From a8c6df9fe5bc390645d1e96eff14ffe414951aad Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 20 May 2024 09:11:45 -0400
Subject: [PATCH] drm/radeon: fix UBSAN warning in kv_dpm.c
commit a498df5421fd737d11bfd152428ba6b1c8538321 upstream.
Adds bounds check for sumo_vid_mapping_entry.
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/radeon/sumo_dpm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/radeon/sumo_dpm.c b/drivers/gpu/drm/radeon/sumo_dpm.c
index 45d04996adf5..a80e2edb7c0f 100644
--- a/drivers/gpu/drm/radeon/sumo_dpm.c
+++ b/drivers/gpu/drm/radeon/sumo_dpm.c
@@ -1621,6 +1621,8 @@ void sumo_construct_vid_mapping_table(struct radeon_device *rdev,
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 =