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

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Message-ID: <d350afac-eef2-c33f-e435-fe0ec7ffd1cf@gmail.com>
Date:   Fri, 30 Apr 2021 19:34:22 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Palash Oswal <oswalpalash@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        syzbot+11bf59db879676f59e52@...kaller.appspotmail.com
Subject: Re: INFO: task hung in io_uring_cancel_sqpoll

On 4/30/21 4:02 PM, Palash Oswal wrote:
> On Fri, Apr 30, 2021 at 8:03 PM Pavel Begunkov <asml.silence@...il.com> 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...@...il.com ax...@...nel.dk io-u...@...r.kernel.org linux-...@...r.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?

#syz test: git://git.kernel.dk/linux-block io_uring-5.13

-- 
Pavel Begunkov