UBUNTU: SAUCE: apparmor: Fix: refcount bug when inserting label update that transitions ns

We already have a refcount on l, and aa_label_insert() returns another
refcount so we need to make sure to put the extra one.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

security/apparmor/label.c

@@ -1875,7 +1875,8 @@ static struct aa_label *__label_update(struct aa_label *label)
 	if (tmp != l) {
 		aa_put_label(l);
 		l = tmp;
-	}
+	} else
+		aa_put_label(l);	/* extra ref */
 
 	return l;
 }