UBUNTU: SAUCE: apparmor: null profiles should inherit parent control flags

null profiles that don't have the same control flags as the parent
behave in unexpected ways and can cause failures.

BugLink: http://bugs.launchpad.net/bugs/1656121Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

security/apparmor/policy.c

@@ -350,6 +350,7 @@ struct aa_profile *aa_null_profile(struct aa_profile *parent, bool hat,
 	profile->label.flags |= FLAG_NULL;
 	if (hat)
 		profile->label.flags |= FLAG_HAT;
+	profile->path_flags = parent->path_flags;
 
 	/* released on free_profile */
 	rcu_assign_pointer(profile->parent, aa_get_profile(parent));