{
 "finding_id": "DF-3132",
 "verdict": "reproduced",
 "impact": "corruption",
 "confidence": "certain",
 "reproduce": {
  "build": "host: python3 craft_curfat.py out.img (FATs=1 extflags=0x8F; landing zone seeded with a FAT copy)",
  "run": "guest: vnconfig -c -S 64m /dev/vn0 img && mount_msdos /dev/vn0 /mnt && echo hi > /mnt/NEW.TXT && umount, then hexdump sectors 32 and 152",
  "expected": "real FAT unchanged; NEW.TXT chain (entry 7 EOC) written at sector 152 inside CANARY.BIN clusters"
 },
 "kernel_refs": [
  "sys/vfs/msdosfs/msdosfs_vfsops.c:409-410",
  "sys/vfs/msdosfs/msdosfs_fat.c:87"
 ],
 "artifacts": [
  "craft_curfat.py",
  "run_guest.sh",
  "run.log",
  "README.md",
  "VERDICT.md",
  "build.sh",
  "run.sh",
  "manifest.json",
  "verdict.json",
  "fix.diff",
  "env.txt",
  "compile_validation.txt"
 ]
}