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

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Message-ID: <20250321105239.10096-1-arefev@swemel.ru>
Date: Fri, 21 Mar 2025 13:52:30 +0300
From: Denis Arefev <arefev@...mel.ru>
To: Kenneth Feng <kenneth.feng@....com>
Cc: 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: [PATCH 0/5] drm/amd/pm: Prevent division by zero

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. 

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