ACK: [SRU][OEM-5.17/OEM-6.0][PATCH 0/2] CVE-2022-4139

[Tim Gardner]

On 4/20/23 11:14 AM, Magali Lemes wrote:
> [Impact]
> The Intel i915 graphics driver in the Linux kernel did not perform a GPU TLB
> flush in some situations. A local attacker could use this to cause a denial of
> service or possibly execute arbitrary code.
> 
> [Backport]
> Clean cherry-pick.
> In the OEM-5.17 case, it was also necessary to cherry-pick a1c5a7bf79, just
> like it was done in the OEM-5.14 backport[1], so that the fix commit could be
> applied cleanly. We're also using the equivalent fix commit from linux-5.15.y,
> which doesn't rely on the COMPUTE_CLASS macro, that isn't defined in OEM-5.17.
> 
> [Test]
> Compile and boot tested.
> 
> [Regression potential]
> Intel's Gen12 GPU users could be affected.
> 
> [1] https://lists.ubuntu.com/archives/kernel-team/2023-January/136286.html
> 
> Andrzej Hajda (1):
>    drm/i915: fix TLB invalidation for Gen12 video and compute engines
> 
> Chris Wilson (1):
>    drm/i915/gt: Serialize TLB invalidates with GT resets
> 
>   drivers/gpu/drm/i915/gt/intel_gt.c | 20 +++++++++++++++++++-
>   1 file changed, 19 insertions(+), 1 deletion(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
-- 
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Tim Gardner
Canonical, Inc