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

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Date:   Fri, 30 Apr 2021 20:32:22 +0530
From:   Palash Oswal <oswalpalash@...il.com>
To:     Pavel Begunkov <asml.silence@...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 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.


Palash