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 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4b14752ec4e0d87126e636384cf37c8dd9df157c Mon Sep 17 00:00:00 2001
From: Paul Moore <paul@xxxxxxxxxxxxxx>
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@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
@@ -854,6 +854,9 @@ 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@xxxxxxxxxxxxxx are
queue-4.9/selinux-skip-bounded-transition-processing-if-the-policy-isn-t-loaded.patch
queue-4.9/selinux-ensure-the-context-is-nul-terminated-in-security_context_to_sid_core.patch