RUN_START
DF-1251 combios_parse_mmio_table harness
BIOS allocation = 512 bytes; table starts at 0x40 (no in-bounds terminator)
RBIOS8/16/32 reads past BIOS allocation (OOB): 2
WREG32 GPU-MMIO writes with heap-sourced addr/val: 75

PRIMITIVE CONFIRMED: unbounded loop read 2 words past rdev->bios into heap,
and wrote 75 (addr,val) pairs to GPU MMIO (WREG32). Bug is REAL.
EXIT=0