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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 10F41C433FF for ; Mon, 5 Aug 2019 23:59:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9FCA20825 for ; Mon, 5 Aug 2019 23:59:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730037AbfHEX7C (ORCPT ); Mon, 5 Aug 2019 19:59:02 -0400 Received: from mail-ot1-f69.google.com ([209.85.210.69]:51567 "EHLO mail-ot1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728483AbfHEX7C (ORCPT ); Mon, 5 Aug 2019 19:59:02 -0400 Received: by mail-ot1-f69.google.com with SMTP id h12so47330233otn.18 for ; Mon, 05 Aug 2019 16:59:01 -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=cCEYw1YNz6YzHWfgF679x03NeagqCuKTljhuC5ujasE=; b=anQkQ6CSrSbAcHcCzaPdcUYb34osMDK8xAMkzco4h08KozPT/HOfv0qLFWHwb6V3ye 9OiIW0UFQ1ekJifnoJRxXMbn+EavIG3xPfw6xXv0osDnrKNrBJ6UwfeQOtXao2NAc2bX RjfpGy0OL6B4YdVmYjnYMBU1nvVB1GgbTr2RPrAYu+yyF2WI71/pvvRcJU9bOvLXwxN4 ZUb30V0J9VRRL8AGSfpdqpFJMcO5EtNDcqag99b8KCZmNXU0nmd4o35+jx7KSVpNpM7o WMpMu7Qipnkp3QUkLGwe2uObodJgHnxOsN+W0D1qOFGF1chG0A3jQYjUdfrpLj55c4KK h9IQ== X-Gm-Message-State: APjAAAWnR058vkn7HrHI8gpBC7XWQbEowidauhOCIJr/KK2WRBDImAAf nS9co3dPgi1tCbYNkt+B0nJZoamlAom8Xr7f0YGg5ZdV/Kvh X-Google-Smtp-Source: APXvYqwnWehfXVv+cTgMbmC8JDtGgeKanwz/g7rHrVO82/VKU6rQkcOihO2EYpiU+OJoGnyjFk/K9Z7NbCjOUvfNijzTrmNmUP5+ MIME-Version: 1.0 X-Received: by 2002:a05:6638:5:: with SMTP id z5mr1098412jao.58.1565049541088; Mon, 05 Aug 2019 16:59:01 -0700 (PDT) Date: Mon, 05 Aug 2019 16:59:01 -0700 In-Reply-To: <000000000000d0df7f058f625d13@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f3dd5b058f677d84@google.com> Subject: Re: WARNING: refcount bug in blk_mq_free_request (2) From: syzbot To: axboe@kernel.dk, hch@lst.de, keith.busch@intel.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org syzbot has bisected this bug to: commit 12f5b93145450c750f315657ef239a314811aeeb Author: Keith Busch Date: Tue May 29 13:52:28 2018 +0000 blk-mq: Remove generation seqeunce bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1263808c600000 start commit: e21a712a Linux 5.3-rc3 git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=1163808c600000 console output: https://syzkaller.appspot.com/x/log.txt?x=1663808c600000 kernel config: https://syzkaller.appspot.com/x/.config?x=a4c9e9f08e9e8960 dashboard link: https://syzkaller.appspot.com/bug?extid=f4316dab9d4518b755eb syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117a1906600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11aa11aa600000 Reported-by: syzbot+f4316dab9d4518b755eb@syzkaller.appspotmail.com Fixes: 12f5b9314545 ("blk-mq: Remove generation seqeunce") For information about bisection process see: https://goo.gl/tpsmEJ#bisection