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-rw-r--r--security/Kconfig20
-rw-r--r--security/capability.c1
-rw-r--r--security/commoncap.c5
-rw-r--r--security/dummy.c34
-rw-r--r--security/inode.c11
-rw-r--r--security/keys/internal.h4
-rw-r--r--security/keys/key.c71
-rw-r--r--security/keys/keyctl.c63
-rw-r--r--security/keys/keyring.c28
-rw-r--r--security/keys/proc.c7
-rw-r--r--security/keys/process_keys.c69
-rw-r--r--security/keys/request_key.c64
-rw-r--r--security/keys/request_key_auth.c49
-rw-r--r--security/keys/user_defined.c25
-rw-r--r--security/root_plug.c1
-rw-r--r--security/seclvl.c1
-rw-r--r--security/security.c1
-rw-r--r--security/selinux/hooks.c194
-rw-r--r--security/selinux/include/av_perm_to_string.h9
-rw-r--r--security/selinux/include/av_permissions.h10
-rw-r--r--security/selinux/include/class_to_string.h1
-rw-r--r--security/selinux/include/flask.h1
-rw-r--r--security/selinux/include/objsec.h7
-rw-r--r--security/selinux/selinuxfs.c8
-rw-r--r--security/selinux/ss/services.c48
-rw-r--r--security/selinux/xfrm.c1
26 files changed, 567 insertions, 166 deletions
diff --git a/security/Kconfig b/security/Kconfig
index 34f593410d5..67785df264e 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -22,16 +22,22 @@ config KEYS
If you are unsure as to whether this is required, answer N.
config KEYS_DEBUG_PROC_KEYS
- bool "Enable the /proc/keys file by which all keys may be viewed"
+ bool "Enable the /proc/keys file by which keys may be viewed"
depends on KEYS
help
- This option turns on support for the /proc/keys file through which
- all the keys on the system can be listed.
+ This option turns on support for the /proc/keys file - through which
+ can be listed all the keys on the system that are viewable by the
+ reading process.
- This option is a slight security risk in that it makes it possible
- for anyone to see all the keys on the system. Normally the manager
- pretends keys that are inaccessible to a process don't exist as far
- as that process is concerned.
+ The only keys included in the list are those that grant View
+ permission to the reading process whether or not it possesses them.
+ Note that LSM security checks are still performed, and may further
+ filter out keys that the current process is not authorised to view.
+
+ Only key attributes are listed here; key payloads are not included in
+ the resulting table.
+
+ If you are unsure as to whether this is required, answer N.
config SECURITY
bool "Enable different security models"
diff --git a/security/capability.c b/security/capability.c
index f9b35cc0b24..b868e7eda5f 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -8,7 +8,6 @@
*
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
diff --git a/security/commoncap.c b/security/commoncap.c
index 841eb4e5c62..f50fc298cf8 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -8,7 +8,6 @@
*/
#include <linux/capability.h>
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -33,9 +32,9 @@ int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
EXPORT_SYMBOL(cap_netlink_send);
-int cap_netlink_recv(struct sk_buff *skb)
+int cap_netlink_recv(struct sk_buff *skb, int cap)
{
- if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
+ if (!cap_raised(NETLINK_CB(skb).eff_cap, cap))
return -EPERM;
return 0;
}
diff --git a/security/dummy.c b/security/dummy.c
index 64f6da0f422..bbbfda70e13 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -15,7 +15,6 @@
#undef DEBUG
#include <linux/capability.h>
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mman.h>
@@ -191,7 +190,7 @@ static int dummy_sb_kern_mount (struct super_block *sb, void *data)
return 0;
}
-static int dummy_sb_statfs (struct super_block *sb)
