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drm/amdgpu: fix UBSAN warning in kv_dpm.c 

[ Upstream commit f0d576f840153392d04b2d52cf3adab8f62e8cb6 ]

Adds bounds check for sumo_vid_mapping_entry.

This fixes CVE-2024-40987

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3392
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Huang Cun <cunhuang@tencent.com>
Signed-off-by: Jianping Liu <frankjpliu@tencent.com>
This commit is contained in:
Alex Deucher 2024-05-20 09:05:21 -04:00 committed by Jianping Liu
parent e5a6af703f
commit 7ff783861e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/kv_dpm.c
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@ -163,6 +163,8 @@ static void sumo_construct_vid_mapping_table(struct amdgpu_device *adev,
for (i = 0; i < SUMO_MAX_HARDWARE_POWERLEVELS; i++) {
if (table[i].ulSupportedSCLK != 0) {
if (table[i].usVoltageIndex >= SUMO_MAX_NUMBER_VOLTAGES)
continue;
vid_mapping_table->entries[table[i].usVoltageIndex].vid_7bit =
table[i].usVoltageID;
vid_mapping_table->entries[table[i].usVoltageIndex].vid_2bit =