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=-7.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 F28E5C43215 for ; Mon, 2 Dec 2019 18:39:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C846F20718 for ; Mon, 2 Dec 2019 18:39:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Td5CxMCo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727555AbfLBSjS (ORCPT ); Mon, 2 Dec 2019 13:39:18 -0500 Received: from mail-qk1-f196.google.com ([209.85.222.196]:35695 "EHLO mail-qk1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727464AbfLBSjR (ORCPT ); Mon, 2 Dec 2019 13:39:17 -0500 Received: by mail-qk1-f196.google.com with SMTP id v23so581661qkg.2; Mon, 02 Dec 2019 10:39:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=7AahTmyRrRRUN9KLoDWPPdZMRiFouQHG/IidjTUKsJw=; b=Td5CxMCoPWDKuaDcEdMjcqTN0vf3CAF/Zjqj8fxFjZLzpY1VfH/+PukGoU53giP3Nu Axn00akXjCoU+4PHFyaJNcocM2XKHkRogTkMArVSVGOjOCEkGNGQ0vK6vSd4cPD/iV97 bIm2uaxupDqAxFX1DfZafGOXYodXggYv3NwimWlgAlUi8pWJ7wEigTdS1nihZmk/lBE2 srrTy1AQvRMl5ht7rNzVI7aoWCn9KnTSZ0I2Kit/609gTCkq+ZX+53LgL3ntkFrn77o+ UxK6/bcf7vGEEwsbxqKRfZUU8mCWbAWb0Es7s0yTs5Ja9/z+c+BNrlqV0VlWddRwuJYu ZaVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=7AahTmyRrRRUN9KLoDWPPdZMRiFouQHG/IidjTUKsJw=; b=m+GO8hUrrMUQ9UpWRo9ME0qjPmX5iEEY9YWULEUAQa5QFw9la5B2jn2KoHdCaDaUIv K6fLVGGNJLnTiZzs1bmKq/JkMs48A2ozK3exIRnKkOeM721t26eQy05dxIg6GqSE/Ytz Mlma181nOpIn3vCVQKBx72mZEbjkLgvwte4THPsXU7uKbZMp5HqDkAgASq9aqEu0u/Xb vjbwIq4jkbITGbVVCeppFO93gkz7pv7Ec49/7urZiM5DGPHJrRehh1duYKwwFgDMVqQ8 8S6EKgkN5xO8qu0z8GCYsR66xbSZwpd814/2VHItqZ6mFQKS2SqgCujjyYNk3M/q03O3 FNZA== X-Gm-Message-State: APjAAAVRxX6mYRTb4K8g1rXS7sxqu51/Q0xyeuestyxbFmjq/pfzVwUX XhPKfCrCYXv/CveyvmrkCnM= X-Google-Smtp-Source: APXvYqwMjunymDtO2f1xnW0eImKIiMUw5EZDJyLFOcySm5duaoG775SJvqdzcK/t1TJ/MGuAXydO/Q== X-Received: by 2002:a37:658f:: with SMTP id z137mr273840qkb.234.1575311956265; Mon, 02 Dec 2019 10:39:16 -0800 (PST) Received: from localhost.localdomain ([168.181.48.195]) by smtp.gmail.com with ESMTPSA id b6sm194111qtp.5.2019.12.02.10.39.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2019 10:39:15 -0800 (PST) Received: by localhost.localdomain (Postfix, from userid 1000) id C47FAC1B68; Mon, 2 Dec 2019 15:39:12 -0300 (-03) Date: Mon, 2 Dec 2019 15:39:12 -0300 From: Marcelo Ricardo Leitner To: Dmitry Vyukov Cc: syzbot , David Miller , Alexey Kuznetsov , LKML , linux-sctp@vger.kernel.org, Xin Long , mvohra@vmware.com, netdev , Neil Horman , syzkaller-bugs , William Tu , Vladislav Yasevich , websitedesignservices4u@gmail.com, Hideaki YOSHIFUJI Subject: Re: kernel BUG at net/core/skbuff.c:LINE! (3) Message-ID: <20191202183912.GC377783@localhost.localdomain> References: <001a114372a6074e6505642b7f72@google.com> <000000000000039751059891760e@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Sat, Nov 30, 2019 at 04:37:56PM +0100, Dmitry Vyukov wrote: > On Sat, Nov 30, 2019 at 3:50 PM syzbot > wrote: > > > > syzbot has bisected this bug to: > > > > commit 84e54fe0a5eaed696dee4019c396f8396f5a908b > > Author: William Tu > > Date: Tue Aug 22 16:40:28 2017 +0000 > > > > gre: introduce native tunnel support for ERSPAN > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=158a2f86e00000 > > start commit: f9f1e414 Merge tag 'for-linus-4.16-rc1-tag' of git://git.k.. > > git tree: upstream > > final crash: https://syzkaller.appspot.com/x/report.txt?x=178a2f86e00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=138a2f86e00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=34a80ee1ac29767b > > dashboard link: https://syzkaller.appspot.com/bug?extid=b2bf2652983d23734c5c > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147bfebd800000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d8d543800000 > > > > Reported-by: syzbot+b2bf2652983d23734c5c@syzkaller.appspotmail.com > > Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") > > > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > Humm... the repro contains syz_emit_ethernet, wonder if it's > remote-triggerable... The call trace is still from the tx path. Packet never left the system in this case.