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

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Message-ID: <ZVEewK-GAnRsrPA3@sashalap>
Date:   Sun, 12 Nov 2023 13:51:44 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org,
        Mario Limonciello <mario.limonciello@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH AUTOSEL 6.6 09/11] drm/amd: Fix UBSAN
 array-index-out-of-bounds for Powerplay headers

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@...nel.org> wrote:
>>
>> From: Alex Deucher <alexander.deucher@....com>
>>
>> [ 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@....com>
>> Acked-by: Christian König <christian.koenig@....com>
>> Signed-off-by: Alex Deucher <alexander.deucher@....com>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>
>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