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%3Ba=su...
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