drm/amd/pm: Validate Tonga PPTable subtable bounds

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v1:
Tonga PPTable parsing also relies on VBIOS offsets, revision fields
and entry counts for several subtables. Malformed data can cause
out-of-bounds reads, while voltage lookup tables can overrun their
fixed-size destination arrays.

Add common bounds helpers and validate fixed subtables, dynamic entry
arrays and revision-specific layouts before consuming voltage lookup,
dependency, PCIE, power-tune, hard-limit, thermal, fan, GPIO, PPM and
VCE state data.

v2:
correct to handle get_tonga_ppm_table() return value.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Yang Wang 2026-06-23 16:37:07 +08:00 • committed by Alex Deucher

parent 9914149f99

commit 53ef33c084

1 changed files with 521 additions and 85 deletions

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drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c

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