Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  Keys: KEYCTL_SESSION_TO_PARENT needs TIF_NOTIFY_RESUME architecture support
  NOMMU: Optimise away the {dac_,}mmap_min_addr tests
  security/min_addr.c: make init_mmap_min_addr() static
  keys: PTR_ERR return of wrong pointer in keyctl_get_security()

6 files changed, 24 insertions, 3 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 466cbadbd1e..2c627d361c0 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -95,8 +95,13 @@ struct seq_file;
 extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);
 extern int cap_netlink_recv(struct sk_buff *skb, int cap);
 
+#ifdef CONFIG_MMU
 extern unsigned long mmap_min_addr;
 extern unsigned long dac_mmap_min_addr;
+#else
+#define dac_mmap_min_addr	0UL
+#endif
+
 /*
  * Values used in the task_security_ops calls
  */
@@ -121,6 +126,7 @@ struct request_sock;
 #define LSM_UNSAFE_PTRACE	2
 #define LSM_UNSAFE_PTRACE_CAP	4
 
+#ifdef CONFIG_MMU
 /*
  * If a hint addr is less than mmap_min_addr change hint to be as
  * low as possible but still greater than mmap_min_addr
@@ -135,6 +141,7 @@ static inline unsigned long round_hint_to_min(unsigned long hint)
 }
 extern int mmap_min_addr_handler(struct ctl_table *table, int write,
 				 void __user *buffer, size_t *lenp, loff_t *ppos);
+#endif
 
 #ifdef CONFIG_SECURITY
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 6665761c006..8a68b244846 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1214,6 +1214,7 @@ static struct ctl_table vm_table[] = {
 		.proc_handler	= proc_dointvec_jiffies,
 	},
 #endif
+#ifdef CONFIG_MMU
 	{
 		.procname	= "mmap_min_addr",
 		.data		= &dac_mmap_min_addr,
@@ -1221,6 +1222,7 @@ static struct ctl_table vm_table[] = {
 		.mode		= 0644,
 		.proc_handler	= mmap_min_addr_handler,
 	},
+#endif
 #ifdef CONFIG_NUMA
 	{
 		.procname	= "numa_zonelist_order",
diff --git a/mm/Kconfig b/mm/Kconfig
index 43ea8c3a2bb..ee9f3e0f2b6 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -221,6 +221,7 @@ config KSM
 
 config DEFAULT_MMAP_MIN_ADDR
         int "Low address space to protect from user allocation"
+	depends on MMU
         default 4096
         help
 	  This is the portion of low virtual memory which should be protected
diff --git a/security/Makefile b/security/Makefile
index bb44e350c61..da20a193c8d 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -8,7 +8,8 @@ subdir-$(CONFIG_SECURITY_SMACK)		+= smack
 subdir-$(CONFIG_SECURITY_TOMOYO)        += tomoyo
 
 # always enable default capabilities
-obj-y		+= commoncap.o min_addr.o
+obj-y					+= commoncap.o
+obj-$(CONFIG_MMU)			+= min_addr.o
 
 # Object file lists
 obj-$(CONFIG_SECURITY)			+= security.o capability.o
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 06ec722897b..e9c2e7c584d 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1194,7 +1194,7 @@ long keyctl_get_security(key_serial_t keyid,
 		 * have the authorisation token handy */
 		instkey = key_get_instantiation_authkey(keyid);
 		if (IS_ERR(instkey))
-			return PTR_ERR(key_ref);
+			return PTR_ERR(instkey);
 		key_put(instkey);
 
 		key_ref = lookup_user_key(keyid, KEY_LOOKUP_PARTIAL, 0);
@@ -1236,6 +1236,7 @@ long keyctl_get_security(key_serial_t keyid,
  */
 long keyctl_session_to_parent(void)
 {
+#ifdef TIF_NOTIFY_RESUME
 	struct task_struct *me, *parent;
 	const struct cred *mycred, *pcred;
 	struct cred *cred, *oldcred;
@@ -1326,6 +1327,15 @@ not_permitted:
 error_keyring:
 	key_ref_put(keyring_r);
 	return ret;
+
+#else /* !TIF_NOTIFY_RESUME */
+	/*
+	 * To be removed when TIF_NOTIFY_RESUME has been implemented on
+	 * m68k/xtensa
+	 */
+#warning TIF_NOTIFY_RESUME not implemented
+	return -EOPNOTSUPP;
+#endif /* !TIF_NOTIFY_RESUME */
 }
 
 /*****************************************************************************/
diff --git a/security/min_addr.c b/security/min_addr.c
index fc43c9d3708..e86f297522b 100644
--- a/security/min_addr.c
+++ b/security/min_addr.c
@@ -43,7 +43,7 @@ int mmap_min_addr_handler(struct ctl_table *table, int write,
 	return ret;
 }
 
-int __init init_mmap_min_addr(void)
+static int __init init_mmap_min_addr(void)
 {
 	update_mmap_min_addr();