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=-10.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 B0D5CC433E0 for ; Tue, 9 Mar 2021 14:58:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6685B65244 for ; Tue, 9 Mar 2021 14:58:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231140AbhCIO57 (ORCPT ); Tue, 9 Mar 2021 09:57:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231636AbhCIO5p (ORCPT ); Tue, 9 Mar 2021 09:57:45 -0500 Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93A71C06175F for ; Tue, 9 Mar 2021 06:57:45 -0800 (PST) Received: by mail-io1-xd2c.google.com with SMTP id p16so14231910ioj.4 for ; Tue, 09 Mar 2021 06:57:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=K7+iO48PWOP9c51Z9qgh5xFNA9ow1h0cDCkNzxCzG0o=; b=NHs5vSl3YWLN821O6OO5C7BadTSOQw9OUgvViXPiNqrQelVGJhrsxbxc2UiRDWwyq8 ND07ZR7Fd5z1nnf2CCHhmcdDMLqIzZHrPIDZYA9Vc/8gtSMgL+HCAWWEen1ye6+CtVSx pDTiSaWGut2OggyVjvs1ETnDYoFUkE7YrTwl4JoJFRHhqoUHHgjoMbc+yr0f8m4aW2Ly L0r0wHt59dN3MhTdPrwlp890GHQhYtJBOXRH9RxHeUaFi6njLdoTTxQe0Y8tyiI3JEcj lX6ZUSnhfNWniqXpBeWp6yqcqrlkxoE20pQuXIIBuDQd2DlJbzozW5hoPUJT8/D7zoGt Tl6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; 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=K7+iO48PWOP9c51Z9qgh5xFNA9ow1h0cDCkNzxCzG0o=; b=mloPfMNEYGET4lyYI1mXigyWhNyKn+75FrrjUfwAyrfeo9wnhuftm7gI1BKy8xehbu sAi/XxImaNIIkCpzWYNm930QaLNPJm0ZeFluInkbtj+1MiyIvGgQjMl1BMw/Yne7DW8j qmhb7IbdhtQuOAE4tVzBmSgvCOH1WhZMipezwfu2xoAy5Uqct1H8GAmKeou8MEQIVsXS 4duLSTGjSgly6IKyP0diu3UrLTE8dxRW/YDYmp3Xn7yz3mwY0VLPlAYLGcoCJgyjFN3s Cnjnevzt129i4ilbxRa8Uj8TD2LVBu6TBlr24yGgQ3AEkgy9WtiDpBowoTfwVuxbM66C oqMg== X-Gm-Message-State: AOAM5334MYiCPsMS/vJUrPzYiZSj9S38GHD6vdkDDhaEFuQF9HooWmWq 2owURgkvasLtkPnZVRnEXfQIvA== X-Google-Smtp-Source: ABdhPJyAB+1dwZZI/BMn10m+Lu82RyrFzMdTZ9bbt1b6Nj7mBhJ4IH+XLO0GUwuQeuUA78hdQGsXOQ== X-Received: by 2002:a05:6638:1390:: with SMTP id w16mr29062380jad.83.1615301864809; Tue, 09 Mar 2021 06:57:44 -0800 (PST) Received: from [192.168.1.30] ([65.144.74.34]) by smtp.gmail.com with ESMTPSA id s8sm7496397ilv.76.2021.03.09.06.57.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Mar 2021 06:57:44 -0800 (PST) Subject: Re: [syzbot] possible deadlock in io_sq_thread_finish To: syzbot , asml.silence@gmail.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000b71e9605bd1b064f@google.com> From: Jens Axboe Message-ID: <5112d102-d849-c640-868f-ee820163d02e@kernel.dk> Date: Tue, 9 Mar 2021 07:57:43 -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: <000000000000b71e9605bd1b064f@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 3/9/21 7:04 AM, syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: 144c79ef Merge tag 'perf-tools-fixes-for-v5.12-2020-03-07'.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=129addbcd00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=db9c6adb4986f2f2 > dashboard link: https://syzkaller.appspot.com/bug?extid=ac39856cb1b332dbbdda > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167574dad00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12c8f566d00000 #syz test: git://git.kernel.dk/linux-block io_uring-5.12 -- Jens Axboe