Re: [PATCH v2 1/2] drm: Add GPU reset sysfs event

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On Tuesday, March 15th, 2022 at 08:13, Dave Airlie <airlied@xxxxxxxxx> wrote:

> Just one thing comes to mind reading this, racy PID reuse.
>
> process 1234 does something bad to GPU.
> process 1234 dies in parallel to sysfs notification being sent.
> other process 1234 reuses the pid
> new process 1234 gets destroyed by receiver of sysfs notification.

This is a more general problem with PIDs. One solution is pidfd.




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