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[23.128.96.18]) by mx.google.com with ESMTP id g20si1047999eje.577.2020.11.11.03.25.34; Wed, 11 Nov 2020 03:25:58 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=i2WztfGY; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726352AbgKKLWB (ORCPT + 99 others); Wed, 11 Nov 2020 06:22:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726264AbgKKLV4 (ORCPT ); Wed, 11 Nov 2020 06:21:56 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EAC11C0613D6 for ; Wed, 11 Nov 2020 03:21:55 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id j31so981146qtb.8 for ; Wed, 11 Nov 2020 03:21:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=9GUAQtUoQBJhLZ2XitoYjqnMMxULsnKpkMbmeOjjv3M=; b=i2WztfGYNRVXSzvxNnLtoJr/4Y18F0RCxz3C2eRGM4x6rhFWD72gNezK491S3oTvZr bxSKgD8twhKNJgFXAjQhP7GQJCZyj45tUrtuCfzjZlkkUszfnUjIln+yJZq7ZRls8cWZ pk9/O7Z7RiwhDLpnqZ0M6vvSnTD9V9wtih6sZetU9yVGW9TlL3ObMR55SXPGgBbwcCpf SSQ+G62B+3GhNRnCOfNt+QCD4K5MX8lsRIhtisfWG6JHTx78hyakgdz2JeSTnU+DKKf1 4ycpQPo0vlwJT7R4H8zgZyh769jlBxlGUvyY9s48vjFVL0zq2lojKyTaoIhfwhLA0OiR U9CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=9GUAQtUoQBJhLZ2XitoYjqnMMxULsnKpkMbmeOjjv3M=; b=h4YdnrCe0Ftr4bF20oP3pvXgDAz8GSfUWaTq2BrN+iep+hP2TX22cXH4bASz65zl5b wXfKfytVt64ys9UG6lTqgMYEhs4XepjWOgycIWtPSXscXBtOYie4Pr8XemMicya4XSa7 eCQSIklDFbKrzgNoNTDxweyFx3E6+I0NMy5dcHGjQm514VOziFzOaqUL3YJcH+1/dz5e iw09A/MO6WGUXO0LdVQERfQS/66ZSC1KnwEzrhhIaW//dPivjPsLtzZpNrVya0M0zwT8 XSCIY5XBcl5vj1Mjbm0Zp8t1Svj06zEKOTmoo70jKJywELXidchzTcIWzWat7htbueqk WAAg== X-Gm-Message-State: AOAM530+mfxYzFhv098GROoi+1+yAJJVHKvVe0wyHxmxfOF1gze9BnFw sLy0Q36MVQJIMHaaui84oBoJa28lyJdeBDs2QwhSdQ== X-Received: by 2002:aed:2b47:: with SMTP id p65mr21554232qtd.337.1605093714929; Wed, 11 Nov 2020 03:21:54 -0800 (PST) MIME-Version: 1.0 References: <000000000000391eaf05ac87b74d@google.com> <00000000000004632a05af787ebf@google.com> In-Reply-To: <00000000000004632a05af787ebf@google.com> From: Dmitry Vyukov Date: Wed, 11 Nov 2020 12:21:43 +0100 Message-ID: Subject: Re: INFO: task hung in io_uring_flush To: syzbot Cc: Pavel Begunkov , Jens Axboe , io-uring@vger.kernel.org, linux-fsdevel , LKML , syzkaller-bugs , Al Viro Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 17, 2020 at 3:42 AM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit b7ddce3cbf010edbfac6c6d8cc708560a7bcd7a4 > Author: Pavel Begunkov > Date: Sat Sep 5 21:45:14 2020 +0000 > > io_uring: fix cancel of deferred reqs with ->files > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=173d9b0d900000 > start commit: 9123e3a7 Linux 5.9-rc1 > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652 > dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1573f116900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144d3072900000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: io_uring: fix cancel of deferred reqs with ->files > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz fix: io_uring: fix cancel of deferred reqs with ->files