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

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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>
This commit is contained in:
Paul Moore 2017-12-05 17:17:43 -05:00
parent ef28df55ac
commit 4b14752ec4
1 changed files with 3 additions and 0 deletions
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3
security/selinux/ss/services.c
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@ -867,6 +867,9 @@ int security_bounded_transition(u32 old_sid, u32 new_sid)
int index;
int rc;
if (!ss_initialized)
return 0;
read_lock(&policy_rwlock);
rc = -EINVAL;