return task_has_perm(current, p, PROCESS__SETSCHED);
+	return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
@@ -3332,7 +3446,6 @@ static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
 {
 	u32 perm;
 	int rc;
-	struct task_security_struct *tsec;
 
 	rc = secondary_ops->task_kill(p, info, sig, secid);
 	if (rc)
@@ -3342,11 +3455,11 @@ static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
 		perm = PROCESS__SIGNULL; /* null signal; existence test */
 	else
 		perm = signal_to_av(sig);
-	tsec = p->security;
 	if (secid)
-		rc = avc_has_perm(secid, tsec->sid, SECCLASS_PROCESS, perm, NULL);
+		rc = avc_has_perm(secid, task_sid(p),
+				  SECCLASS_PROCESS, perm, NULL);
 	else
-		rc = task_has_perm(current, p, perm);
+		rc = current_has_perm(p, perm);
 	return rc;
 }
 
@@ -3354,13 +3467,12 @@ static int selinux_task_prctl(int option,
 			      unsigned long arg2,
 			      unsigned long arg3,
 			      unsigned long arg4,
-			      unsigned long arg5,
-			      long *rc_p)
+			      unsigned long arg5)
 {
 	/* The current prctl operations do not appear to require
 	   any SELinux controls since they merely observe or modify
 	   the state of the current process. */
-	return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
+	return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 }
 
 static int selinux_task_wait(struct task_struct *p)
@@ -3368,27 +3480,14 @@ static int selinux_task_wait(struct task_struct *p)
 	return task_has_perm(p, current, PROCESS__SIGCHLD);
 }
 
-static void selinux_task_reparent_to_init(struct task_struct *p)
-{
-	struct task_security_struct *tsec;
-
-	secondary_ops->task_reparent_to_init(p);
-
-	tsec = p->security;
-	tsec->osid = tsec->sid;
-	tsec->sid = SECINITSID_KERNEL;
-	return;
-}
-
 static void selinux_task_to_inode(struct task_struct *p,
 				  struct inode *inode)
 {
-	struct task_security_struct *tsec = p->security;
 	struct inode_security_struct *isec = inode->i_security;
+	u32 sid = task_sid(p);
 
-	isec->sid = tsec->sid;
+	isec->sid = sid;
 	isec->initialized = 1;
-	return;
 }
 
 /* Returns error only if unable to parse addresses */
@@ -3627,19 +3726,19 @@ static int socket_has_perm(struct task_struct *task, struct socket *sock,
 			   u32 perms)
 {
 	struct inode_security_struct *isec;
-	struct task_security_struct *tsec;
 	struct avc_audit_data ad;
+	u32 sid;
 	int err = 0;
 
-	tsec = task->security;
 	isec = SOCK_INODE(sock)->i_security;
 
 	if (isec->sid == SECINITSID_KERNEL)
 		goto out;
+	sid = task_sid(task);
 
 	AVC_AUDIT_DATA_INIT(&ad, NET);
 	ad.u.net.sk = sock->sk;
-	err = avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
+	err = avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
 
 out:
 	return err;
@@ -3648,18 +3747,20 @@ out:
 static int selinux_socket_create(int family, int type,
 				 int protocol, int kern)
 {
+	const struct cred *cred = current_cred();
+	const struct task_security_struct *tsec = cred->security;
+	u32 sid, newsid;
+	u16 secclass;
 	int err = 0;
-	struct task_security_struct *tsec;
-	u32 newsid;
 
 	if (kern)
 		goto out;
 
-	tsec = current->security;
-	newsid = tsec->sockcreate_sid ? : tsec->sid;
-	err = avc_has_perm(tsec->sid, newsid,
-			   socket_type_to_security_class(family, type,
-			   protocol), SOCKET__CREATE, NULL);
+	sid = tsec->sid;
+	newsid = tsec->sockcreate_sid ?: sid;
+
+	secclass = socket_type_to_security_class(family, type, protocol);
+	err = avc_has_perm(sid, newsid, secclass, SOCKET__CREATE, NULL);
 
 out:
 	return err;
@@ -3668,18 +3769,26 @@ out:
 static int selinux_socket_post_create(struct socket *sock, int family,
 				      int type, int protocol, int kern)
 {
-	int err = 0;
+	const struct cred *cred = current_cred();
+	const struct task_security_struct *tsec = cred->security;
 	struct inode_security_struct *isec;
-	struct task_security_struct *tsec;
 	struct sk_security_struct *sksec;
-	u32 newsid;
+	u32 sid, newsid;
+	int err = 0;
+
+	sid = tsec->sid;
+	newsid = tsec->sockcreate_sid;
 
 	isec = SOCK_INODE(sock)->i_security;
 
-	tsec = current->security;
-	newsid = tsec->sockcreate_sid ? : tsec->sid;
+	if (kern)
+		isec->sid = SECINITSID_KERNEL;
+	else if (newsid)
+		isec->sid = newsid;
+	else
+		isec->sid = sid;
+
 	isec->sclass = socket_type_to_security_class(family, type, protocol);
-	isec->sid = kern ? SECINITSID_KERNEL : newsid;
 	isec->initialized = 1;
 
 	if (sock->sk) {
@@ -3714,7 +3823,6 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
 	if (family == PF_INET || family == PF_INET6) {
 		char *addrp;
 		struct inode_security_struct *isec;
-		struct task_security_struct *tsec;
 		struct avc_audit_data ad;
 		struct sockaddr_in *addr4 = NULL;
 		struct sockaddr_in6 *addr6 = NULL;
@@ -3722,7 +3830,6 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
 		struct sock *sk = sock->sk;
 		u32 sid, node_perm;
 
-		tsec = current->security;
 		isec = SOCK_INODE(sock)->i_security;
 
 		if (family == PF_INET) {
@@ -4387,7 +4494,7 @@ static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
 				  "SELinux:  unrecognized netlink message"
 				  " type=%hu for sclass=%hu\n",
 				  nlh->nlmsg_type, isec->sclass);
-			if (!selinux_enforcing)
+			if (!selinux_enforcing || security_get_allow_unknown())
 				err = 0;
 		}
 
