drm/amd/pm: Guard VBIOS AC timing table walk

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Reject AC timing blocks with a stride smaller than a dword before walking
VBIOS data. A zero stride can otherwise keep reg_data pinned on a
nonmatching MEM_ID forever.

Also bound the data-block and END marker reads by the returned VRAM_Info
table size so malformed index/data sizes do not push the timing walk past
the table.

Signed-off-by: Xiang Liu <xiang.liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Xiang Liu 2026-06-23 10:59:18 +08:00 • committed by Alex Deucher

parent 2d22278057

commit 2bf6867e59

1 changed files with 22 additions and 6 deletions

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drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c

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