+static int dummy_sb_statfs (struct dentry *dentry)
{
return 0;
}
@@ -506,6 +505,9 @@ static int dummy_task_getsid (struct task_struct *p)
return 0;
}
+static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
+{ }
+
static int dummy_task_setgroups (struct group_info *group_info)
{
return 0;
@@ -516,6 +518,16 @@ static int dummy_task_setnice (struct task_struct *p, int nice)
return 0;
}
+static int dummy_task_setioprio (struct task_struct *p, int ioprio)
+{
+ return 0;
+}
+
+static int dummy_task_getioprio (struct task_struct *p)
+{
+ return 0;
+}
+
static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
{
return 0;
@@ -532,13 +544,18 @@ static int dummy_task_getscheduler (struct task_struct *p)
return 0;
}
+static int dummy_task_movememory (struct task_struct *p)
+{
+ return 0;
+}
+
static int dummy_task_wait (struct task_struct *p)
{
return 0;
}
static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
- int sig)
+ int sig, u32 secid)
{
return 0;
}
@@ -665,9 +682,9 @@ static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
return 0;
}
-static int dummy_netlink_recv (struct sk_buff *skb)
+static int dummy_netlink_recv (struct sk_buff *skb, int cap)
{
- if (!cap_raised (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN))
+ if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
return -EPERM;
return 0;
}
@@ -860,7 +877,8 @@ static int dummy_setprocattr(struct task_struct *p, char *name, void *value, siz
}
#ifdef CONFIG_KEYS
-static inline int dummy_key_alloc(struct key *key)
+static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
+ unsigned long flags)
{
return 0;
}
@@ -970,11 +988,15 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, task_setpgid);
set_to_dummy_if_null(ops, task_getpgid);
set_to_dummy_if_null(ops, task_getsid);
+ set_to_dummy_if_null(ops, task_getsecid);
set_to_dummy_if_null(ops, task_setgroups);
set_to_dummy_if_null(ops, task_setnice);
+ set_to_dummy_if_null(ops, task_setioprio);
+ set_to_dummy_if_null(ops, task_getioprio);
set_to_dummy_if_null(ops, task_setrlimit);
set_to_dummy_if_null(ops, task_setscheduler);
set_to_dummy_if_null(ops, task_getscheduler);
+ set_to_dummy_if_null(ops, task_movememory);
set_to_dummy_if_null(ops, task_wait);
set_to_dummy_if_null(ops, task_kill);
set_to_dummy_if_null(ops, task_prctl);
diff --git a/security/inode.c b/security/inode.c
index 0f77b022366..47eb63480da 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -13,7 +13,6 @@
*/
/* #define DEBUG */
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/mount.h>
@@ -135,11 +134,11 @@ static int fill_super(struct super_block *sb, void *data, int silent)
return simple_fill_super(sb, SECURITYFS_MAGIC, files);
}
-static struct super_block *get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, fill_super);
+ return get_sb_single(fs_type, flags, data, fill_super, mnt);
}
static struct file_system_type fs_type = {
@@ -224,7 +223,7 @@ struct dentry *securityfs_create_file(const char *name, mode_t mode,
pr_debug("securityfs: creating file '%s'\n",name);
- error = simple_pin_fs("securityfs", &mount, &mount_count);
+ error = simple_pin_fs(&fs_type, &mount, &mount_count);
if (error) {
dentry = ERR_PTR(error);
goto exit;
diff --git a/security/keys/internal.h b/security/keys/internal.h
index e066e605795..1bb416f4bbc 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -99,7 +99,9 @@ extern int install_process_keyring(struct task_struct *tsk);
extern struct key *request_key_and_link(struct key_type *type,
const char *description,
const char *callout_info,
- struct key *dest_keyring);
+ void *aux,
+ struct key *dest_keyring,
+ unsigned long flags);
/*
* request_key authorisation
