From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933823AbcKMLZS (ORCPT ); Sun, 13 Nov 2016 06:25:18 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:35834 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933737AbcKMLZO (ORCPT ); Sun, 13 Nov 2016 06:25:14 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anoob Soman , "David S. Miller" Subject: [PATCH 4.4 12/34] packet: call fanout_release, while UNREGISTERING a netdev Date: Sun, 13 Nov 2016 12:24:44 +0100 Message-Id: <20161113112400.605992559@linuxfoundation.org> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161113112400.008903838@linuxfoundation.org> References: <20161113112400.008903838@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anoob Soman [ Upstream commit 6664498280cf17a59c3e7cf1a931444c02633ed1 ] If a socket has FANOUT sockopt set, a new proto_hook is registered as part of fanout_add(). When processing a NETDEV_UNREGISTER event in af_packet, __fanout_unlink is called for all sockets, but prot_hook which was registered as part of fanout_add is not removed. Call fanout_release, on a NETDEV_UNREGISTER, which removes prot_hook and removes fanout from the fanout_list. This fixes BUG_ON(!list_empty(&dev->ptype_specific)) in netdev_run_todo() Signed-off-by: Anoob Soman Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/packet/af_packet.c | 1 + 1 file changed, 1 insertion(+) --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -3855,6 +3855,7 @@ static int packet_notifier(struct notifi } if (msg == NETDEV_UNREGISTER) { packet_cached_dev_reset(po); + fanout_release(sk); po->ifindex = -1; if (po->prot_hook.dev) dev_put(po->prot_hook.dev);