Patch "selinux: skip bounded transition processing if the policy isn't loaded" has been added to the 4.15-stable tree

Patch "selinux: skip bounded transition processing if the policy isn't loaded" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    selinux: skip bounded transition processing if the policy isn't loaded

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     selinux-skip-bounded-transition-processing-if-the-policy-isn-t-loaded.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 4b14752ec4e0d87126e636384cf37c8dd9df157c Mon Sep 17 00:00:00 2001
From: Paul Moore <paul@paul-moore.com>
Date: Tue, 5 Dec 2017 17:17:43 -0500
Subject: selinux: skip bounded transition processing if the policy isn't loaded

From: Paul Moore <paul@paul-moore.com>

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@googlegroups.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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;


Patches currently in stable-queue which might be from paul@paul-moore.com are

queue-4.15/selinux-skip-bounded-transition-processing-if-the-policy-isn-t-loaded.patch
queue-4.15/selinux-ensure-the-context-is-nul-terminated-in-security_context_to_sid_core.patch