linux-kernel - Re: [PATCH v2 0/5] io_uring: Fix async workqueue is not canceled on some corner case

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Message-ID: <CAMZfGtUFacR9GFfmySEN6EfdxVi7ZKdwTs17HrJmOL9A38J8sg@mail.gmail.com>
Date:   Mon, 28 Sep 2020 20:50:44 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     axboe@...nel.dk, viro@...iv.linux.org.uk
Cc:     linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Yinyin Zhu <zhuyinyin@...edance.com>
Subject: Re: [PATCH v2 0/5] io_uring: Fix async workqueue is not canceled on
 some corner case

Ping guys. This is worth fixing.

On Wed, Sep 23, 2020 at 7:44 PM Muchun Song <songmuchun@...edance.com> wrote:
>
> We should make sure that async workqueue is canceled on exit, but on
> some corner case, we found that the async workqueue is not canceled
> on exit in the linux-5.4. So we started an in-depth investigation.
> Fortunately, we finally found the problem. The commit:
>
>   1c4404efcf2c ("io_uring: make sure async workqueue is canceled on exit")
>
> did not completely solve this problem. This patch series to solve this
> problem completely. And there's no upstream variant of this commit, so
> this patch series is just fix the linux-5.4.y stable branch.
>
> changelog in v2:
>   1. Fix missing save the current thread files
>   2. Fix double list add in io_queue_async_work()
>
> Muchun Song (4):
>   io_uring: Fix missing smp_mb() in io_cancel_async_work()
>   io_uring: Fix remove irrelevant req from the task_list
>   io_uring: Fix missing save the current thread files
>   io_uring: Fix double list add in io_queue_async_work()
>
> Yinyin Zhu (1):
>   io_uring: Fix resource leaking when kill the process
>
>  fs/io_uring.c | 59 +++++++++++++++++++++++++++++++++++++++--------------------
>  1 file changed, 39 insertions(+), 20 deletions(-)
>
> --
> 2.11.0
>


-- 
Yours,
Muchun