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