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-rw-r--r--include/linux/security.h7
-rw-r--r--kernel/sysctl.c2
-rw-r--r--mm/Kconfig1
-rw-r--r--security/Makefile3
-rw-r--r--security/keys/keyctl.c12
-rw-r--r--security/min_addr.c2
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();