@@ -4628,7 +4735,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
 	 * as fast and as clean as possible. */
 	if (selinux_compat_net || !selinux_policycap_netpeer)
 		return selinux_ip_postroute_compat(skb, ifindex, family);
-
+#ifdef CONFIG_XFRM
 	/* If skb->dst->xfrm is non-NULL then the packet is undergoing an IPsec
 	 * packet transformation so allow the packet to pass without any checks
 	 * since we'll have another chance to perform access control checks
@@ -4637,7 +4744,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
 	 *       is NULL, in this case go ahead and apply access control. */
 	if (skb->dst != NULL && skb->dst->xfrm != NULL)
 		return NF_ACCEPT;
-
+#endif
 	secmark_active = selinux_secmark_enabled();
 	peerlbl_active = netlbl_enabled() || selinux_xfrm_enabled();
 	if (!secmark_active && !peerlbl_active)
@@ -4763,15 +4870,16 @@ static int ipc_alloc_security(struct task_struct *task,
 			      struct kern_ipc_perm *perm,
 			      u16 sclass)
 {
-	struct task_security_struct *tsec = task->security;
 	struct ipc_security_struct *isec;
+	u32 sid;
 
 	isec = kzalloc(sizeof(struct ipc_security_struct), GFP_KERNEL);
 	if (!isec)
 		return -ENOMEM;
 
+	sid = task_sid(task);
 	isec->sclass = sclass;
-	isec->sid = tsec->sid;
+	isec->sid = sid;
 	perm->security = isec;
 
 	return 0;
@@ -4809,17 +4917,16 @@ static void msg_msg_free_security(struct msg_msg *msg)
 static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
 			u32 perms)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 
-	tsec = current->security;
 	isec = ipc_perms->security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = ipc_perms->key;
 
-	return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
+	return avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
 }
 
 static int selinux_msg_msg_alloc_security(struct msg_msg *msg)
@@ -4835,22 +4942,21 @@ static void selinux_msg_msg_free_security(struct msg_msg *msg)
 /* message queue security operations */
 static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	int rc;
 
 	rc = ipc_alloc_security(current, &msq->q_perm, SECCLASS_MSGQ);
 	if (rc)
 		return rc;
 
-	tsec = current->security;
 	isec = msq->q_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = msq->q_perm.key;
 
-	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+	rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
 			  MSGQ__CREATE, &ad);
 	if (rc) {
 		ipc_free_security(&msq->q_perm);
@@ -4866,17 +4972,16 @@ static void selinux_msg_queue_free_security(struct msg_queue *msq)
 
 static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 
-	tsec = current->security;
 	isec = msq->q_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = msq->q_perm.key;
 
-	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+	return avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
 			    MSGQ__ASSOCIATE, &ad);
 }
 
@@ -4910,13 +5015,12 @@ static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
 
 static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct msg_security_struct *msec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	int rc;
 
-	tsec = current->security;
 	isec = msq->q_perm.security;
 	msec = msg->security;
 
@@ -4928,9 +5032,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
 		 * Compute new sid based on current process and
 		 * message queue this message will be stored in
 		 */
-		rc = security_transition_sid(tsec->sid,
-					     isec->sid,
-					     SECCLASS_MSG,
+		rc = security_transition_sid(sid, isec->sid, SECCLASS_MSG,
 					     &msec->sid);
 		if (rc)
 			return rc;
@@ -4940,16 +5042,16 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
 	ad.u.ipc_id = msq->q_perm.key;
 
 	/* Can this process write to the queue? */
-	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+	rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
 			  MSGQ__WRITE, &ad);
 	if (!rc)
 		/* Can this process send the message */
-		rc = avc_has_perm(tsec->sid, msec->sid,
-				  SECCLASS_MSG, MSG__SEND, &ad);
+		rc = avc_has_perm(sid, msec->sid, SECCLASS_MSG,
+				  MSG__SEND, &ad);
 	if (!rc)
 		/* Can the message be put in the queue? */
-		rc = avc_has_perm(msec->sid, isec->sid,
-				  SECCLASS_MSGQ, MSGQ__ENQUEUE, &ad);
+		rc = avc_has_perm(msec->sid, isec->sid, SECCLASS_MSGQ,
+				  MSGQ__ENQUEUE, &ad);
 
 	return rc;
 }
@@ -4958,23 +5060,22 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 				    struct task_struct *target,
 				    long type, int mode)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct msg_security_struct *msec;
 	struct avc_audit_data ad;
+	u32 sid = task_sid(target);
 	int rc;
 
-	tsec = target->security;
 	isec = msq->q_perm.security;
 	msec = msg->security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = msq->q_perm.key;
 
-	rc = avc_has_perm(tsec->sid, isec->sid,
+	rc = avc_has_perm(sid, isec->sid,
 			  SECCLASS_MSGQ, MSGQ__READ, &ad);
 	if (!rc)
-		rc = avc_has_perm(tsec->sid, msec->sid,
+		rc = avc_has_perm(sid, msec->sid,
 				  SECCLASS_MSG, MSG__RECEIVE, &ad);
 	return rc;
 }
@@ -4982,22 +5083,21 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 /* Shared Memory security operations */
 static int selinux_shm_alloc_security(struct shmid_kernel *shp)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	int rc;
 
 	rc = ipc_alloc_security(current, &shp->shm_perm, SECCLASS_SHM);
 	if (rc)
 		return rc;
 
-	tsec = current->security;
 	isec = shp->shm_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = shp->shm_perm.key;
 
-	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+	rc = avc_has_perm(sid, isec->sid, SECCLASS_SHM,
 			  SHM__CREATE, &ad);
 	if (rc) {
 		ipc_free_security(&shp->shm_perm);
@@ -5013,17 +5113,16 @@ static void selinux_shm_free_security(struct shmid_kernel *shp)
 
 static int selinux_shm_associate(struct shmid_kernel *shp, int shmflg)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 
-	tsec = current->security;
 	isec = shp->shm_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = shp->shm_perm.key;
 
-	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+	return avc_has_perm(sid, isec->sid, SECCLASS_SHM,
 			    SHM__ASSOCIATE, &ad);
 }
 
@@ -5081,22 +5180,21 @@ static int selinux_shm_shmat(struct shmid_kernel *shp,
 /* Semaphore security operations */
 static int selinux_sem_alloc_security(struct sem_array *sma)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 	int rc;
 
 	rc = ipc_alloc_security(current, &sma->sem_perm, SECCLASS_SEM);
 	if (rc)
 		return rc;
 
-	tsec = current->security;
 	isec = sma->sem_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = sma->sem_perm.key;
 
