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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 B8923CA9EB5 for ; Mon, 4 Nov 2019 17:33:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C58B20869 for ; Mon, 4 Nov 2019 17:33:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dY+Qnrpm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729006AbfKDRdV (ORCPT ); Mon, 4 Nov 2019 12:33:21 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:45826 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727989AbfKDRdV (ORCPT ); Mon, 4 Nov 2019 12:33:21 -0500 Received: by mail-pf1-f196.google.com with SMTP id z4so6685030pfn.12; Mon, 04 Nov 2019 09:33:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=BgXOsOEc+5cLDboF1XbHuAORCGwi89q1+rP30rGzYf8=; b=dY+QnrpmpYLIF9koIMAIn4yTToGuer/BFwzpa8/QwDMfmVRocfHymQtw2le14cEtyo 12Zo6wmP3z9d6hr0HnJ4bOk1p5NT0D2n7tHz4mO3iql8DcZBYeYNaMG3BgitZhjr3jex YzITZqavRprNmBgm1qyvlvZqQmbomDWlIORE1v58zBf6mSC0MX4KS6/0vdEk2GVtOmOF JusllMgpcSx1oBF9F7PfwHWtdhGdX8W9yWs7EP+O75ZqzGO1661zCdTGx++Xtun2Ofiq 8sOjaeo85yCEdezE2w8gktg+e/j7ToWmlT840gvKliFTorf3c1d98e2jqbSucuIp8sgT ayrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=BgXOsOEc+5cLDboF1XbHuAORCGwi89q1+rP30rGzYf8=; b=L5Nxv2mikybhDxLcolKbL8Db4IVKACOKAQ11IIJSFhmzYpnr2ApFC2lMW/n8yRWM36 NY1Z+2PLpYDyIYGvoZRy/Exl2Z40H2MrBDjfAzTcgH9yJbzHPn7ruVj35JMsZfcj25Y4 MrcgjKJukbnmrrhhQiEcpwz/2JlaWWG0y7t7Zu4em9X7Iw+MxEAJaq0JC0wMICELUbBw rGMaieKDe5jiZAXq+3nBtL6NrJ03Ra/RS7xzgMqCJb4EHlM1IIrlaJhzN33aXJSRrpa6 FQpX6B9lY7sesrpbq7x4fdbMAPCeq2ae7dcgzOM3DI0I05w7H7xGZjS8YhldmdcKngo2 o13g== X-Gm-Message-State: APjAAAVkohv6Wnz6JQrynG9u/LU+hViwkEjQ05cjWv7aoC8WbL9Hx/dn 8ntoefSm1oRIGSNStOXZzCw= X-Google-Smtp-Source: APXvYqxlK27EBxVTkfU6EdXr0TofKiBu6otugZJ2dTA77gcBk3V7uGmAZO65kzAphngDuRu77UgujQ== X-Received: by 2002:a63:595:: with SMTP id 143mr31542800pgf.45.1572888800525; Mon, 04 Nov 2019 09:33:20 -0800 (PST) Received: from ?IPv6:2620:15c:2c1:200:55c7:81e6:c7d8:94b? ([2620:15c:2c1:200:55c7:81e6:c7d8:94b]) by smtp.gmail.com with ESMTPSA id 71sm7584170pfx.107.2019.11.04.09.33.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Nov 2019 09:33:19 -0800 (PST) Subject: Re: Double free of struct sk_buff reported by SLAB_CONSISTENCY_CHECKS with init_on_free To: Thibaut Sautereau , netdev@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: "David S. Miller" , Laura Abbott , Kees Cook , Alexander Potapenko , Andrew Morton , clipos@ssi.gouv.fr References: <20191104170303.GA50361@gandi.net> From: Eric Dumazet Message-ID: <719eebd3-259d-8beb-025a-f2d17c632711@gmail.com> Date: Mon, 4 Nov 2019 09:33:18 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191104170303.GA50361@gandi.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/4/19 9:03 AM, Thibaut Sautereau wrote: > > We first encountered this issue under huge network traffic (system image > download), and I was able to reproduce by simply sending a big packet > with `ping -s 65507 `, which crashes the kernel every single time. > Since you have a repro, could you start a bisection ? Thanks !