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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 98AEFC433DF for ; Tue, 11 Aug 2020 12:07:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A02020756 for ; Tue, 11 Aug 2020 12:07:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728888AbgHKMHI (ORCPT ); Tue, 11 Aug 2020 08:07:08 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:43629 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728865AbgHKMHG (ORCPT ); Tue, 11 Aug 2020 08:07:06 -0400 Received: by mail-io1-f72.google.com with SMTP id f19so9547075iol.10 for ; Tue, 11 Aug 2020 05:07:05 -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=HzQLLDC1IVxhcp7/2UGjOxAx/is2c+2Svqmxvr49UPw=; b=Ewz7UjvAb/d0FZO08AqjEyYxu3MYO6U6BDh4V3ff6Fvor102/jEF6ZYVOL+4fJoJkh GadJJdfRX8DaifZ/liNzNADspNZiLo4nR96B7EIUTeW8vWeH4PpJs8GtYCmcGTqfbB1x uHzKCZMOBDCHR9glDBoWdcf3UMjQOdPEeTPs0LZj3xdCfmbkvp5L/FmDJQoWPnci9+Pz C8tN725UZ6Gp5whubs4pzXWzAw7JuTqzBR7aWDlD3N0ymRlt1ZFwW1vEz8nrcsg61NCD HZSnrYzbL8OtKy5VzZi+vl4w1MKaOWc1rv5k28mLrsvJG5xZSe2MO77I/vSk4mH9WNh/ C2FA== X-Gm-Message-State: AOAM532EXycgWJD9ZxjdZQ1o3dEmU7lOqhamG5ECHYKpiQ04Gp3dYG5n Us31htFDWwKjucvDWGVfS350CdOkJhI9I24SytUmVEQovjjZ X-Google-Smtp-Source: ABdhPJxzQS39hv4MK29/Jx/x0y/5Yh1oJ5MVyHs9Ac+UcQli1on3FM41GDUlr03BCZqL5G33nbAGhCmN34y5wng1V3Lzp7VBKGAJ MIME-Version: 1.0 X-Received: by 2002:a92:b6cb:: with SMTP id m72mr14759930ill.276.1597147624930; Tue, 11 Aug 2020 05:07:04 -0700 (PDT) Date: Tue, 11 Aug 2020 05:07:04 -0700 In-Reply-To: <000000000000cf1be105a8ffc44c@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d683c505ac98e87e@google.com> Subject: Re: possible deadlock in dev_mc_unsync From: syzbot To: ap420073@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit be74294ffa24f5fbc0d6643842e3e095447e17a2 Author: Cong Wang Date: Fri Jun 26 18:24:22 2020 +0000 net: get rid of lockdep_set_class_and_subclass() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=110b0fc2900000 start commit: 4a21185c Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: net kernel config: https://syzkaller.appspot.com/x/.config?x=bf3aec367b9ab569 dashboard link: https://syzkaller.appspot.com/bug?extid=08e3d39f3eb8643216be syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d2b1c5100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17aed775100000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: net: get rid of lockdep_set_class_and_subclass() For information about bisection process see: https://goo.gl/tpsmEJ#bisection