-	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+	rc = avc_has_perm(sid, isec->sid, SECCLASS_SEM,
 			  SEM__CREATE, &ad);
 	if (rc) {
 		ipc_free_security(&sma->sem_perm);
@@ -5112,17 +5210,16 @@ static void selinux_sem_free_security(struct sem_array *sma)
 
 static int selinux_sem_associate(struct sem_array *sma, int semflg)
 {
-	struct task_security_struct *tsec;
 	struct ipc_security_struct *isec;
 	struct avc_audit_data ad;
+	u32 sid = current_sid();
 
-	tsec = current->security;
 	isec = sma->sem_perm.security;
 
 	AVC_AUDIT_DATA_INIT(&ad, IPC);
 	ad.u.ipc_id = sma->sem_perm.key;
 
-	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+	return avc_has_perm(sid, isec->sid, SECCLASS_SEM,
 			    SEM__ASSOCIATE, &ad);
 }
 
@@ -5212,33 +5309,35 @@ static void selinux_d_instantiate(struct dentry *dentry, struct inode *inode)
 static int selinux_getprocattr(struct task_struct *p,
 			       char *name, char **value)
 {
-	struct task_security_struct *tsec;
+	const struct task_security_struct *__tsec;
 	u32 sid;
 	int error;
 	unsigned len;
 
 	if (current != p) {
-		error = task_has_perm(current, p, PROCESS__GETATTR);
+		error = current_has_perm(p, PROCESS__GETATTR);
 		if (error)
 			return error;
 	}
 
-	tsec = p->security;
+	rcu_read_lock();
+	__tsec = __task_cred(p)->security;
 
 	if (!strcmp(name, "current"))
-		sid = tsec->sid;
+		sid = __tsec->sid;
 	else if (!strcmp(name, "prev"))
-		sid = tsec->osid;
+		sid = __tsec->osid;
 	else if (!strcmp(name, "exec"))
-		sid = tsec->exec_sid;
+		sid = __tsec->exec_sid;
 	else if (!strcmp(name, "fscreate"))
-		sid = tsec->create_sid;
+		sid = __tsec->create_sid;
 	else if (!strcmp(name, "keycreate"))
-		sid = tsec->keycreate_sid;
+		sid = __tsec->keycreate_sid;
 	else if (!strcmp(name, "sockcreate"))
-		sid = tsec->sockcreate_sid;
+		sid = __tsec->sockcreate_sid;
 	else
-		return -EINVAL;
+		goto invalid;
+	rcu_read_unlock();
 
 	if (!sid)
 		return 0;
@@ -5247,6 +5346,10 @@ static int selinux_getprocattr(struct task_struct *p,
 	if (error)
 		return error;
 	return len;
+
+invalid:
+	rcu_read_unlock();
+	return -EINVAL;
 }
 
 static int selinux_setprocattr(struct task_struct *p,
@@ -5254,7 +5357,8 @@ static int selinux_setprocattr(struct task_struct *p,
 {
 	struct task_security_struct *tsec;
 	struct task_struct *tracer;
-	u32 sid = 0;
+	struct cred *new;
+	u32 sid = 0, ptsid;
 	int error;
 	char *str = value;
 
@@ -5270,15 +5374,15 @@ static int selinux_setprocattr(struct task_struct *p,
 	 * above restriction is ever removed.
 	 */
 	if (!strcmp(name, "exec"))
-		error = task_has_perm(current, p, PROCESS__SETEXEC);
+		error = current_has_perm(p, PROCESS__SETEXEC);
 	else if (!strcmp(name, "fscreate"))
-		error = task_has_perm(current, p, PROCESS__SETFSCREATE);
+		error = current_has_perm(p, PROCESS__SETFSCREATE);
 	else if (!strcmp(name, "keycreate"))
-		error = task_has_perm(current, p, PROCESS__SETKEYCREATE);
+		error = current_has_perm(p, PROCESS__SETKEYCREATE);
 	else if (!strcmp(name, "sockcreate"))
-		error = task_has_perm(current, p, PROCESS__SETSOCKCREATE);
+		error = current_has_perm(p, PROCESS__SETSOCKCREATE);
 	else if (!strcmp(name, "current"))
-		error = task_has_perm(current, p, PROCESS__SETCURRENT);
+		error = current_has_perm(p, PROCESS__SETCURRENT);
 	else
 		error = -EINVAL;
 	if (error)
@@ -5301,87 +5405,75 @@ static int selinux_setprocattr(struct task_struct *p,
 			return error;
 	}
 
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
+
 	/* Permission checking based on the specified context is
 	   performed during the actual operation (execve,
 	   open/mkdir/...), when we know the full context of the
-	   operation.  See selinux_bprm_set_security for the execve
+	   operation.  See selinux_bprm_set_creds for the execve
 	   checks and may_create for the file creation checks. The
 	   operation will then fail if the context is not permitted. */
-	tsec = p->security;
-	if (!strcmp(name, "exec"))
+	tsec = new->security;
+	if (!strcmp(name, "exec")) {
 		tsec->exec_sid = sid;
-	else if (!strcmp(name, "fscreate"))
+	} else if (!strcmp(name, "fscreate")) {
 		tsec->create_sid = sid;
-	else if (!strcmp(name, "keycreate")) {
+	} else if (!strcmp(name, "keycreate")) {
 		error = may_create_key(sid, p);
 		if (error)
-			return error;
+			goto abort_change;
 		tsec->keycreate_sid = sid;
-	} else if (!strcmp(name, "sockcreate"))
+	} else if (!strcmp(name, "sockcreate")) {
 		tsec->sockcreate_sid = sid;
-	else if (!strcmp(name, "current")) {
-		struct av_decision avd;
-
+	} else if (!strcmp(name, "current")) {
+		error = -EINVAL;
 		if (sid == 0)
-			return -EINVAL;
-		/*
-		 * SELinux allows to change context in the following case only.
-		 *  - Single threaded processes.
-		 *  - Multi threaded processes intend to change its context into
-		 *    more restricted domain (defined by TYPEBOUNDS statement).
-		 */
-		if (atomic_read(&p->mm->mm_users) != 1) {
-			struct task_struct *g, *t;
-			struct mm_struct *mm = p->mm;
-			read_lock(&tasklist_lock);
-			do_each_thread(g, t) {
-				if (t->mm == mm && t != p) {
-					read_unlock(&tasklist_lock);
-					error = security_bounded_transition(tsec->sid, sid);
-					if (!error)
-						goto boundary_ok;
-
-					return error;
-				}
-			} while_each_thread(g, t);
-			read_unlock(&tasklist_lock);
+			goto abort_change;
+
+		/* Only allow single threaded processes to change context */
+		error = -EPERM;
+		if (!is_single_threaded(p)) {
+			error = security_bounded_transition(tsec->sid, sid);
+			if (error)
+				goto abort_change;
 		}
-boundary_ok:
 
