[PATCH v2] drm/i915: Fix CFI violations in gt_sysfs

[Nathan Chancellor]

Hi Jocelyn,

On Thu, Jan 12, 2023 at 11:08:17AM +0100, Jocelyn Falempe wrote:
> This patch does also solve a kernel crash when reading
> /sys/class/drm/card1/gt/gt0/* on a skylake machine:
> https://bugzilla.redhat.com/show_bug.cgi?id=2154880

Interesting, I wonder what aspect of this patch fixes this because I am
not sure that is an intended consequence of this change but that is
still good to hear!

For the record, this is commit a8a4f0467d70 ("drm/i915: Fix CFI
violations in gt_sysfs") in mainline.

> Do you think it can be backported to stable releases ?
> Conflicts are trivial on top of v6.0 at least.

I had a report from another user of this crash affecting them with kCFI
so it is on my TODO to backport it to 6.1 (6.0 just went EOL) but I am
currently out of the office until next Wednesday so I won't be able to
get to it until then (as I would like to test the backport on affected
hardware). If someone wants to beat me to it, I won't complain ;)

Cheers,
Nathan