# DF-4070 — vegam MCLK MemoryLevel heap OOB write; count=5 already overflows (pass 2)

File: sys/dev/drm/amd/powerplay/smumgr/vegam_smumgr.c:1047-1074

Build (guest probe): cd /tmp && cc -I/usr/src/sys/dev/drm/amd/powerplay/inc -o probe probe.c
Run: ./probe
Expected: MemoryLevel=32B, capacity 4*32=128B; count=5 -> byte 160 (already OOB); count=255 -> 8160B.
Full trigger needs VegaM GPU + crafted VBIOS pptable (absent). Hardware-gated.