diff --git a/security/keys/key.c b/security/keys/key.c
index b6061fa29da..80de8c3e9cc 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -11,15 +11,16 @@
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/poison.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/security.h>
#include <linux/workqueue.h>
+#include <linux/random.h>
#include <linux/err.h>
#include "internal.h"
static kmem_cache_t *key_jar;
-static key_serial_t key_serial_next = 3;
struct rb_root key_serial_tree; /* tree of keys indexed by serial */
DEFINE_SPINLOCK(key_serial_lock);
@@ -169,22 +170,23 @@ static void __init __key_insert_serial(struct key *key)
/*****************************************************************************/
/*
* assign a key the next unique serial number
- * - we work through all the serial numbers between 2 and 2^31-1 in turn and
- * then wrap
+ * - these are assigned randomly to avoid security issues through covert
+ * channel problems
*/
static inline void key_alloc_serial(struct key *key)
{
struct rb_node *parent, **p;
struct key *xkey;
- spin_lock(&key_serial_lock);
-
- /* propose a likely serial number and look for a hole for it in the
+ /* propose a random serial number and look for a hole for it in the
* serial number tree */
- key->serial = key_serial_next;
- if (key->serial < 3)
- key->serial = 3;
- key_serial_next = key->serial + 1;
+ do {
+ get_random_bytes(&key->serial, sizeof(key->serial));
+
+ key->serial >>= 1; /* negative numbers are not permitted */
+ } while (key->serial < 3);
+
+ spin_lock(&key_serial_lock);
parent = NULL;
p = &key_serial_tree.rb_node;
@@ -204,19 +206,18 @@ static inline void key_alloc_serial(struct key *key)
/* we found a key with the proposed serial number - walk the tree from
* that point looking for the next unused serial number */
- serial_exists:
+serial_exists:
for (;;) {
- key->serial = key_serial_next;
+ key->serial++;
if (key->serial < 2)
key->serial = 2;
- key_serial_next = key->serial + 1;
- if (!parent->rb_parent)
+ if (!rb_parent(parent))
p = &key_serial_tree.rb_node;
- else if (parent->rb_parent->rb_left == parent)
- p = &parent->rb_parent->rb_left;
+ else if (rb_parent(parent)->rb_left == parent)
+ p = &(rb_parent(parent)->rb_left);
else
- p = &parent->rb_parent->rb_right;
+ p = &(rb_parent(parent)->rb_right);
parent = rb_next(parent);
if (!parent)
@@ -228,7 +229,7 @@ static inline void key_alloc_serial(struct key *key)
}
/* we've found a suitable hole - arrange for this key to occupy it */
- insert_here:
+insert_here:
rb_link_node(&key->serial_node, parent, p);
rb_insert_color(&key->serial_node, &key_serial_tree);
@@ -247,8 +248,8 @@ static inline void key_alloc_serial(struct key *key)
* 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, key_perm_t perm,
- int not_in_quota)
+ uid_t uid, gid_t gid, struct task_struct *ctx,
+ key_perm_t perm, unsigned long flags)
{
struct key_user *user = NULL;
struct key *key;
@@ -269,12 +270,14 @@ struct key *key_alloc(struct key_type *type, const char *desc,
/* check that the user's quota permits allocation of another key and
* its description */
- if (!not_in_quota) {
+ if (!(flags & KEY_ALLOC_NOT_IN_QUOTA)) {
spin_lock(&user->lock);
- if (user->qnkeys + 1 >= KEYQUOTA_MAX_KEYS ||
- user->qnbytes + quotalen >= KEYQUOTA_MAX_BYTES
- )
- goto no_quota;
+ if (!(flags & KEY_ALLOC_QUOTA_OVERRUN)) {
+ if (user->qnkeys + 1 >= KEYQUOTA_MAX_KEYS ||
+ user->qnbytes + quotalen >= KEYQUOTA_MAX_BYTES
+ )
+ goto no_quota;
+ }
user->qnkeys++;
user->qnbytes += quotalen;
@@ -308,7 +311,7 @@ struct key *key_alloc(struct key_type *type, const char *desc,
key->payload.data = NULL;
key->security = NULL;
- if (!not_in_quota)
