selinux: fix GPF on invalid policy
authorStephen Smalley <sds@tycho.nsa.gov>
Wed, 9 Jan 2019 15:55:10 +0000 (10:55 -0500)
committerPaul Moore <paul@paul-moore.com>
Fri, 11 Jan 2019 01:23:05 +0000 (20:23 -0500)
commit5b0e7310a2a33c06edc7eb81ffc521af9b2c5610
tree7026349a619080870f87e1648ae8387c1ef574c1
parentee1a84fdfeedfd7362e9a8a8f15fedc3482ade2d
selinux: fix GPF on invalid policy

levdatum->level can be NULL if we encounter an error while loading
the policy during sens_read prior to initializing it.  Make sure
sens_destroy handles that case correctly.

Reported-by: syzbot+6664500f0f18f07a5c0e@syzkaller.appspotmail.com
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
security/selinux/ss/policydb.c