[PATCH 1/2] drm/amdgpu: fix UBSAN warning in kv_dpm.c

[Alex Deucher]

Adds bounds check for sumo_vid_mapping_entry.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3392
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
index 6bb42d04b247..e8b6989a40f3 100644
--- a/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
+++ b/drivers/gpu/drm/amd/pm/legacy-dpm/kv_dpm.c
@@ -164,6 +164,8 @@ 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 =
-- 
2.45.1