 		/* Check permissions for the transition. */
 		error = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
 				     PROCESS__DYNTRANSITION, NULL);
 		if (error)
-			return error;
+			goto abort_change;
 
 		/* Check for ptracing, and update the task SID if ok.
 		   Otherwise, leave SID unchanged and fail. */
+		ptsid = 0;
 		task_lock(p);
-		rcu_read_lock();
 		tracer = tracehook_tracer_task(p);
-		if (tracer != NULL) {
-			struct task_security_struct *ptsec = tracer->security;
-			u32 ptsid = ptsec->sid;
-			rcu_read_unlock();
-			error = avc_has_perm_noaudit(ptsid, sid,
-						     SECCLASS_PROCESS,
-						     PROCESS__PTRACE, 0, &avd);
-			if (!error)
-				tsec->sid = sid;
-			task_unlock(p);
-			avc_audit(ptsid, sid, SECCLASS_PROCESS,
-				  PROCESS__PTRACE, &avd, error, NULL);
+		if (tracer)
+			ptsid = task_sid(tracer);
+		task_unlock(p);
+
+		if (tracer) {
+			error = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
+					     PROCESS__PTRACE, NULL);
 			if (error)
-				return error;
-		} else {
-			rcu_read_unlock();
-			tsec->sid = sid;
-			task_unlock(p);
+				goto abort_change;
 		}
-	} else
-		return -EINVAL;
 
+		tsec->sid = sid;
+	} else {
+		error = -EINVAL;
+		goto abort_change;
+	}
+
+	commit_creds(new);
 	return size;
+
+abort_change:
+	abort_creds(new);
+	return error;
 }
 
 static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
@@ -5401,22 +5493,23 @@ static void selinux_release_secctx(char *secdata, u32 seclen)
 
 #ifdef CONFIG_KEYS
 
-static int selinux_key_alloc(struct key *k, struct task_struct *tsk,
+static int selinux_key_alloc(struct key *k, const struct cred *cred,
 			     unsigned long flags)
 {
-	struct task_security_struct *tsec = tsk->security;
+	const struct task_security_struct *tsec;
 	struct key_security_struct *ksec;
 
 	ksec = kzalloc(sizeof(struct key_security_struct), GFP_KERNEL);
 	if (!ksec)
 		return -ENOMEM;
 
+	tsec = cred->security;
 	if (tsec->keycreate_sid)
 		ksec->sid = tsec->keycreate_sid;
 	else
 		ksec->sid = tsec->sid;
-	k->security = ksec;
 
+	k->security = ksec;
 	return 0;
 }
 
@@ -5429,17 +5522,12 @@ static void selinux_key_free(struct key *k)
 }
 
 static int selinux_key_permission(key_ref_t key_ref,
-			    struct task_struct *ctx,
-			    key_perm_t perm)
+				  const struct cred *cred,
+				  key_perm_t perm)
 {
 	struct key *key;
-	struct task_security_struct *tsec;
 	struct key_security_struct *ksec;
-
-	key = key_ref_to_ptr(key_ref);
-
-	tsec = ctx->security;
-	ksec = key->security;
+	u32 sid;
 
 	/* if no specific permissions are requested, we skip the
 	   permission check. No serious, additional covert channels
@@ -5447,8 +5535,12 @@ static int selinux_key_permission(key_ref_t key_ref,
 	if (perm == 0)
 		return 0;
 
-	return avc_has_perm(tsec->sid, ksec->sid,
-			    SECCLASS_KEY, perm, NULL);
+	sid = cred_sid(cred);
+
+	key = key_ref_to_ptr(key_ref);
+	ksec = key->security;
+
+	return avc_has_perm(sid, ksec->sid, SECCLASS_KEY, perm, NULL);
 }
 
 static int selinux_key_getsecurity(struct key *key, char **_buffer)
@@ -5473,8 +5565,7 @@ static struct security_operations selinux_ops = {
 	.ptrace_may_access =		selinux_ptrace_may_access,
 	.ptrace_traceme =		selinux_ptrace_traceme,
 	.capget =			selinux_capget,
-	.capset_check =			selinux_capset_check,
-	.capset_set =			selinux_capset_set,
+	.capset =			selinux_capset,
 	.sysctl =			selinux_sysctl,
 	.capable =			selinux_capable,
 	.quotactl =			selinux_quotactl,
@@ -5485,12 +5576,10 @@ static struct security_operations selinux_ops = {
 	.netlink_send =			selinux_netlink_send,
 	.netlink_recv =			selinux_netlink_recv,
 
-	.bprm_alloc_security =		selinux_bprm_alloc_security,
-	.bprm_free_security =		selinux_bprm_free_security,
-	.bprm_apply_creds =		selinux_bprm_apply_creds,
-	.bprm_post_apply_creds =	selinux_bprm_post_apply_creds,
-	.bprm_set_security =		selinux_bprm_set_security,
+	.bprm_set_creds =		selinux_bprm_set_creds,
 	.bprm_check_security =		selinux_bprm_check_security,
+	.bprm_committing_creds =	selinux_bprm_committing_creds,
+	.bprm_committed_creds =		selinux_bprm_committed_creds,
 	.bprm_secureexec =		selinux_bprm_secureexec,
 
 	.sb_alloc_security =		selinux_sb_alloc_security,
@@ -5549,10 +5638,13 @@ static struct security_operations selinux_ops = {
 	.dentry_open =			selinux_dentry_open,
 
 	.task_create =			selinux_task_create,
-	.task_alloc_security =		selinux_task_alloc_security,
-	.task_free_security =		selinux_task_free_security,
+	.cred_free =			selinux_cred_free,
+	.cred_prepare =			selinux_cred_prepare,
+	.cred_commit =			selinux_cred_commit,
+	.kernel_act_as =		selinux_kernel_act_as,
+	.kernel_create_files_as =	selinux_kernel_create_files_as,
 	.task_setuid =			selinux_task_setuid,
-	.task_post_setuid =		selinux_task_post_setuid,
+	.task_fix_setuid =		selinux_task_fix_setuid,
 	.task_setgid =			selinux_task_setgid,
 	.task_setpgid =			selinux_task_setpgid,
 	.task_getpgid =			selinux_task_getpgid,
@@ -5569,7 +5661,6 @@ static struct security_operations selinux_ops = {
 	.task_kill =			selinux_task_kill,
 	.task_wait =			selinux_task_wait,
 	.task_prctl =			selinux_task_prctl,
-	.task_reparent_to_init =	selinux_task_reparent_to_init,
 	.task_to_inode =		selinux_task_to_inode,
 
