Patch "drm/amdgpu: fix UBSAN warning in kv_dpm.c" has been added to the 4.19-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amdgpu: fix UBSAN warning in kv_dpm.c

to the 4.19-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-fix-ubsan-warning-in-kv_dpm.c.patch
and it can be found in the queue-4.19 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7113d17e9256dd65a6b7f16e635e0efd52f70c7e
Author: Alex Deucher <alexander.deucher@xxxxxxx>
Date:   Mon May 20 09:05:21 2024 -0400

    drm/amdgpu: fix UBSAN warning in kv_dpm.c
    
    [ Upstream commit f0d576f840153392d04b2d52cf3adab8f62e8cb6 ]
    
    Adds bounds check for sumo_vid_mapping_entry.
    
    Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3392
    Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Cc: stable@xxxxxxxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
index 91a1628cd48fc..77a8d94b8ac76 100644
--- a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/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 =




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