Bluetooth: Do not dereference zero sk

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
git-mirror · Feb 16, 2012 · 7ddb6e0 · 7ddb6e0
1 parent 46479e6
commit 7ddb6e0
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
@@ -795,14 +795,16 @@ static void l2cap_sock_kill(struct sock *sk)
 static int l2cap_sock_shutdown(struct socket *sock, int how)
 {
 	struct sock *sk = sock->sk;
-	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+	struct l2cap_chan *chan;
 	int err = 0;
 
 	BT_DBG("sock %p, sk %p", sock, sk);
 
 	if (!sk)
 		return 0;
 
+	chan = l2cap_pi(sk)->chan;
+
 	lock_sock(sk);
 	if (!sk->sk_shutdown) {
 		if (chan->mode == L2CAP_MODE_ERTM)