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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 849A7C43381 for ; Fri, 22 Mar 2019 11:12:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D2CC2082C for ; Fri, 22 Mar 2019 11:12:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728169AbfCVLMC (ORCPT ); Fri, 22 Mar 2019 07:12:02 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:54016 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728141AbfCVLMB (ORCPT ); Fri, 22 Mar 2019 07:12:01 -0400 Received: by mail-io1-f71.google.com with SMTP id w11so1398046iom.20 for ; Fri, 22 Mar 2019 04:12:00 -0700 (PDT) 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=QzfVqyAnN/h+qIVkoR4mNKnETJKDzl2/36aBzpyJRe0=; b=ZsomQs54KbzLRbhb4rzgWcSjpin1C6O34qa3QyzRzWCF6JtbIic3yo9IU0//5b5IxS QMAVUC+aUHlrQHjnAiKrMiiwEG4+uwr5NU332oXw3FTswD1sLueCsbKdSQV4z3yJGLyP 5gOqGbCB08m4zVpEQJgkKh67yZY3U3g9Bldd6t0t6gttUKd53HU84DagplKyG4wdynPo Wx5QIuMxKZ0FaM9vcmJUnBtmMrdmnqBK2SEnJ27wto8yfk9FH/ZfoRDqNdOzIpSXV26j iDQIWo9nDeydi9qpad7be/9Ya2ysr3FSVpi2sCJNogZP//dbW7UYEl9HgIhGzEHxBt4Z z/jA== X-Gm-Message-State: APjAAAWW8lZEKtqLZJWZjjkoKO17pr7+cb2NhF0KY2uhop3PxB1DjHpp 9hm03CgoR/m5ywb++Ar4zcdSWQG45nEbNkIISehFwVl09+3O X-Google-Smtp-Source: APXvYqzEecdmv4P0Pzagq79s/ymGJp5chb959YKwLhsPuRP02GhTqnUfY5R4TZXu5X6rK7uzRrTPquvtolKPvBhNsvlk2oj2pumZ MIME-Version: 1.0 X-Received: by 2002:a6b:510f:: with SMTP id f15mr6476671iob.59.1553253120394; Fri, 22 Mar 2019 04:12:00 -0700 (PDT) Date: Fri, 22 Mar 2019 04:12:00 -0700 In-Reply-To: <000000000000bfd4270578abe88b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007ccc900584acecc1@google.com> Subject: Re: possible deadlock in flush_workqueue (2) From: syzbot To: adilger.kernel@dilger.ca, davem@davemloft.net, jiangshanlai@gmail.com, kuznet@ms2.inr.ac.ru, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, sbrivio@redhat.com, sd@queasysnail.net, syzkaller-bugs@googlegroups.com, tj@kernel.org, tytso@mit.edu, viro@zeniv.linux.org.uk, 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 f547fac624be53ad8b07e9ebca7654a7827ba61b Author: Sabrina Dubroca Date: Fri Oct 12 14:22:47 2018 +0000 ipv6: rate-limit probes for neighbourless routes bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17affd1b200000 start commit: f547fac6 ipv6: rate-limit probes for neighbourless routes git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=146ffd1b200000 console output: https://syzkaller.appspot.com/x/log.txt?x=106ffd1b200000 kernel config: https://syzkaller.appspot.com/x/.config?x=963b24abf3f7c2d8 dashboard link: https://syzkaller.appspot.com/bug?extid=a50c7541a4a55cd49b02 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12097f03400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b55ac5400000 Reported-by: syzbot+a50c7541a4a55cd49b02@syzkaller.appspotmail.com Fixes: f547fac624be ("ipv6: rate-limit probes for neighbourless routes") For information about bisection process see: https://goo.gl/tpsmEJ#bisection