Re: [PATCH v4 1/3] drm/sched: cache the timeline name to fix a use-after-free

[Philipp Stanner]

On Fri, 2026-09-04 at 11:57 +0200, Danilo Krummrich wrote:
> On Fri Sep 4, 2026 at 10:06 AM CEST, Jonghyuk Kim(MalHyuk) wrote:
> > Fixes: 506aa8b02a8d ("dma-fence: Add safe access helpers and document the rules")
> > Cc: stable@xxxxxxxxxxxxxxx # we don't know since when
> 
> How is that?

That is referring to the fact that it only is a reachable bug if the
respective driver exposes a mechanism that runs into
get_timeline_name().

> 
> More in general, putting "we don't know since when" for the stable folks is
> rough. If neither the author of the patch nor the maintainers of the subsystem
> can figure it out, how are the stable folks supposed to?

That's on me, it was a joking phrase by me that Jonghyuk or his LLM
picked up 1:1.

Anyways. So would you suggest backporting a fix as far as possible to
the amd origin commit? That might not be backportable that far, so
stable would still have to figure it out.


P.