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

[Muchun Song <songmuchun@bytedance.com>]

Ping guys. This is worth fixing.

On Wed, Sep 23, 2020 at 7:44 PM Muchun Song <songmuchun@bytedance.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