linux-kernel - Re: [PATCH 0/5] drm/amd/pm: Prevent division by zero

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Message-ID: <CADnq5_MsNtgObTgUWNQkS6EsHhXwVyi8EYROdhyvVin8YMsq5Q@mail.gmail.com>
Date: Fri, 21 Mar 2025 09:40:14 -0400
From: Alex Deucher <alexdeucher@...il.com>
To: Denis Arefev <arefev@...mel.ru>
Cc: Kenneth Feng <kenneth.feng@....com>, Alex Deucher <alexander.deucher@....com>, 
	Christian König <christian.koenig@....com>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Lijo Lazar <lijo.lazar@....com>, 
	Ma Jun <Jun.Ma2@....com>, Mario Limonciello <mario.limonciello@....com>, 
	Srinivasan Shanmugam <srinivasan.shanmugam@....com>, Yang Wang <kevinyang.wang@....com>, 
	amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH 0/5] drm/amd/pm: Prevent division by zero

On Fri, Mar 21, 2025 at 6:53 AM Denis Arefev <arefev@...mel.ru> wrote:
>
> This series of patches prevents possible division by zero.
>
> The user can set any speed value.
> If speed is greater than UINT_MAX/8, division by zero is possible.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.

Applied the series.  Thanks!

Alex

>
> Denis Arefev (5):
>   drm/amd/pm: Prevent division by zero
>   drm/amd/pm: Prevent division by zero
>   drm/amd/pm: Prevent division by zero
>   drm/amd/pm: Prevent division by zero
>   drm/amd/pm: Prevent division by zero
>
>  drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_thermal.c   | 6 +++---
>  drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c | 4 ++--
>  drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c | 2 +-
>  drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c       | 3 +++
>  drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c          | 2 +-
>  5 files changed, 10 insertions(+), 7 deletions(-)
>
> I did not change these files, because the functions you are
> interested in are not used there for a long time.
> drivers/gpu/drm/radeon/si_dpm.c
> drivers/gpu/drm/radeon/ci_dpm.c
>
> --
> 2.43.0
>