[SELINUX]: Fix bug in security_sid_mls_copy

The following fixes a bug where random mem is being tampered with in the
non-mls case; encountered by Jashua Brindle on a gentoo box.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 27ee28c..7eb69a6 100644 (file)
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1841,7 +1841,7 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid)
        u32 len;
        int rc = 0;
 
-       if (!ss_initialized) {
+       if (!ss_initialized || !selinux_mls_enabled) {
                *new_sid = sid;
                goto out;
        }