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=-9.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_NONE,USER_AGENT_SANE_1 autolearn=ham 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 D77B6C433ED for ; Fri, 30 Apr 2021 21:05:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B09FA613C8 for ; Fri, 30 Apr 2021 21:05:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236065AbhD3VFy (ORCPT ); Fri, 30 Apr 2021 17:05:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236019AbhD3VFy (ORCPT ); Fri, 30 Apr 2021 17:05:54 -0400 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EAC3C06138B; Fri, 30 Apr 2021 14:05:05 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id d11so14158010wrw.8; Fri, 30 Apr 2021 14:05:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=4AFQFdYIK2aHm1d5xFyje/tGT6Iuc52lwDSkAKiwQ+0=; b=T7Clnp0nW+dl1zkqChEKs3pKarwzuucCmhLXTyDQDkSQgn823ebNRcK6CGXdLrueJh 2JSQqctkyVfO32WId5f4qMJULZC8/UwNz4ZHeE0dlh/I1vTUYYtQbKWStcK88wWva0oK O6+sqUwigxN7zrsJXATlgGi6sArWmbI5SBTglVCtTzoRXrVi5UgsV2DV/7EnnbkM9goQ t7p+qNNVixGc4b8WD8tMng7x+Mv8h3vouwpEUj+hHG3Ci1Zf/ApDHQzx3E991D9+9k5T lypYVkn7+Cw7wRYHo65pGSnJbMgGG2nS9DwXorZqXBGuYH3jO6xUfi6e0c9jtSndf6J0 l7OA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=4AFQFdYIK2aHm1d5xFyje/tGT6Iuc52lwDSkAKiwQ+0=; b=SP2XN6kCHXpAFUbzV7KK2j+PUy58pT7l8UMSB/yPFRdXWm3FbyPuCpX+yTVye7m50N VF4UsK9bTnES9Nya1RircZFQCe85p3Yqz4zwNBOZUujEBnQbIFebC0y76aWCMrqd82N4 xebATBpVCpil5UkdYIksMO0k4w3THUkOvxF9StuZacmZnsLUZ5VX/+zWeOnIJ+X9w5fO oiaXfpKZZmUMbgrYyhOFd2qT51dQ9/uF2jdARO+nmU0FTjKG5jTR0FSzrIt3ChPDuIRU Vplk9DkBa8PgxOaN8W3Tykd/iAHYBMrKwXBRe+nDMw4QsgK56aoT+L3M56ZftjoYPhTF r3mw== X-Gm-Message-State: AOAM531trenLUjncXYDT47lFLBlwrkd6O815NX994x8RDUXNifJaMm6G 3uyTpMhNyH8lJBwR1JaNOYo= X-Google-Smtp-Source: ABdhPJwAjh2UP9hVb62pJ4UiJuGK/XfSrZhDaWcnN/VAqrY5Tx8p4w1UhRTw2xZmFmHfI8xCwvqcJw== X-Received: by 2002:adf:d091:: with SMTP id y17mr9356684wrh.107.1619816704466; Fri, 30 Apr 2021 14:05:04 -0700 (PDT) Received: from [192.168.8.197] ([148.252.132.80]) by smtp.gmail.com with ESMTPSA id h5sm14025866wmq.23.2021.04.30.14.05.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 30 Apr 2021 14:05:03 -0700 (PDT) Subject: Re: INFO: task hung in io_uring_cancel_sqpoll From: Pavel Begunkov To: Palash Oswal Cc: Jens Axboe , io-uring@vger.kernel.org, LKML , syzbot+11bf59db879676f59e52@syzkaller.appspotmail.com References: <0000000000000c97e505bdd1d60e@google.com> <53a22ab4-7a2d-4ebd-802d-9d1b4ce4e087n@googlegroups.com> Message-ID: <9a7c2040-e26f-1c59-b7e9-25784d5b854e@gmail.com> Date: Fri, 30 Apr 2021 22:04:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: 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 4/30/21 7:34 PM, Pavel Begunkov wrote: > On 4/30/21 4:02 PM, Palash Oswal wrote: >> On Fri, Apr 30, 2021 at 8:03 PM Pavel Begunkov wrote: >>> >>> On 4/30/21 3:21 PM, Palash Oswal wrote: >>>> On Thursday, March 18, 2021 at 9:40:21 PM UTC+5:30 syzbot wrote: >>>>> >>>>> Hello, >>>>> >>>>> syzbot found the following issue on: >>>>> >>>>> HEAD commit: 0d7588ab riscv: process: Fix no prototype for arch_dup_tas.. >>>>> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes >>>>> console output: https://syzkaller.appspot.com/x/log.txt?x=12dde5aed00000 >>>>> kernel config: https://syzkaller.appspot.com/x/.config?x=81c0b708b31626cc >>>>> dashboard link: https://syzkaller.appspot.com/bug?extid=11bf59db879676f59e52 >>>>> userspace arch: riscv64 >>>>> CC: [asml.s...@gmail.com ax...@kernel.dk io-u...@vger.kernel.org linux-...@vger.kernel.org] >>>>> >>>>> Unfortunately, I don't have any reproducer for this issue yet. >>> >>> There was so many fixes in 5.12 after this revision, including sqpoll >>> cancellation related... Can you try something more up-to-date? Like >>> released 5.12 or for-next >>> >> >> The reproducer works for 5.12. >> >> I tested against the HEAD b1ef997bec4d5cf251bfb5e47f7b04afa49bcdfe >> commit on for-next tree >> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/?h=for-next >> and the reproducer fails. > > Can't reproduce. Does it hang as in the original's report dmesg? > Can you paste logs? and `uname -r` if you could > > #syz test: git://git.kernel.dk/linux-block io_uring-5.13 > -- Pavel Begunkov