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>
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@ -795,7 +795,7 @@ static void l2cap_sock_kill(struct sock *sk)
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static int l2cap_sock_shutdown(struct socket *sock, int how)
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static int l2cap_sock_shutdown(struct socket *sock, int how)
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{
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{
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struct sock *sk = sock->sk;
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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struct l2cap_chan *chan;
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int err = 0;
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int err = 0;
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BT_DBG("sock %p, sk %p", sock, sk);
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BT_DBG("sock %p, sk %p", sock, sk);
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@ -803,6 +803,8 @@ static int l2cap_sock_shutdown(struct socket *sock, int how)
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if (!sk)
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if (!sk)
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return 0;
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return 0;
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chan = l2cap_pi(sk)->chan;
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lock_sock(sk);
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lock_sock(sk);
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if (!sk->sk_shutdown) {
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if (!sk->sk_shutdown) {
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if (chan->mode == L2CAP_MODE_ERTM)
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if (chan->mode == L2CAP_MODE_ERTM)
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