[PATCH 4.15 05/45] selinux: skip bounded transition processing if the policy isnt loaded

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paul Moore <paul@xxxxxxxxxxxxxx>

commit 4b14752ec4e0d87126e636384cf37c8dd9df157c upstream.

We can't do anything reasonable in security_bounded_transition() if we
don't have a policy loaded, and in fact we could run into problems
with some of the code inside expecting a policy.  Fix these problems
like we do many others in security/selinux/ss/services.c by checking
to see if the policy is loaded (ss_initialized) and returning quickly
if it isn't.

Reported-by: syzbot <syzkaller-bugs@xxxxxxxxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Acked-by: Stephen Smalley <sds@xxxxxxxxxxxxx>
Reviewed-by: James Morris <james.l.morris@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 security/selinux/ss/services.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -867,6 +867,9 @@ int security_bounded_transition(u32 old_
 	int index;
 	int rc;
 
+	if (!ss_initialized)
+		return 0;
+
 	read_lock(&policy_rwlock);
 
 	rc = -EINVAL;