linux-kernel - Re: WARNING in io_wq_submit

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Date:   Wed, 8 Sep 2021 20:59:16 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Hao Sun <sunhao.th@...il.com>, Jens Axboe <axboe@...nel.dk>,
        Pavel Begunkov <asml.silence@...il.co>,
        io-uring@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: WARNING in io_wq_submit_work

On 9/8/21 7:46 AM, Hao Sun wrote:
> Hello,
> 
> When using Healer to fuzz the latest Linux kernel, the following crash
> was triggered.
> 
> HEAD commit: 4b93c544e90e-thunderbolt: test: split up test cases
> git tree: upstream
> console output:
> https://drive.google.com/file/d/1RZfBThifWgo2CiwPTeNzYG4P0gkZlINT/view?usp=sharing
> kernel config: https://drive.google.com/file/d/1c0u2EeRDhRO-ZCxr9MP2VvAtJd6kfg-p/view?usp=sharing
> C reproducer: https://drive.google.com/file/d/18LXBclar1FlOngPkayjq8k-vKcw-SR98/view?usp=sharing
> Syzlang reproducer:
> https://drive.google.com/file/d/1rUgX8kHPhxiYHIbuhZnDZknDe1DzDmhd/view?usp=sharing
> Similar report:
> https://groups.google.com/u/1/g/syzkaller-bugs/c/siEpifWtNAw/m/IkUK1DmOCgAJ
> 
> If you fix this issue, please add the following tag to the commit:
> Reported-by: Hao Sun <sunhao.th@...il.com>

Reproduced and fixed. "WARNING in io_req_complete_post" should
be the same problem, doesn't fail with the fix. Thanks!

https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.15&id=713b9825a4c47897f66ad69409581e7734a8728e

-- 
Pavel Begunkov