From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Add missing socket check in can/bcm release. Date: Tue, 19 Apr 2011 23:30:01 -0400 Message-ID: <20110420033001.GA32635@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: netdev@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:12379 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753430Ab1DTDaF (ORCPT ); Tue, 19 Apr 2011 23:30:05 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p3K3U3sf022369 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 19 Apr 2011 23:30:04 -0400 Received: from gelk.kernelslacker.org (ovpn-113-123.phx2.redhat.com [10.3.113.123]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id p3K3U2DS022364 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 19 Apr 2011 23:30:03 -0400 Received: from gelk.kernelslacker.org (gelk [127.0.0.1]) by gelk.kernelslacker.org (8.14.4/8.14.4) with ESMTP id p3K3U18M000421 for ; Tue, 19 Apr 2011 23:30:01 -0400 Received: (from davej@localhost) by gelk.kernelslacker.org (8.14.4/8.14.4/Submit) id p3K3U1p6000420 for netdev@vger.kernel.org; Tue, 19 Apr 2011 23:30:01 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: We can get here with a NULL socket argument passed from userspace, so we need to handle it accordingly. Signed-off-by: Dave Jones diff --git a/net/can/bcm.c b/net/can/bcm.c index 57b1aed..8a6a05e 100644 --- a/net/can/bcm.c +++ b/net/can/bcm.c @@ -1427,9 +1427,14 @@ 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);