apparmor: fix oops in profile_unpack() when policy_db is not present
BugLink: http://bugs.launchpad.net/bugs/1592547
If unpack_dfa() returns NULL due to the dfa not being present,
profile_unpack() is not checking if the dfa is not present (NULL).
Signed-off-by: John Johansen <john.johansen@canonical.com>
diff --git a/security/apparmor/policy_unpack.c b/security/apparmor/policy_unpack.c
index 951ae46..b9b1c66 100644
--- a/security/apparmor/policy_unpack.c
+++ b/security/apparmor/policy_unpack.c
@@ -583,6 +583,9 @@
error = PTR_ERR(profile->policy.dfa);
profile->policy.dfa = NULL;
goto fail;
+ } else if (!profile->policy.dfa) {
+ error = -EPROTO;
+ goto fail;
}
if (!unpack_u32(e, &profile->policy.start[0], "start"))
/* default start state */