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| author | Denis Arefev <arefev@swemel.ru> | 2025-03-21 13:52:33 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-03-26 17:41:31 -0400 |
| commit | 4e3d9508c056d7e0a56b58d5c81253e2a0d22b6c (patch) | |
| tree | 1e0c4212b2c6d0ce95784411dc51b1975765978a /drivers/gpu | |
| parent | 7d641c2b83275d3b0424127b2e0d2d0f7dd82aef (diff) | |
| download | linux-4e3d9508c056d7e0a56b58d5c81253e2a0d22b6c.tar.gz linux-4e3d9508c056d7e0a56b58d5c81253e2a0d22b6c.tar.bz2 linux-4e3d9508c056d7e0a56b58d5c81253e2a0d22b6c.zip | |
drm/amd/pm: Prevent 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.
Fixes: 031db09017da ("drm/amd/powerplay/vega20: enable fan RPM and pwm settings V2")
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c index a3331ffb2daf..1b1c88590156 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c @@ -191,7 +191,7 @@ int vega20_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed) uint32_t tach_period, crystal_clock_freq; int result = 0; - if (!speed) + if (!speed || speed > UINT_MAX/8) return -EINVAL; if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) { |