linux-kernel - Re: INFO: task hung in io_uring_cancel

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Message-ID: <e5ac817b-bc96-bea6-aadb-89d3c201446d@gmail.com>
Date:   Tue, 7 Sep 2021 22:31:23 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, Hao Sun <sunhao.th@...il.com>,
        io-uring@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: INFO: task hung in io_uring_cancel_generic

On 9/7/21 8:30 PM, Jens Axboe wrote:
> On 9/7/21 5:50 AM, Hao Sun wrote:
>> Hello,
>>
>> When using Healer to fuzz the latest Linux kernel, the following crash
>> was triggered.
>>
>> HEAD commit: 7d2a07b76933 Linux 5.14
>> git tree: upstream
>> console output:
>> https://drive.google.com/file/d/1c8uRooM0TwJiTIwEviOCB4RC-hhOgGHR/view?usp=sharing
>> kernel config: https://drive.google.com/file/d/1XD9WYDViQLSXN7RGwH8AGGDvP9JvOghx/view?usp=sharing
>> Similar report:
>> https://groups.google.com/u/1/g/syzkaller-bugs/c/FvdcTiJIGtY/m/PcXkoenUAAAJ
>>
>> Sorry, I don't have a reproducer for this crash, hope the symbolized
>> report can help.
>> If you fix this issue, please add the following tag to the commit:
>> Reported-by: Hao Sun <sunhao.th@...il.com>
> 
> Would be great with a reproducer for this one, though...

And syzbot usually sends an execution log with all syz programs
it run, which may be helpful. Any chance you have anything similar
left?

-- 
Pavel Begunkov