Re: use-after-free" with v5.10.y caused by backport of a298232ee6b9 ("io_uring: fix link timeout refs")

On Mon, Jul 26, 2021 at 11:57:22AM +0100, Pavel Begunkov wrote:

On 7/26/21 11:29 AM, Sudip Mukherjee wrote:

...

Hi Pavel,

We had been running syzkaller on v5.10.y and a "use after free" is being reported for v5.10.43+ kernels.

"... # 5.12+", weird, but perhaps due to dependencies. Thanks for letting know.

Greg, Sasha, should be same as reported for 5.12

https://www.spinics.net/lists/stable/msg485116.html

Can you try to apply it to 5.10 or should I resend?

I just tried applying those patches and they did not work. So can you provide some new backports?

thanks,

greg k-h