 	.ipc_permission =		selinux_ipc_permission,
@@ -5665,8 +5756,6 @@ static struct security_operations selinux_ops = {
 
 static __init int selinux_init(void)
 {
-	struct task_security_struct *tsec;
-
 	if (!security_module_enable(&selinux_ops)) {
 		selinux_enabled = 0;
 		return 0;
@@ -5680,10 +5769,7 @@ static __init int selinux_init(void)
 	printk(KERN_INFO "SELinux:  Initializing.\n");
 
 	/* Set the security state for the initial task. */
-	if (task_alloc_security(current))
-		panic("SELinux:  Failed to initialize initial task.\n");
-	tsec = current->security;
-	tsec->osid = tsec->sid = SECINITSID_KERNEL;
+	cred_init_security();
 
 	sel_inode_cache = kmem_cache_create("selinux_inode_security",
 					    sizeof(struct inode_security_struct),
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index 1223b4ff9be..c0c885427b9 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -176,3 +176,5 @@
    S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NAME_CONNECT, "name_connect")
    S_(SECCLASS_MEMPROTECT, MEMPROTECT__MMAP_ZERO, "mmap_zero")
    S_(SECCLASS_PEER, PEER__RECV, "recv")
+   S_(SECCLASS_KERNEL_SERVICE, KERNEL_SERVICE__USE_AS_OVERRIDE, "use_as_override")
+   S_(SECCLASS_KERNEL_SERVICE, KERNEL_SERVICE__CREATE_FILES_AS, "create_files_as")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index c4c51165c50..0ba79fe00e1 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -841,3 +841,5 @@
 #define DCCP_SOCKET__NAME_CONNECT                 0x00800000UL
 #define MEMPROTECT__MMAP_ZERO                     0x00000001UL
 #define PEER__RECV                                0x00000001UL
+#define KERNEL_SERVICE__USE_AS_OVERRIDE           0x00000001UL
+#define KERNEL_SERVICE__CREATE_FILES_AS           0x00000002UL
diff --git a/security/selinux/include/class_to_string.h b/security/selinux/include/class_to_string.h
index bd813c366e3..21ec786611d 100644
--- a/security/selinux/include/class_to_string.h
+++ b/security/selinux/include/class_to_string.h
@@ -72,3 +72,8 @@
     S_(NULL)
     S_("peer")
     S_("capability2")
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_("kernel_service")
diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h
index febf8868e85..882f27d66fa 100644
--- a/security/selinux/include/flask.h
+++ b/security/selinux/include/flask.h
@@ -52,6 +52,7 @@
 #define SECCLASS_MEMPROTECT                              61
 #define SECCLASS_PEER                                    68
 #define SECCLASS_CAPABILITY2                             69
+#define SECCLASS_KERNEL_SERVICE                          74
 
 /*
  * Security identifier indices for initial entities
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index f8be8d7fa26..3cc45168f67 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -77,17 +77,6 @@ struct ipc_security_struct {
 	u32 sid;	/* SID of IPC resource */
 };
 
-struct bprm_security_struct {
-	u32 sid;		/* SID for transformed process */
-	unsigned char set;
-
-	/*
-	 * unsafe is used to share failure information from bprm_apply_creds()
-	 * to bprm_post_apply_creds().
-	 */
-	char unsafe;
-};
-
 struct netif_security_struct {
 	int ifindex;			/* device index */
 	u32 sid;			/* SID for this interface */
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index ff59c0c4804..4ed7bab89c5 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -63,6 +63,9 @@ static struct nlmsg_perm nlmsg_route_perms[] =
 	{ RTM_GETANYCAST,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_GETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 	{ RTM_SETNEIGHTBL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+	{ RTM_NEWADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+	{ RTM_DELADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+	{ RTM_GETADDRLABEL,	NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 };
 
 static struct nlmsg_perm nlmsg_firewall_perms[] =
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 69c9dccc8cf..c8630363823 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -95,13 +95,18 @@ extern void selnl_notify_setenforce(int val);
 static int task_has_security(struct task_struct *tsk,
 			     u32 perms)
 {
-	struct task_security_struct *tsec;
-
-	tsec = tsk->security;
+	const struct task_security_struct *tsec;
+	u32 sid = 0;
+
+	rcu_read_lock();
+	tsec = __task_cred(tsk)->security;
+	if (tsec)
+		sid = tsec->sid;
+	rcu_read_unlock();
 	if (!tsec)
 		return -EACCES;
 
-	return avc_has_perm(tsec->sid, SECINITSID_SECURITY,
+	return avc_has_perm(sid, SECINITSID_SECURITY,
 			    SECCLASS_SECURITY, perms, NULL);
 }
 
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 8f17f542a11..c0eb72013d6 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -197,7 +197,7 @@ static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
 	struct xfrm_user_sec_ctx *uctx, u32 sid)
 {
 	int rc = 0;
-	struct task_security_struct *tsec = current->security;
+	const struct task_security_struct *tsec = current_security();
 	struct xfrm_sec_ctx *ctx = NULL;
 	char *ctx_str = NULL;
 	u32 str_len;
@@ -333,7 +333,7 @@ void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
  */
 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
 {
-	struct task_security_struct *tsec = current->security;
+	const struct task_security_struct *tsec = current_security();
 	int rc = 0;
 
 	if (ctx) {
@@ -378,7 +378,7 @@ void selinux_xfrm_state_free(struct xfrm_state *x)
   */
 int selinux_xfrm_state_delete(struct xfrm_state *x)
 {
-	struct task_security_struct *tsec = current->security;
+	const struct task_security_struct *tsec = current_security();
 	struct xfrm_sec_ctx *ctx = x->security;
 	int rc = 0;
 
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 79ff21ed4c3..247cec3b5a4 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -164,7 +164,7 @@ int smk_curacc(char *obj_label, u32 mode)
 {
 	int rc;
 
-	rc = smk_access(current->security, obj_label, mode);
+	rc = smk_access(current_security(), obj_label, mode);
 	if (rc == 0)
 		return 0;
 
