--- net/can/bcm.c

+++ net/can/bcm.c

@@ -1425,9 +1425,14 @@ static int bcm_init(struct sock *sk)

static int bcm_release(struct socket *sock)

{

struct sock *sk = sock->sk;

- struct bcm_sock *bo = bcm_sk(sk);

+ struct bcm_sock *bo;

struct bcm_op *op, *next;

+ if (sk == NULL)

+ return 0;

+

+ bo = bcm_sk(sk);

+

/* remove bcm_ops, timer, rx_unregister(), etc. */

unregister_netdevice_notifier(&bo->notifier);