Merge branch 'stable-3.14' of git://git.infradead.org/users/pcmoore/selinux into for-linus

security/selinux/ss/services.c

@@ -1232,6 +1232,10 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
 	struct context context;
 	int rc = 0;
 
+	/* An empty security context is never valid. */
+	if (!scontext_len)
+		return -EINVAL;
+
 	if (!ss_initialized) {
 		int i;