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The VFCT path accepted whatever kmemdup() returned without checking that the copied image is a valid VBIOS. Every other radeon BIOS fetch path verifies the 0x55 0xaa signature before trusting the image; the VFCT path is the odd one out. Check the signature after copying the image and reject it (freeing the buffer) if it does not match, matching the amdgpu VFCT path which validates via check_atom_bios(). Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patch.msgid.link/20260708193518.702584-6-mario.limonciello@amd.com Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>