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

4b14752e · Paul Moore <[email protected]> · 2017-12-05 17:17:43 -05:00

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 <[email protected]>
Signed-off-by: Paul Moore <[email protected]>
Acked-by: Stephen Smalley <[email protected]>
Reviewed-by: James Morris <[email protected]>

Commit: 4b14752ec4e0d87126e636384cf37c8dd9df157c
Parents: ef28df55

Changes

1 files changed · +3 −0

File	Status	Add	Del	Content
security/selinux/ss/services.c	modified	+3	−0	View file

security/selinux/ss/services.c

View file

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index d05496d..8900ea5 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -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;