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;
MIME-Version: 1.0
References: <0000000000000c97e505bdd1d60e@google.com> <cfa0f9b8-91ec-4772-a6c2-c5206f32373fn@googlegroups.com>
 <53a22ab4-7a2d-4ebd-802d-9d1b4ce4e087n@googlegroups.com> <CAGyP=7fpNBhbmczjDq-vpzbSDyqwCw2jS7xQo4XO=bxwsy2ddQ@mail.gmail.com>
 <a6ce21f4-04e7-f34c-8cfc-f8158f7fe163@gmail.com>
In-Reply-To: <a6ce21f4-04e7-f34c-8cfc-f8158f7fe163@gmail.com>
From:   Palash Oswal <oswalpalash@gmail.com>
Date:   Fri, 30 Apr 2021 20:32:22 +0530
Message-ID: <CAGyP=7czG1nmzpM5T784iBdApVL14hGoAfw-nhS=tNH5t9C79g@mail.gmail.com>
Subject: Re: INFO: task hung in io_uring_cancel_sqpoll
To:     Pavel Begunkov <asml.silence@gmail.com>
Cc:     Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        syzbot+11bf59db879676f59e52@syzkaller.appspotmail.com
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Fri, Apr 30, 2021 at 8:03 PM Pavel Begunkov <asml.silence@gmail.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...@gmail.com ax...@kernel.dk io-u...@vger.kernel.org linux-...@vger.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