@@ -173,7 +173,7 @@ int smk_curacc(char *obj_label, u32 mode)
 	 * only one that gets privilege and current does not
 	 * have that label.
 	 */
-	if (smack_onlycap != NULL && smack_onlycap != current->security)
+	if (smack_onlycap != NULL && smack_onlycap != current->cred->security)
 		return rc;
 
 	if (capable(CAP_MAC_OVERRIDE))
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 6e2dc0bab70..1b5551dfc1f 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -30,6 +30,8 @@
 
 #include "smack.h"
 
+#define task_security(task)	(task_cred_xxx((task), security))
+
 /*
  * I hope these are the hokeyist lines of code in the module. Casey.
  */
@@ -102,7 +104,7 @@ static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode)
 	if (rc != 0)
 		return rc;
 
-	rc = smk_access(current->security, ctp->security, MAY_READWRITE);
+	rc = smk_access(current_security(), task_security(ctp), MAY_READWRITE);
 	if (rc != 0 && capable(CAP_MAC_OVERRIDE))
 		return 0;
 	return rc;
@@ -124,7 +126,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
 	if (rc != 0)
 		return rc;
 
-	rc = smk_access(ptp->security, current->security, MAY_READWRITE);
+	rc = smk_access(task_security(ptp), current_security(), MAY_READWRITE);
 	if (rc != 0 && has_capability(ptp, CAP_MAC_OVERRIDE))
 		return 0;
 	return rc;
@@ -141,7 +143,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
 static int smack_syslog(int type)
 {
 	int rc;
-	char *sp = current->security;
+	char *sp = current_security();
 
 	rc = cap_syslog(type);
 	if (rc != 0)
@@ -248,11 +250,12 @@ static int smack_sb_copy_data(char *orig, char *smackopts)
 /**
  * smack_sb_kern_mount - Smack specific mount processing
  * @sb: the file system superblock
+ * @flags: the mount flags
  * @data: the smack mount options
  *
  * Returns 0 on success, an error code on failure
  */
-static int smack_sb_kern_mount(struct super_block *sb, void *data)
+static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
 	struct dentry *root = sb->s_root;
 	struct inode *inode = root->d_inode;
@@ -373,7 +376,7 @@ static int smack_sb_umount(struct vfsmount *mnt, int flags)
  */
 static int smack_inode_alloc_security(struct inode *inode)
 {
-	inode->i_security = new_inode_smack(current->security);
+	inode->i_security = new_inode_smack(current_security());
 	if (inode->i_security == NULL)
 		return -ENOMEM;
 	return 0;
@@ -818,7 +821,7 @@ static int smack_file_permission(struct file *file, int mask)
  */
 static int smack_file_alloc_security(struct file *file)
 {
-	file->f_security = current->security;
+	file->f_security = current_security();
 	return 0;
 }
 
@@ -916,7 +919,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
  */
 static int smack_file_set_fowner(struct file *file)
 {
-	file->f_security = current->security;
+	file->f_security = current_security();
 	return 0;
 }
 
@@ -941,7 +944,7 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
 	 * struct fown_struct is never outside the context of a struct file
 	 */
 	file = container_of(fown, struct file, f_owner);
-	rc = smk_access(file->f_security, tsk->security, MAY_WRITE);
+	rc = smk_access(file->f_security, tsk->cred->security, MAY_WRITE);
 	if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
 		return 0;
 	return rc;
@@ -973,33 +976,75 @@ static int smack_file_receive(struct file *file)
  */
 
 /**
- * smack_task_alloc_security - "allocate" a task blob
- * @tsk: the task in need of a blob
+ * smack_cred_free - "free" task-level security credentials
+ * @cred: the credentials in question
  *
  * Smack isn't using copies of blobs. Everyone
- * points to an immutable list. No alloc required.
- * No data copy required.
+ * points to an immutable list. The blobs never go away.
+ * There is no leak here.
+ */
+static void smack_cred_free(struct cred *cred)
+{
+	cred->security = NULL;
+}
+
+/**
+ * smack_cred_prepare - prepare new set of credentials for modification
+ * @new: the new credentials
+ * @old: the original credentials
+ * @gfp: the atomicity of any memory allocations
+ *
+ * Prepare a new set of credentials for modification.
+ */
+static int smack_cred_prepare(struct cred *new, const struct cred *old,
+			      gfp_t gfp)
+{
+	new->security = old->security;
+	return 0;
+}
+
+/*
+ * commit new credentials
+ * @new: the new credentials
+ * @old: the original credentials
+ */
+static void smack_cred_commit(struct cred *new, const struct cred *old)
+{
+}
+
+/**
+ * smack_kernel_act_as - Set the subjective context in a set of credentials
+ * @new points to the set of credentials to be modified.
+ * @secid specifies the security ID to be set
  *
- * Always returns 0
+ * Set the security data for a kernel service.
  */
-static int smack_task_alloc_security(struct task_struct *tsk)
+static int smack_kernel_act_as(struct cred *new, u32 secid)
 {
-	tsk->security = current->security;
+	char *smack = smack_from_secid(secid);
+
+	if (smack == NULL)
+		return -EINVAL;
 
+	new->security = smack;
 	return 0;
 }
 
 /**
- * smack_task_free_security - "free" a task blob
- * @task: the task with the blob
+ * smack_kernel_create_files_as - Set the file creation label in a set of creds
+ * @new points to the set of credentials to be modified
+ * @inode points to the inode to use as a reference
  *
- * Smack isn't using copies of blobs. Everyone
- * points to an immutable list. The blobs never go away.
- * There is no leak here.
+ * Set the file creation context in a set of credentials to the same
+ * as the objective context of the specified inode
  */
-static void smack_task_free_security(struct task_struct *task)
+static int smack_kernel_create_files_as(struct cred *new,
+					struct inode *inode)
 {
-	task->security = NULL;
+	struct inode_smack *isp = inode->i_security;
+
+	new->security = isp->smk_inode;
+	return 0;
 }
 
 /**
@@ -1011,7 +1056,7 @@ static void smack_task_free_security(struct task_struct *task)
  */
 static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
 {
-	return smk_curacc(p->security, MAY_WRITE);
+	return smk_curacc(task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1022,7 +1067,7 @@ static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
  */
 static int smack_task_getpgid(struct task_struct *p)
 {
-	return smk_curacc(p->security, MAY_READ);
+	return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1033,7 +1078,7 @@ static int smack_task_getpgid(struct task_struct *p)
  */
 static int smack_task_getsid(struct task_struct *p)
 {
-	return smk_curacc(p->security, MAY_READ);
+	return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1045,7 +1090,7 @@ static int smack_task_getsid(struct task_struct *p)
  */
 static void smack_task_getsecid(struct task_struct *p, u32 *secid)
 {
-	*secid = smack_to_secid(p->security);
+	*secid = smack_to_secid(task_security(p));
 }
 
