diff options
| -rw-r--r-- | include/linux/cred.h | 13 | ||||
| -rw-r--r-- | include/linux/selinux.h | 9 | ||||
| -rw-r--r-- | security/selinux/exports.c | 6 |
3 files changed, 23 insertions, 5 deletions
diff --git a/include/linux/cred.h b/include/linux/cred.h index 24520a539c6..fb371601a3b 100644 --- a/include/linux/cred.h +++ b/include/linux/cred.h @@ -15,6 +15,7 @@ #include <linux/capability.h> #include <linux/init.h> #include <linux/key.h> +#include <linux/selinux.h> #include <asm/atomic.h> struct user_struct; @@ -182,11 +183,13 @@ static inline bool creds_are_invalid(const struct cred *cred) if (atomic_read(&cred->usage) < atomic_read(&cred->subscribers)) return true; #ifdef CONFIG_SECURITY_SELINUX - if ((unsigned long) cred->security < PAGE_SIZE) - return true; - if ((*(u32*)cred->security & 0xffffff00) == - (POISON_FREE << 24 | POISON_FREE << 16 | POISON_FREE << 8)) - return true; + if (selinux_is_enabled()) { + if ((unsigned long) cred->security < PAGE_SIZE) + return true; + if ((*(u32 *)cred->security & 0xffffff00) == + (POISON_FREE << 24 | POISON_FREE << 16 | POISON_FREE << 8)) + return true; + } #endif return false; } diff --git a/include/linux/selinux.h b/include/linux/selinux.h index 20f965d4b04..223d06a6feb 100644 --- a/include/linux/selinux.h +++ b/include/linux/selinux.h @@ -61,6 +61,11 @@ void selinux_secmark_refcount_inc(void); * existing SECMARK targets has been removed/flushed. */ void selinux_secmark_refcount_dec(void); + +/** + * selinux_is_enabled - is SELinux enabled? + */ +bool selinux_is_enabled(void); #else static inline int selinux_string_to_sid(const char *str, u32 *sid) @@ -84,6 +89,10 @@ static inline void selinux_secmark_refcount_dec(void) return; } +static bool selinux_is_enabled(void) +{ + return false; +} #endif /* CONFIG_SECURITY_SELINUX */ #endif /* _LINUX_SELINUX_H */ diff --git a/security/selinux/exports.c b/security/selinux/exports.c index c73aeaa008e..c0a454aee1e 100644 --- a/security/selinux/exports.c +++ b/security/selinux/exports.c @@ -63,3 +63,9 @@ void selinux_secmark_refcount_dec(void) atomic_dec(&selinux_secmark_refcount); } EXPORT_SYMBOL_GPL(selinux_secmark_refcount_dec); + +bool selinux_is_enabled(void) +{ + return selinux_enabled; +} +EXPORT_SYMBOL_GPL(selinux_is_enabled); |