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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 C2FABC432C0 for ; Sat, 30 Nov 2019 06:52:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9835120725 for ; Sat, 30 Nov 2019 06:52:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726008AbfK3GwC (ORCPT ); Sat, 30 Nov 2019 01:52:02 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:47533 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725783AbfK3GwB (ORCPT ); Sat, 30 Nov 2019 01:52:01 -0500 Received: by mail-il1-f199.google.com with SMTP id d4so22106943ile.14 for ; Fri, 29 Nov 2019 22:52:01 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=LH+oNIdXBIwxjg57W3FD/l3zRLVtt0ZQgS0IxdqkKI4=; b=RkaiTDLl09m/B8V8dt6z5PUkZ9+OcIrlzDNgCKyOuC/uJ0pqaSgopokSKPZgrazlAv B2y8qE24Wsvm7p4IvTd3hXK5hO4xbm08k6Mj4vhDFaCW2+I9573wDjX9qVk2KSKnY4EO uJrhOPjHfmt6zsrwwkPTF2cdT+JPxJz5V70yeyiTG18wKXlpwKkBbmfQg7OXB5kYVsWI otYKldC/LsVs5u1XqClocqY7vRJbysctbjkiI+Jcf129nAzBmtjywCqMF5lgbm5oYR7S iUFn4CfN9dImDKbjmP0Hgf+zKxYTuxZ6d6JTOd4xznwoii2Gbm61JDwjpOXiMDCbnv+I c4fQ== X-Gm-Message-State: APjAAAWM4mUlzTDpHB+RDtvdQnTXi91Cqf/r7YuWZ6yO5+6DdxfpKRBR vDkcIU39CojI2Om4MkFbXDVapLv8MF+Va/t0DG+4X0ne19YA X-Google-Smtp-Source: APXvYqzqoowMlvXf8CnOvya7QGH5LnuwTEQxwGpMIbMv3o9ZqFbpzbnW4ixzkc+NCt/1cA8yqhHjXrz1y4jgMjrpQgUS8JclaVsN MIME-Version: 1.0 X-Received: by 2002:a6b:6e05:: with SMTP id d5mr11393518ioh.90.1575096721095; Fri, 29 Nov 2019 22:52:01 -0800 (PST) Date: Fri, 29 Nov 2019 22:52:01 -0800 In-Reply-To: <001a113f39820d16d50567379661@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008c415905988ac808@google.com> Subject: Re: WARNING in tcp_enter_loss (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, jmorris@namei.org, kaber@trash.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, ncardwell@google.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, ycheng@google.com, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has bisected this bug to: commit a0370b3f3f2cfb8b424b04c0545414abaa53f5ee Author: Yuchung Cheng Date: Fri Jan 13 06:11:36 2017 +0000 tcp: enable RACK loss detection to trigger recovery bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=114cbdf2e00000 start commit: 0644f186 Merge tag 'for_linus' of git://git.kernel.org/pub.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=134cbdf2e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=154cbdf2e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=61c12b53c2a25ec4 dashboard link: https://syzkaller.appspot.com/bug?extid=c5a3099b94cbdd9cd6da syz repro: https://syzkaller.appspot.com/x/repro.syz?x=112146e7800000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1317f95b800000 Reported-by: syzbot+c5a3099b94cbdd9cd6da@syzkaller.appspotmail.com Fixes: a0370b3f3f2c ("tcp: enable RACK loss detection to trigger recovery") For information about bisection process see: https://goo.gl/tpsmEJ#bisection