 /**
@@ -1061,7 +1106,7 @@ static int smack_task_setnice(struct task_struct *p, int nice)
 
 	rc = cap_task_setnice(p, nice);
 	if (rc == 0)
-		rc = smk_curacc(p->security, MAY_WRITE);
+		rc = smk_curacc(task_security(p), MAY_WRITE);
 	return rc;
 }
 
@@ -1078,7 +1123,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
 
 	rc = cap_task_setioprio(p, ioprio);
 	if (rc == 0)
-		rc = smk_curacc(p->security, MAY_WRITE);
+		rc = smk_curacc(task_security(p), MAY_WRITE);
 	return rc;
 }
 
@@ -1090,7 +1135,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
  */
 static int smack_task_getioprio(struct task_struct *p)
 {
-	return smk_curacc(p->security, MAY_READ);
+	return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1108,7 +1153,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
 
 	rc = cap_task_setscheduler(p, policy, lp);
 	if (rc == 0)
-		rc = smk_curacc(p->security, MAY_WRITE);
+		rc = smk_curacc(task_security(p), MAY_WRITE);
 	return rc;
 }
 
@@ -1120,7 +1165,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
  */
 static int smack_task_getscheduler(struct task_struct *p)
 {
-	return smk_curacc(p->security, MAY_READ);
+	return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1131,7 +1176,7 @@ static int smack_task_getscheduler(struct task_struct *p)
  */
 static int smack_task_movememory(struct task_struct *p)
 {
-	return smk_curacc(p->security, MAY_WRITE);
+	return smk_curacc(task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1154,13 +1199,13 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
 	 * can write the receiver.
 	 */
 	if (secid == 0)
-		return smk_curacc(p->security, MAY_WRITE);
+		return smk_curacc(task_security(p), MAY_WRITE);
 	/*
 	 * If the secid isn't 0 we're dealing with some USB IO
 	 * specific behavior. This is not clean. For one thing
 	 * we can't take privilege into account.
 	 */
-	return smk_access(smack_from_secid(secid), p->security, MAY_WRITE);
+	return smk_access(smack_from_secid(secid), task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1173,7 +1218,7 @@ static int smack_task_wait(struct task_struct *p)
 {
 	int rc;
 
-	rc = smk_access(current->security, p->security, MAY_WRITE);
+	rc = smk_access(current_security(), task_security(p), MAY_WRITE);
 	if (rc == 0)
 		return 0;
 
@@ -1204,7 +1249,7 @@ static int smack_task_wait(struct task_struct *p)
 static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
 {
 	struct inode_smack *isp = inode->i_security;
-	isp->smk_inode = p->security;
+	isp->smk_inode = task_security(p);
 }
 
 /*
@@ -1223,7 +1268,7 @@ static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
  */
 static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
 {
-	char *csp = current->security;
+	char *csp = current_security();
 	struct socket_smack *ssp;
 
 	ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
@@ -1448,7 +1493,7 @@ static int smack_flags_to_may(int flags)
  */
 static int smack_msg_msg_alloc_security(struct msg_msg *msg)
 {
-	msg->security = current->security;
+	msg->security = current_security();
 	return 0;
 }
 
@@ -1484,7 +1529,7 @@ static int smack_shm_alloc_security(struct shmid_kernel *shp)
 {
 	struct kern_ipc_perm *isp = &shp->shm_perm;
 
-	isp->security = current->security;
+	isp->security = current_security();
 	return 0;
 }
 
@@ -1593,7 +1638,7 @@ static int smack_sem_alloc_security(struct sem_array *sma)
 {
 	struct kern_ipc_perm *isp = &sma->sem_perm;
 
-	isp->security = current->security;
+	isp->security = current_security();
 	return 0;
 }
 
@@ -1697,7 +1742,7 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
 {
 	struct kern_ipc_perm *kisp = &msq->q_perm;
 
-	kisp->security = current->security;
+	kisp->security = current_security();
 	return 0;
 }
 
@@ -1852,7 +1897,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
 	struct super_block *sbp;
 	struct superblock_smack *sbsp;
 	struct inode_smack *isp;
-	char *csp = current->security;
+	char *csp = current_security();
 	char *fetched;
 	char *final;
 	struct dentry *dp;
@@ -2009,7 +2054,7 @@ static int smack_getprocattr(struct task_struct *p, char *name, char **value)
 	if (strcmp(name, "current") != 0)
 		return -EINVAL;
 
-	cp = kstrdup(p->security, GFP_KERNEL);
+	cp = kstrdup(task_security(p), GFP_KERNEL);
 	if (cp == NULL)
 		return -ENOMEM;
 
@@ -2033,6 +2078,7 @@ static int smack_getprocattr(struct task_struct *p, char *name, char **value)
 static int smack_setprocattr(struct task_struct *p, char *name,
 			     void *value, size_t size)
 {
+	struct cred *new;
 	char *newsmack;
 
 	/*
@@ -2055,7 +2101,11 @@ static int smack_setprocattr(struct task_struct *p, char *name,
 	if (newsmack == NULL)
 		return -EINVAL;
 
-	p->security = newsmack;
+	new = prepare_creds();
+	if (!new)
+		return -ENOMEM;
+	new->security = newsmack;
+	commit_creds(new);
 	return size;
 }
 
@@ -2288,8 +2338,7 @@ static void smack_sock_graft(struct sock *sk, struct socket *parent)
 		return;
 
 	ssp = sk->sk_security;
-	ssp->smk_in = current->security;
-	ssp->smk_out = current->security;
+	ssp->smk_in = ssp->smk_out = current_security();
 	ssp->smk_packet[0] = '\0';
 
 	rc = smack_netlabel(sk);
@@ -2352,17 +2401,17 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
 /**
  * smack_key_alloc - Set the key security blob
  * @key: object
- * @tsk: the task associated with the key
+ * @cred: the credentials to use
  * @flags: unused
  *
  * No allocation required
  *
  * Returns 0
  */
-static int smack_key_alloc(struct key *key, struct task_struct *tsk,
+static int smack_key_alloc(struct key *key, const struct cred *cred,
 			   unsigned long flags)
 {
-	key->security = tsk->security;
+	key->security = cred->security;
 	return 0;
 }
 