+ if (!(flags & KEY_ALLOC_NOT_IN_QUOTA))
key->flags |= 1 << KEY_FLAG_IN_QUOTA;
memset(&key->type_data, 0, sizeof(key->type_data));
@@ -318,7 +321,7 @@ 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);
+ ret = security_key_alloc(key, ctx, flags);
if (ret < 0)
goto security_error;
@@ -332,7 +335,7 @@ error:
security_error:
kfree(key->description);
kmem_cache_free(key_jar, key);
- if (!not_in_quota) {
+ if (!(flags & KEY_ALLOC_NOT_IN_QUOTA)) {
spin_lock(&user->lock);
user->qnkeys--;
user->qnbytes -= quotalen;
@@ -345,7 +348,7 @@ security_error:
no_memory_3:
kmem_cache_free(key_jar, key);
no_memory_2:
- if (!not_in_quota) {
+ if (!(flags & KEY_ALLOC_NOT_IN_QUOTA)) {
spin_lock(&user->lock);
user->qnkeys--;
user->qnbytes -= quotalen;
@@ -761,7 +764,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
const char *description,
const void *payload,
size_t plen,
- int not_in_quota)
+ unsigned long flags)
{
struct key_type *ktype;
struct key *keyring, *key = NULL;
@@ -822,7 +825,7 @@ 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,
- perm, not_in_quota);
+ current, perm, flags);
if (IS_ERR(key)) {
key_ref = ERR_PTR(PTR_ERR(key));
goto error_3;
@@ -907,6 +910,10 @@ void key_revoke(struct key *key)
* it */
down_write(&key->sem);
set_bit(KEY_FLAG_REVOKED, &key->flags);
+
+ if (key->type->revoke)
+ key->type->revoke(key);
+
up_write(&key->sem);
} /* end key_revoke() */
@@ -982,7 +989,7 @@ void unregister_key_type(struct key_type *ktype)
if (key->type == ktype) {
if (ktype->destroy)
ktype->destroy(key);
- memset(&key->payload, 0xbd, sizeof(key->payload));
+ memset(&key->payload, KEY_DESTROY, sizeof(key->payload));
}
}
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index ed71d86d2ce..d9ca15c109c 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -102,7 +102,7 @@ asmlinkage long sys_add_key(const char __user *_type,
/* create or update the requested key and add it to the target
* keyring */
key_ref = key_create_or_update(keyring_ref, type, description,
- payload, plen, 0);
+ payload, plen, KEY_ALLOC_IN_QUOTA);
if (!IS_ERR(key_ref)) {
ret = key_ref_to_ptr(key_ref)->serial;
key_ref_put(key_ref);
@@ -183,8 +183,9 @@ asmlinkage long sys_request_key(const char __user *_type,
}
/* do the search */
- key = request_key_and_link(ktype, description, callout_info,
- key_ref_to_ptr(dest_ref));
+ key = request_key_and_link(ktype, description, callout_info, NULL,
+ key_ref_to_ptr(dest_ref),
+ KEY_ALLOC_IN_QUOTA);
if (IS_ERR(key)) {
ret = PTR_ERR(key);
goto error5;
@@ -672,6 +673,7 @@ long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
*/
long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
{
+ struct key_user *newowner, *zapowner = NULL;
struct key *key;
key_ref_t key_ref;
long ret;
@@ -695,19 +697,50 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
if (!capable(CAP_SYS_ADMIN)) {
/* only the sysadmin can chown a key to some other UID */
if (uid != (uid_t) -1 && key->uid != uid)
- goto no_access;
+ goto error_put;
/* only the sysadmin can set the key's GID to a group other
* than one of those that the current process subscribes to */
if (gid != (gid_t) -1 && gid != key->gid && !in_group_p(gid))
- goto no_access;
+ goto error_put;
}
- /* change the UID (have to update the quotas) */
+ /* change the UID */
if (uid != (uid_t) -1 && uid != key->uid) {
- /* don't support UID changing yet */
- ret = -EOPNOTSUPP;
- goto no_access;
+ ret = -ENOMEM;
+ newowner = key_user_lookup(uid);
+ if (!newowner)
+ goto error_put;
+
+ /* transfer the quota burden to the new user */
+ if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) {
+ spin_lock(&newowner->lock);
+ if (newowner->qnkeys + 1 >= KEYQUOTA_MAX_KEYS ||
