Re: [PATCH AUTOSEL 6.6 09/11] drm/amd: Fix UBSAN array-index-out-of-bounds for Powerplay headers

From: Sasha Levin
Date: Sun Nov 12 2023 - 13:51:49 EST


On Sun, Nov 12, 2023 at 01:00:37PM -0500, Alex Deucher wrote:
On Sun, Nov 12, 2023 at 8:27 AM Sasha Levin <sashal@xxxxxxxxxx> wrote:

From: Alex Deucher <alexander.deucher@xxxxxxx>

[ Upstream commit 49afe91370b86566857a3c2c39612cf098110885 ]

For pptable structs that use flexible array sizes, use flexible arrays.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2039926
Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

I don't think any of these UBSAN flexible array changes are stable material.

I'll drop it, but in general we've been taking kasan/ubsan/kcsan/...
annotation fixes since it enables (easier) testing on the LTS trees, and
for example finding issues specific to those LTS trees.
--
Thanks,
Sasha