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=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 F211BC433DB for ; Fri, 5 Mar 2021 14:11:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA06D6501A for ; Fri, 5 Mar 2021 14:11:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231164AbhCEOLZ (ORCPT ); Fri, 5 Mar 2021 09:11:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231157AbhCEOLT (ORCPT ); Fri, 5 Mar 2021 09:11:19 -0500 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 54674C061574 for ; Fri, 5 Mar 2021 06:11:19 -0800 (PST) Received: by mail-il1-x129.google.com with SMTP id z9so2115020iln.1 for ; Fri, 05 Mar 2021 06:11:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:subject:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=l6IgK3ij/YjTNmmcEwyfRQ1upb35j4vL73l5Wo3XyTo=; b=air1o57k6XY5FgslA8r0maE5x9dm7J/LFHlDA1WEJRvWIoZqZJ3fWHOJQcW0Eo8WEU 5/HqZ84JS+9Jg1VC8cpLVcwC/VLhBFYDK26CJKbmcDHyNoATnAGJYWGY64MWDMB0oLh0 C+/wgD2MUZTqtJsr0dPKwWmVoIkEknbTGHQg3elNISKUZ61nlxNZZL5bFVI8Wyopkw/w U5AAD+G4kLtLnKHd9fxnCNh8ZoS4Bo4y9Hz8LoUsjj0wpzo8b5U+V5iSwQwsX1Ty1tEn sSB5WQOhjPvlEBGHL+68Yuj2UTTwUFFSW483k92G/Zl1oTVHrtz/oau5JEeTiz+lJU+a wmEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=l6IgK3ij/YjTNmmcEwyfRQ1upb35j4vL73l5Wo3XyTo=; b=HbuTtuv2zkUxAyTi04dRbz3Jsvc13NS63IujBWolrflDokPXEmmdxrq+H/cy+suSbA 9SUTgFJLtk47pbvXRBRw+zhNCyBTmlq9zt5gwfU+FOT0Vy4oC1QydJHMo7NSvollvR59 GU4C5v2mP80z4EstTCoWBTdexruqFxLbBQJAJfPa33eYafP8sNzeT19DTNbQ3uPq3LRs xDvAeJvGj1y8Ed5GYAFwfNp/Vl1S9dnOxXpF5EXyDsj22Ke6ZAlk9/wSFyxuVy3krtXW 2GSvBfaDNdHdewNehqma7WAza1nts1zEiTsFBkgVA0fvaupLqWZnu45paIN1EZQocZRJ BV1g== X-Gm-Message-State: AOAM533f0qNl7h5/0Ll/ZAK1pHAEbvS7Nx/cUxlR/UcAlTteELAbBvIt EIFRqCuEj47ZFzJvtgqreNhOvw== X-Google-Smtp-Source: ABdhPJx1jHAyAAVkrSYkKfQUk8fYUr60wo0yZNlweVSgSYTVLm0o+aREwH8rNuFbNkSYkmy7E8ApRQ== X-Received: by 2002:a92:b003:: with SMTP id x3mr9569044ilh.15.1614953478153; Fri, 05 Mar 2021 06:11:18 -0800 (PST) Received: from [192.168.1.30] ([65.144.74.34]) by smtp.gmail.com with ESMTPSA id u14sm1363894ilv.0.2021.03.05.06.11.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Mar 2021 06:11:17 -0800 (PST) From: Jens Axboe Subject: Re: BUG: soft lockup in corrupted To: Palash Oswal Cc: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, Hillf Danton , Pavel Begunkov , syzkaller-bugs@googlegroups.com References: Message-ID: Date: Fri, 5 Mar 2021 07:11:16 -0700 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: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Mar 4, 2021, at 10:06 PM, Palash Oswal wrote: > > Hello, > > I was running syzkaller and I found the following issue : > Head Commit : 27e543cca13fab05689b2d0d61d200a83cfb00b6 ( v5.11.2 ) > Git Tree : stable > > Console logs: > watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor497:423] > Modules linked in: > CPU: 0 PID: 423 Comm: syz-executor497 Not tainted 5.11.2 #13 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1 04/01/2014 > RIP: 0010:__io_cqring_events fs/io_uring.c:1732 [inline] > RIP: 0010:io_cqring_events fs/io_uring.c:2399 [inline] > RIP: 0010:io_should_wake fs/io_uring.c:7190 [inline] > RIP: 0010:io_cqring_wait fs/io_uring.c:7283 [inline] > RIP: 0010:__do_sys_io_uring_enter+0x6b9/0x1040 fs/io_uring.c:9389 > Code: 00 00 e8 ea 9a cd ff 31 ff 44 89 e6 e8 30 9d cd ff 45 85 e4 0f > 85 5c 08 00 00 e8 d2 9a cd ff 48 8b 5d c0 48 8b 83 c0 00 00 00 <8b> 88 > 80 00 00 00 8b 83 00 02 00 00 29 c8 8b 4d c8 89 c7 89 85 78 > watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor497:416] > RSP: 0018:ffffc900001efe58 EFLAGS: 00000293 https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.12&id=701b8b187525e3b90cbcab4dbc073f42dbcc4059 —  Jens Axboe