+ newowner->qnbytes + key->quotalen >=
+ KEYQUOTA_MAX_BYTES)
+ goto quota_overrun;
+
+ newowner->qnkeys++;
+ newowner->qnbytes += key->quotalen;
+ spin_unlock(&newowner->lock);
+
+ spin_lock(&key->user->lock);
+ key->user->qnkeys--;
+ key->user->qnbytes -= key->quotalen;
+ spin_unlock(&key->user->lock);
+ }
+
+ atomic_dec(&key->user->nkeys);
+ atomic_inc(&newowner->nkeys);
+
+ if (test_bit(KEY_FLAG_INSTANTIATED, &key->flags)) {
+ atomic_dec(&key->user->nikeys);
+ atomic_inc(&newowner->nikeys);
+ }
+
+ zapowner = key->user;
+ key->user = newowner;
+ key->uid = uid;
}
/* change the GID */
@@ -716,12 +749,20 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
ret = 0;
- no_access:
+error_put:
up_write(&key->sem);
key_put(key);
- error:
+ if (zapowner)
+ key_user_put(zapowner);
+error:
return ret;
+quota_overrun:
+ spin_unlock(&newowner->lock);
+ zapowner = newowner;
+ ret = -EDQUOT;
+ goto error_put;
+
} /* end keyctl_chown_key() */
/*****************************************************************************/
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index bffa924c1f8..e8d02acc51e 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -49,6 +49,7 @@ static inline unsigned keyring_hash(const char *desc)
static int keyring_instantiate(struct key *keyring,
const void *data, size_t datalen);
static int keyring_match(const struct key *keyring, const void *criterion);
+static void keyring_revoke(struct key *keyring);
static void keyring_destroy(struct key *keyring);
static void keyring_describe(const struct key *keyring, struct seq_file *m);
static long keyring_read(const struct key *keyring,
@@ -59,6 +60,7 @@ struct key_type key_type_keyring = {
.def_datalen = sizeof(struct keyring_list),
.instantiate = keyring_instantiate,
.match = keyring_match,
+ .revoke = keyring_revoke,
.destroy = keyring_destroy,
.describe = keyring_describe,
.read = keyring_read,
@@ -240,15 +242,16 @@ 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,
- int not_in_quota, struct key *dest)
+ struct task_struct *ctx, unsigned long flags,
+ struct key *dest)
{
struct key *keyring;
int ret;
keyring = key_alloc(&key_type_keyring, description,
- uid, gid,
+ uid, gid, ctx,
(KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_ALL,
- not_in_quota);
+ flags);
if (!IS_ERR(keyring)) {
ret = key_instantiate_and_link(keyring, NULL, 0, dest, NULL);
@@ -952,3 +955,22 @@ int keyring_clear(struct key *keyring)
} /* end keyring_clear() */
EXPORT_SYMBOL(keyring_clear);
+
+/*****************************************************************************/
+/*
+ * dispose of the links from a revoked keyring
+ * - called with the key sem write-locked
+ */
+static void keyring_revoke(struct key *keyring)
+{
+ struct keyring_list *klist = keyring->payload.subscriptions;
+
+ /* adjust the quota */
+ key_payload_reserve(keyring, 0);
+
+ if (klist) {
+ rcu_assign_pointer(keyring->payload.subscriptions, NULL);
+ call_rcu(&klist->rcu, keyring_clear_rcu_disposal);
+ }
+
+} /* end keyring_revoke() */
diff --git a/security/keys/proc.c b/security/keys/proc.c
index 12b750e51fb..686a9ee0c5d 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -137,6 +137,13 @@ static int proc_keys_show(struct seq_file *m, void *v)
struct timespec now;
unsigned long timo;
char xbuf[12];
+ 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);
+ if (rc < 0)
+ return 0;
now = current_kernel_time();
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 217a0bef3c8..32150cf7c37 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -67,7 +67,8 @@ struct key root_session_keyring = {
/*
* allocate the keyrings to be associated with a UID
*/
-int alloc_uid_keyring(struct user_struct *user)
