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>

diff --git a/drivers/gpu/drm/radeon/sumo_dpm.c b/drivers/gpu/drm/radeon/sumo_dpm.c
index 45d04996adf5bd2330691f75255857b838b3ab94..a80e2edb7c0f3e32e3f61a91e7f2e80ed9b54752 100644 (file)
--- 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 =