@@ -2380,14 +2429,14 @@ static void smack_key_free(struct key *key)
 /*
  * smack_key_permission - Smack access on a key
  * @key_ref: gets to the object
- * @context: task involved
+ * @cred: the credentials to use
  * @perm: unused
  *
  * Return 0 if the task has read and write to the object,
  * an error code otherwise
  */
 static int smack_key_permission(key_ref_t key_ref,
-				struct task_struct *context, key_perm_t perm)
+				const struct cred *cred, key_perm_t perm)
 {
 	struct key *keyp;
 
@@ -2403,10 +2452,10 @@ static int smack_key_permission(key_ref_t key_ref,
 	/*
 	 * This should not occur
 	 */
-	if (context->security == NULL)
+	if (cred->security == NULL)
 		return -EACCES;
 
-	return smk_access(context->security, keyp->security, MAY_READWRITE);
+	return smk_access(cred->security, keyp->security, MAY_READWRITE);
 }
 #endif /* CONFIG_KEYS */
 
@@ -2577,15 +2626,13 @@ struct security_operations smack_ops = {
 	.ptrace_may_access =		smack_ptrace_may_access,
 	.ptrace_traceme =		smack_ptrace_traceme,
 	.capget = 			cap_capget,
-	.capset_check = 		cap_capset_check,
-	.capset_set = 			cap_capset_set,
+	.capset = 			cap_capset,
 	.capable = 			cap_capable,
 	.syslog = 			smack_syslog,
 	.settime = 			cap_settime,
 	.vm_enough_memory = 		cap_vm_enough_memory,
 
-	.bprm_apply_creds = 		cap_bprm_apply_creds,
-	.bprm_set_security = 		cap_bprm_set_security,
+	.bprm_set_creds = 		cap_bprm_set_creds,
 	.bprm_secureexec = 		cap_bprm_secureexec,
 
 	.sb_alloc_security = 		smack_sb_alloc_security,
@@ -2627,9 +2674,12 @@ struct security_operations smack_ops = {
 	.file_send_sigiotask = 		smack_file_send_sigiotask,
 	.file_receive = 		smack_file_receive,
 
-	.task_alloc_security = 		smack_task_alloc_security,
-	.task_free_security = 		smack_task_free_security,
-	.task_post_setuid =		cap_task_post_setuid,
+	.cred_free =			smack_cred_free,
+	.cred_prepare =			smack_cred_prepare,
+	.cred_commit =			smack_cred_commit,
+	.kernel_act_as =		smack_kernel_act_as,
+	.kernel_create_files_as =	smack_kernel_create_files_as,
+	.task_fix_setuid =		cap_task_fix_setuid,
 	.task_setpgid = 		smack_task_setpgid,
 	.task_getpgid = 		smack_task_getpgid,
 	.task_getsid = 			smack_task_getsid,
@@ -2642,7 +2692,6 @@ struct security_operations smack_ops = {
 	.task_movememory = 		smack_task_movememory,
 	.task_kill = 			smack_task_kill,
 	.task_wait = 			smack_task_wait,
-	.task_reparent_to_init =	cap_task_reparent_to_init,
 	.task_to_inode = 		smack_task_to_inode,
 	.task_prctl =			cap_task_prctl,
 
@@ -2718,6 +2767,8 @@ struct security_operations smack_ops = {
  */
 static __init int smack_init(void)
 {
+	struct cred *cred;
+
 	if (!security_module_enable(&smack_ops))
 		return 0;
 
@@ -2726,7 +2777,8 @@ static __init int smack_init(void)
 	/*
 	 * Set the security state for the initial task.
 	 */
-	current->security = &smack_known_floor.smk_known;
+	cred = (struct cred *) current->cred;
+	cred->security = &smack_known_floor.smk_known;
 
 	/*
 	 * Initialize locks
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index c21d8c8bf0c..247dc9ebbc7 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -185,11 +185,15 @@ static int smk_open_load(struct inode *inode, struct file *file)
  * the subject/object pair and replaces the access that was
  * there. If the pair isn't found add it with the specified
  * access.
+ *
+ * Returns 0 if nothing goes wrong or -ENOMEM if it fails
+ * during the allocation of the new pair to add.
  */
-static void smk_set_access(struct smack_rule *srp)
+static int smk_set_access(struct smack_rule *srp)
 {
 	struct smk_list_entry *sp;
 	struct smk_list_entry *newp;
+	int ret = 0;
 
 	mutex_lock(&smack_list_lock);
 
@@ -202,14 +206,20 @@ static void smk_set_access(struct smack_rule *srp)
 
 	if (sp == NULL) {
 		newp = kzalloc(sizeof(struct smk_list_entry), GFP_KERNEL);
+		if (newp == NULL) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
 		newp->smk_rule = *srp;
 		newp->smk_next = smack_list;
 		smack_list = newp;
 	}
 
+out:
 	mutex_unlock(&smack_list_lock);
 
-	return;
+	return ret;
 }
 
 /**
@@ -309,8 +319,10 @@ static ssize_t smk_write_load(struct file *file, const char __user *buf,
 		goto out;
 	}
 
-	smk_set_access(&rule);
-	rc = count;
+	rc = smk_set_access(&rule);
+
+	if (!rc)
+		rc = count;
 
 out:
 	kfree(data);
@@ -336,7 +348,7 @@ static void smk_cipso_doi(void)
 
 	audit_info.loginuid = audit_get_loginuid(current);
 	audit_info.sessionid = audit_get_sessionid(current);
-	audit_info.secid = smack_to_secid(current->security);
+	audit_info.secid = smack_to_secid(current_security());
 
 	rc = netlbl_cfg_map_del(NULL, &audit_info);
 	if (rc != 0)
@@ -371,7 +383,7 @@ static void smk_unlbl_ambient(char *oldambient)
 
 	audit_info.loginuid = audit_get_loginuid(current);
 	audit_info.sessionid = audit_get_sessionid(current);
-	audit_info.secid = smack_to_secid(current->security);
+	audit_info.secid = smack_to_secid(current_security());
 
 	if (oldambient != NULL) {
 		rc = netlbl_cfg_map_del(oldambient, &audit_info);
@@ -843,7 +855,7 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
 				 size_t count, loff_t *ppos)
 {
 	char in[SMK_LABELLEN];
-	char *sp = current->security;
+	char *sp = current->cred->security;
 
 	if (!capable(CAP_MAC_ADMIN))
 		return -EPERM;