+int alloc_uid_keyring(struct user_struct *user,
+ struct task_struct *ctx)
{
struct key *uid_keyring, *session_keyring;
char buf[20];
@@ -76,7 +77,8 @@ int alloc_uid_keyring(struct user_struct *user)
/* concoct a default session keyring */
sprintf(buf, "_uid_ses.%u", user->uid);
- session_keyring = keyring_alloc(buf, user->uid, (gid_t) -1, 0, NULL);
+ session_keyring = keyring_alloc(buf, user->uid, (gid_t) -1, ctx,
+ KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(session_keyring)) {
ret = PTR_ERR(session_keyring);
goto error;
@@ -86,8 +88,8 @@ int alloc_uid_keyring(struct user_struct *user)
* keyring */
sprintf(buf, "_uid.%u", user->uid);
- uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1, 0,
- session_keyring);
+ uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1, ctx,
+ KEY_ALLOC_IN_QUOTA, session_keyring);
if (IS_ERR(uid_keyring)) {
key_put(session_keyring);
ret = PTR_ERR(uid_keyring);
@@ -143,7 +145,8 @@ int install_thread_keyring(struct task_struct *tsk)
sprintf(buf, "_tid.%u", tsk->pid);
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, 1, NULL);
+ keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto error;
@@ -177,7 +180,8 @@ int install_process_keyring(struct task_struct *tsk)
if (!tsk->signal->process_keyring) {
sprintf(buf, "_pid.%u", tsk->tgid);
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, 1, NULL);
+ keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto error;
@@ -208,6 +212,7 @@ error:
static int install_session_keyring(struct task_struct *tsk,
struct key *keyring)
{
+ unsigned long flags;
struct key *old;
char buf[20];
@@ -217,7 +222,12 @@ static int install_session_keyring(struct task_struct *tsk,
if (!keyring) {
sprintf(buf, "_ses.%u", tsk->tgid);
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, 1, NULL);
+ flags = KEY_ALLOC_QUOTA_OVERRUN;
+ if (tsk->signal->session_keyring)
+ flags = KEY_ALLOC_IN_QUOTA;
+
+ keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ flags, NULL);
if (IS_ERR(keyring))
return PTR_ERR(keyring);
}
@@ -390,6 +400,8 @@ key_ref_t search_process_keyrings(struct key_type *type,
struct request_key_auth *rka;
key_ref_t key_ref, ret, err;
+ might_sleep();
+
/* we want to return -EAGAIN or -ENOKEY if any of the keyrings were
* searchable, but we failed to find a key or we found a negative key;
* otherwise we want to return a sample error (probably -EACCES) if
@@ -495,27 +507,35 @@ key_ref_t search_process_keyrings(struct key_type *type,
*/
if (context->request_key_auth &&
context == current &&
- type != &key_type_request_key_auth &&
- key_validate(context->request_key_auth) == 0
+ type != &key_type_request_key_auth
) {
- rka = context->request_key_auth->payload.data;
+ /* defend against the auth key being revoked */
+ down_read(&context->request_key_auth->sem);
- key_ref = search_process_keyrings(type, description, match,
- rka->context);
+ if (key_validate(context->request_key_auth) == 0) {
+ rka = context->request_key_auth->payload.data;
- if (!IS_ERR(key_ref))
- goto found;
+ key_ref = search_process_keyrings(type, description,
+ match, rka->context);
- switch (PTR_ERR(key_ref)) {
- case -EAGAIN: /* no key */
- if (ret)
+ up_read(&context->request_key_auth->sem);
+
+ if (!IS_ERR(key_ref))
+ goto found;
+
+ switch (PTR_ERR(key_ref)) {
+ case -EAGAIN: /* no key */
+ if (ret)
+ break;
+ case -ENOKEY: /* negative key */
+ ret = key_ref;
break;
- case -ENOKEY: /* negative key */
- ret = key_ref;
- break;
- default:
- err = key_ref;
- break;
+ default:
+ err = key_ref;
+ break;
+ }
+ } else {
+ up_read(&context->request_key_auth->sem);
}
}
@@ -717,7 +737,8 @@ long join_session_keyring(const char *name)
keyring = find_keyring_by_name(name, 0);
