Re: [PATCH 0/3] io_uring: Fix async workqueue is not canceled on some corner case

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Sep 15, 2020 at 04:15:48PM +0800, Muchun Song 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.
> 
> Muchun Song (2):
>   io_uring: Fix missing smp_mb() in io_cancel_async_work()
>   io_uring: Fix remove irrelevant req from the task_list
> 
> Yinyin Zhu (1):
>   io_uring: Fix resource leaking when kill the process
> 
>  fs/io_uring.c | 45 +++++++++++++++++++++++++++++----------------
>  1 file changed, 29 insertions(+), 16 deletions(-)
> 
> -- 
> 2.11.0
> 


<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>