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 B57C4CA9EAF for ; Sun, 27 Oct 2019 06:33:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 914E2205C9 for ; Sun, 27 Oct 2019 06:33:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726079AbfJ0GdB (ORCPT ); Sun, 27 Oct 2019 02:33:01 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:36919 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725838AbfJ0GdB (ORCPT ); Sun, 27 Oct 2019 02:33:01 -0400 Received: by mail-io1-f71.google.com with SMTP id 18so5687008ioo.4 for ; Sat, 26 Oct 2019 23:33:01 -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=lGwoFEs6atbJNjfwbsMMgVdENVRKdZeDwx59pl7Gnc0=; b=bEHKxe5rTuSr8jw4znbe1zmYWIJzrch0i517iVhVc6GzEtqBUrLwAwDML6BJxfZGN0 EB2T/giYU1baa1mj+S6mZc+Y8hFkSnXFgvo2c4Ay8WU2I6J4DBlN6ZK/TAKlsDo/IFqC 5ujjytvCbgSeTsy5CUp50+EMfYRRXgFAcv0Q+xD++57vM8NcF/78mYTCOA9zHrJzShnh haMyks9Fg7hx/GMX7lxHJKHsyBggkvmIFgCOOPOqQUi7CWInMmckC7cK6HrLNl3QUS9v az12mIpeXDRuhNYl2cjPl0cms4JgBK0VWoEbsQoXqswu2wfRm6hTGKHR/30y9AR+gm2t FWAw== X-Gm-Message-State: APjAAAV+dkiPL7FTQKt74E2/bdOSrwMgLpcB4QjZEAHnWsV3qjwQzBgn tLcY+QRnEZCPbOTtoScDGsv+fMM5JuYfy1gG5UUA6NT3RxBY X-Google-Smtp-Source: APXvYqybyCpDlrzzUeGRwdrxvaNZyICTlgNIiEO6W6PPjlDKJOGQERHCbQp+yT2DLtml2AKv0s7y2mTm9ga/zJuCHcqdxwm21NZZ MIME-Version: 1.0 X-Received: by 2002:a6b:5503:: with SMTP id j3mr12197785iob.151.1572157980811; Sat, 26 Oct 2019 23:33:00 -0700 (PDT) Date: Sat, 26 Oct 2019 23:33:00 -0700 In-Reply-To: <000000000000fbbe1e0595bac322@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fa2e630595de8d05@google.com> Subject: Re: KASAN: null-ptr-deref Write in io_wq_cancel_all From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, dan.j.williams@intel.com, dhowells@redhat.com, dvyukov@google.com, gregkh@linuxfoundation.org, hannes@cmpxchg.org, joel@joelfernandes.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab+samsung@kernel.org, mingo@redhat.com, patrick.bellasi@arm.com, rgb@redhat.com, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, yamada.masahiro@socionext.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 d5f773aba1186142d52aef8242a426310a39fa86 Author: Jens Axboe Date: Thu Oct 24 13:25:42 2019 +0000 io_uring: replace workqueue usage with io-wq bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=142c6d18e00000 start commit: 139c2d13 Add linux-next specific files for 20191025 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=162c6d18e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=122c6d18e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=28fd7a693df38d29 dashboard link: https://syzkaller.appspot.com/bug?extid=d958a65633ea70280b23 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=160573c0e00000 Reported-by: syzbot+d958a65633ea70280b23@syzkaller.appspotmail.com Fixes: d5f773aba118 ("io_uring: replace workqueue usage with io-wq") For information about bisection process see: https://goo.gl/tpsmEJ#bisection