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 50032C433F5 for ; Mon, 1 Nov 2021 18:30:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32BE360F45 for ; Mon, 1 Nov 2021 18:30:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231822AbhKAScr (ORCPT ); Mon, 1 Nov 2021 14:32:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229610AbhKAScq (ORCPT ); Mon, 1 Nov 2021 14:32:46 -0400 Received: from mail-il1-x12b.google.com (mail-il1-x12b.google.com [IPv6:2607:f8b0:4864:20::12b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CC5CC061714 for ; Mon, 1 Nov 2021 11:30:12 -0700 (PDT) Received: by mail-il1-x12b.google.com with SMTP id j28so13017809ila.1 for ; Mon, 01 Nov 2021 11:30:12 -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=/OdvGRGPu0zDVBrtV3KLjsx6ZoiLAgQ4dU32aGnds/Q=; b=pQAxahXBIfbwdOIYt/l59ZH82L0ST1pPCyL09hl00FzeH/EiHYLnoWeUmTP7+u+9OP FmyXJCT40tP63vQ1vKYAseaud6pMZGfj6IhEqZhDQdiSn2mTecmq1MN226dOtFFaGBJf kgOu/BNs/2dZanENMcs/KAcUgKmDj9lysRcqikWdoRufMgQ4mZgOcyapwC6B9vtrZzVu 1r0LuTsis5xSTORf7z9vd0tcaOKW4BiiO+4rXrQsepRivuCgyVB/njT88xfNtYm0YdwT AC0YoApL2W7X84spkh/R30RrR8oXYgq/8MjnBbN/vakcuSQG6caY/vI51wBH8Qh9Ra0s CYRQ== 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=/OdvGRGPu0zDVBrtV3KLjsx6ZoiLAgQ4dU32aGnds/Q=; b=RdVkWPqYrYa3ey4xHyC3+ZDrvJOCRK6Ni4y8e/hwuMtLKT1qjs8YgY2L6JJP3mnlWX Znee8rhu8bdyRmmdP/vTzucCEZJGzNYbgV2Z9PJjdFDCNtC3S+bPmAdZ+2022HoAbjqk ky3IMplfAHTa+OkdBg63DnBvYn0vPYXp5Qml9hg37IjTjkDI0177Nf151L1GWStpuY+Y 7VhRh8VCv80wJqBuCJ0bkQQ35QU1reVik9RXAgZlsIrNtn3iuxSsF2kAX1VBLKGzJQsg mHZz1XrgFQPr5fSz2hY4TlsRxWJY2fELxnxGPUBPGKUCfLUQgTD33C7RX3Vc7798tqZR sYlw== X-Gm-Message-State: AOAM532M+ws4XI1iMhoyr44vyJxe5Twbpel7oDs8ag1mT4QqA6rgX9/4 SNbRfbOzFRpYvA+S7fWkcHnl3Hvy/xxUzA== X-Google-Smtp-Source: ABdhPJzm/F7/ygI9I4QcM9qe4P/bULdDiNQ8WQzJYyeUU3GutDtK1TvphmEsYcNN2yF2kXMKJxjQdA== X-Received: by 2002:a05:6e02:2143:: with SMTP id d3mr4228107ilv.241.1635791411720; Mon, 01 Nov 2021 11:30:11 -0700 (PDT) Received: from [192.168.1.30] ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id s3sm5657737ilv.61.2021.11.01.11.30.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Nov 2021 11:30:11 -0700 (PDT) Subject: Re: [syzbot] WARNING in io_poll_task_func To: syzbot , asml.silence@gmail.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiaoguang.wang@linux.alibaba.com References: <000000000000e8ad6005cfbe4960@google.com> From: Jens Axboe Message-ID: Date: Mon, 1 Nov 2021 12:30:10 -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: <000000000000e8ad6005cfbe4960@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 11/1/21 12:24 PM, 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=142531f4b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4b504bcb4c507265 > dashboard link: https://syzkaller.appspot.com/bug?extid=50a186b2a3a0139929ab > 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=177a979ab00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1636cc5f300000 > > 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 #syz invalid Please stop testing this old branch, as mentioned the patches causing this have been dropped. -- Jens Axboe