drm/amdgpu: Validate ATPX buffer length before use

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Add amdgpu_atpx_buffer_validate() to check that the returned ACPI
buffer is of type ACPI_TYPE_BUFFER, is large enough to hold the u16
size field, and that the BIOS-reported size does not exceed the actual
allocation length or fall below the minimum required by the caller.
Use it in VERIFY_INTERFACE and GET_PX_PARAMETERS callers.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Assisted-by: Claude Sonnet (Cursor AI)
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Lijo Lazar 2026-05-18 17:43:44 +05:30 • committed by Alex Deucher

parent b978b7d439

commit 916867cd75

1 changed files with 21 additions and 12 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c

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