From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BB62C43387 for ; Fri, 14 Dec 2018 19:05:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF2152080F for ; Fri, 14 Dec 2018 19:05:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730642AbeLNTFc (ORCPT ); Fri, 14 Dec 2018 14:05:32 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:59290 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730491AbeLNTFc (ORCPT ); Fri, 14 Dec 2018 14:05:32 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::bf5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 5C8B214DF1C9A; Fri, 14 Dec 2018 11:05:31 -0800 (PST) Date: Fri, 14 Dec 2018 11:05:30 -0800 (PST) Message-Id: <20181214.110530.1362956449531434869.davem@davemloft.net> To: cpaasch@apple.com Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, bhole_prashant_q7@lab.ntt.co.jp, tyhicks@canonical.com, eric.dumazet@gmail.com, edumazet@google.com Subject: Re: [PATCH 4.14 09/89] net: Prevent invalid access to skb->prev in __qdisc_drop_all From: David Miller In-Reply-To: <20181214155226.GJ41383@MacBook-Pro-19.local> References: <20181214115729.658859279@linuxfoundation.org> <20181214115730.135586551@linuxfoundation.org> <20181214155226.GJ41383@MacBook-Pro-19.local> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 14 Dec 2018 11:05:31 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christoph Paasch Date: Fri, 14 Dec 2018 07:52:26 -0800 > I don't think this patch needs to be backported. I haven't hit this panic on > v4.14.x (although, I only have been using v4.14.79 for now - not yet the > latest one). And the commits that seem to have introduced the issue haven't > been backported either AFAICS. That being said, I don't think a backport > would cause any side-effects. > > Or have you seen reports of this panic in the stable branches? > > (same for the other stable branches v4.4,... - cfr., the other mails > regarding this patch here) I was being ultra paranoid when I decided to submit this to 4.14 too, and as Eric says it does not harm.