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| author | Denis Arefev <arefev@swemel.ru> | 2025-03-21 13:52:31 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-03-26 17:41:03 -0400 |
| commit | f23e9116ebb71b63fe9cec0dcac792aa9af30b0c (patch) | |
| tree | b37da3848ad16007c93976aab86263c3afea19ac | |
| parent | cf05922d63e2ae6a9b1b52ff5236a44c3b29f78c (diff) | |
| download | linux-f23e9116ebb71b63fe9cec0dcac792aa9af30b0c.tar.gz linux-f23e9116ebb71b63fe9cec0dcac792aa9af30b0c.tar.bz2 linux-f23e9116ebb71b63fe9cec0dcac792aa9af30b0c.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: c05d1c401572 ("drm/amd/swsmu: add aldebaran smu13 ip support (v3)")
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c index 0915d6377613..ba5a9012dbd5 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c @@ -1226,7 +1226,7 @@ int smu_v13_0_set_fan_speed_rpm(struct smu_context *smu, uint32_t tach_period; int ret; - if (!speed) + if (!speed || speed > UINT_MAX/8) return -EINVAL; ret = smu_v13_0_auto_fan_control(smu, 0); |