drm/amdgpu: Validate ATIF buffer length before use

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Add a min_size parameter to amdgpu_atif_call() to validate that the
returned ACPI buffer is of type ACPI_TYPE_BUFFER, holds at least a u16
size field, does not claim more data than was actually returned, and
meets the minimum size required by the calling function. Each caller
passes its required minimum via sizeof() or offsetof() of the expected
output struct and drops its own size check.

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 17:43:32 +05:30 • committed by Alex Deucher

parent 5afa19c41e

commit b978b7d439

1 changed files with 34 additions and 34 deletions

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

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