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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5B89C433EF for ; Sun, 31 Oct 2021 19:41:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0C7C60F46 for ; Sun, 31 Oct 2021 19:41:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231228AbhJaTnj (ORCPT ); Sun, 31 Oct 2021 15:43:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231224AbhJaTnj (ORCPT ); Sun, 31 Oct 2021 15:43:39 -0400 Received: from mail-il1-x129.google.com (mail-il1-x129.google.com [IPv6:2607:f8b0:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19638C061764 for ; Sun, 31 Oct 2021 12:41:07 -0700 (PDT) Received: by mail-il1-x129.google.com with SMTP id j28so10002564ila.1 for ; Sun, 31 Oct 2021 12:41:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=tUREh5LHd66l0OLGq8t2Df8ogS/efOJa+e+gKKpOSzs=; b=YVQ8ATqPbzx3r236TDe5h8S8/hbELrCy0eejyBnDtPxDG8pKzxSXlyfVsk7CNTk3mJ VzpqzghhPrqlUJK/ejvnrVg4vjmRJ5PWCNyzEfwYSsf/Lk2ALHnm0W3L4H4kWBX+2VpK 3CIid+BM4MG7vmLpMWg98z856wq3Yxx4OVXB9hLqRaGxCdgzW2U/qjmEBP/d4CGZpAWt Kjght+EK+YImwpSgO85XX2pU4jwbrOg9kM2ytWfD7frmDoIXGebpJ2ukWzYSA2MoUSur LNkjiIJxQnFfbzuun5Q0oc1JMDVXXNczcAxkozgFwgt4vBEa5mJYv977JwCk++kMN5bX mHjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=tUREh5LHd66l0OLGq8t2Df8ogS/efOJa+e+gKKpOSzs=; b=8JZ+1GZ2hzqU01Jj3JUYS+kGl64udbl91haCkbtXG9LZTR634lQQPfOkEgZyLWhHuF dny0g9zgLVC2VtcbXH6QBaq7nRbvliMUCyVeJvLpTmo/9fg6LRcqVB42CQypzrt+rDgc 23pQLoJL9eSTgGI72CzMt4zRzXJ2mgb1ho1celd4YLFaEwBwdQTatvPffszX9PIRKqDd GnwzpeAhjCOTkMEm5qNQ8wXNa5Nj/Di/dCbBNSRkum+InkaOm+4+GieSxFOkfAJlwwQl QWYIPlXOS4pH87iEY6w7aiv00ZWFXRq7p4qFR/3hMQvsVGKFF4Tb/nN9pZnB2ASp7+AZ Sv4Q== X-Gm-Message-State: AOAM530Na6dRyN+d/xLtbug0Ab0DIOFQA+ttKZSbDhc5oln8oj8AAvfv D+Jw/covdrjCYbnhJgu8jikF1A== X-Google-Smtp-Source: ABdhPJy7kO9AYFBRAJ1fgLQ4Fc5NqLK2w2cnUbQ5IfYE3VUCGF/k9+9Fv/6TW82wDVqy4Erqr9Sx9Q== X-Received: by 2002:a05:6e02:1c8a:: with SMTP id w10mr17322578ill.193.1635709266435; Sun, 31 Oct 2021 12:41:06 -0700 (PDT) Received: from [192.168.1.116] ([66.219.217.159]) by smtp.gmail.com with ESMTPSA id a20sm6906987ila.22.2021.10.31.12.41.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 31 Oct 2021 12:41:06 -0700 (PDT) Subject: Re: [syzbot] WARNING: ODEBUG bug in __put_task_struct To: syzbot , akpm@linux-foundation.org, andrii@kernel.org, asml.silence@gmail.com, ast@kernel.org, bpf@vger.kernel.org, christian@brauner.io, daniel@iogearbox.net, david@redhat.com, ebiederm@xmission.com, io-uring@vger.kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, npiggin@gmail.com, peterz@infradead.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, xiaoguang.wang@linux.alibaba.com, yhs@fb.com References: <000000000000bb843a05cfa99111@google.com> From: Jens Axboe Message-ID: Date: Sun, 31 Oct 2021 13:41:04 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <000000000000bb843a05cfa99111@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 10/31/21 11:41 AM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: bdcc9f6a5682 Add linux-next specific files for 20211029 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1413226ab00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cea91ee10b0cd274 > dashboard link: https://syzkaller.appspot.com/bug?extid=30a60157d4ef222fd5e2 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121ba3e2b00000 > > The issue was bisected to: > > commit 34ced75ca1f63fac6148497971212583aa0f7a87 > Author: Xiaoguang Wang > Date: Mon Oct 25 05:38:48 2021 +0000 > > io_uring: reduce frequent add_wait_queue() overhead for multi-shot poll request This was dropped from the tree last week: #syz invalid -- Jens Axboe