can: Add missing socket check in can/bcm release.
We can get here with a NULL socket argument passed from userspace, so we need to handle it accordingly. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1427,9 +1427,14 @@ static int bcm_init(struct sock *sk)
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static int bcm_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct bcm_sock *bo = bcm_sk(sk);
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struct bcm_sock *bo;
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struct bcm_op *op, *next;
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if (sk == NULL)
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return 0;
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bo = bcm_sk(sk);
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/* remove bcm_ops, timer, rx_unregister(), etc. */
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unregister_netdevice_notifier(&bo->notifier);
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