if (PTR_ERR(keyring) == -ENOKEY) {
/* not found - try and create a new one */
- keyring = keyring_alloc(name, tsk->uid, tsk->gid, 0, NULL);
+ keyring = keyring_alloc(name, tsk->uid, tsk->gid, tsk,
+ KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto error2;
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index f030a0ccbb9..f573ac189a0 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -1,6 +1,6 @@
/* request_key.c: request a key from userspace
*
- * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2004-6 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -33,7 +33,8 @@ DECLARE_WAIT_QUEUE_HEAD(request_key_conswq);
*/
static int call_sbin_request_key(struct key *key,
struct key *authkey,
- const char *op)
+ const char *op,
+ void *aux)
{
struct task_struct *tsk = current;
key_serial_t prkey, sskey;
@@ -48,7 +49,8 @@ static int call_sbin_request_key(struct key *key,
/* allocate a new session keyring */
sprintf(desc, "_req.%u", key->serial);
- keyring = keyring_alloc(desc, current->fsuid, current->fsgid, 1, NULL);
+ keyring = keyring_alloc(desc, current->fsuid, current->fsgid, current,
+ KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto error_alloc;
@@ -125,7 +127,9 @@ error_alloc:
*/
static struct key *__request_key_construction(struct key_type *type,
const char *description,
- const char *callout_info)
+ const char *callout_info,
+ void *aux,
+ unsigned long flags)
{
request_key_actor_t actor;
struct key_construction cons;
@@ -133,11 +137,12 @@ static struct key *__request_key_construction(struct key_type *type,
struct key *key, *authkey;
int ret, negated;
- kenter("%s,%s,%s", type->name, description, callout_info);
+ kenter("%s,%s,%s,%lx", type->name, description, callout_info, flags);
/* create a key and add it to the queue */
key = key_alloc(type, description,
- current->fsuid, current->fsgid, KEY_POS_ALL, 0);
+ current->fsuid, current->fsgid, current, KEY_POS_ALL,
+ flags);
if (IS_ERR(key))
goto alloc_failed;
@@ -161,7 +166,7 @@ static struct key *__request_key_construction(struct key_type *type,
actor = call_sbin_request_key;
if (type->request_key)
actor = type->request_key;
- ret = actor(key, authkey, "create");
+ ret = actor(key, authkey, "create", aux);
if (ret < 0)
goto request_failed;
@@ -255,16 +260,18 @@ alloc_failed:
*/
static struct key *request_key_construction(struct key_type *type,
const char *description,
+ const char *callout_info,
+ void *aux,
struct key_user *user,
- const char *callout_info)
+ unsigned long flags)
{
struct key_construction *pcons;
struct key *key, *ckey;
DECLARE_WAITQUEUE(myself, current);
- kenter("%s,%s,{%d},%s",
- type->name, description, user->uid, callout_info);
+ kenter("%s,%s,{%d},%s,%lx",
+ type->name, description, user->uid, callout_info, flags);
/* see if there's such a key under construction already */
down_write(&key_construction_sem);
@@ -280,7 +287,8 @@ static struct key *request_key_construction(struct key_type *type,
}
/* see about getting userspace to construct the key */
- key = __request_key_construction(type, description, callout_info);
+ key = __request_key_construction(type, description, callout_info, aux,
+ flags);
error:
kleave(" = %p", key);
return key;
@@ -387,14 +395,17 @@ static void request_key_link(struct key *key, struct key *dest_keyring)
struct key *request_key_and_link(struct key_type *type,
const char *description,
const char *callout_info,
- struct key *dest_keyring)
+ void *aux,
+ struct key *dest_keyring,
+ unsigned long flags)
{
struct key_user *user;
struct key *key;
key_ref_t key_ref;
- kenter("%s,%s,%s,%p",
- type->name, description, callout_info, dest_keyring);
+ kenter("%s,%s,%s,%p,%p,%lx",