{
 "finding_id": "DF-3094",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "likely",
 "verdict": "The claimed panic path is not reachable by geometry crafting on this guest, and the current code propagates FAT read errors correctly: (a) crafting BPB sectors-per-FAT=32767 on an 8MB image is rejected at mount (mount_msdos: Invalid argument - geometry validated); (b) with the mount-accepted original geometry, 300x64KB extending writes complete cleanly; (c) the cited chain in the current tree returns the bread error (fatentry, msdosfs_fat.c:495-498 returns after brelse on bread failure) and extendfile propagates fatentry errors. Demonstrating the claimed assert requires genuine device I/O failure (failing media) which the vn-backed rig cannot inject. Refuted as-written on this tree unless real I/O errors hit an assert elsewhere in the chain.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/msdosfs/msdosfs_fat.c:495",
  "sys/vfs/msdosfs/msdosfs_fat.c:400"
 ],
 "poc_changes": "adjusted from finding sketch to guest syscall/layout reality",
 "attempts": 2,
 "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64",
 "runtime_sec": 60,
 "guest_dirty": 0,
 "build_cmd": "guest: cc -O2 -o <bin> <src>.c -pthread",
 "run_cmd": "see README.md",
 "code_hash": "bb9affe56b4db4bddf237b680c7635a061d47a2f5ea5ca5c986893b375b3c8d1",
 "notes": "fix_status: not_testable (not reproduced)",
 "recommended_fix": "No fix required for the cited site (bread errors already propagate); optional hardening: initialize bp = NULL before bread in fatentry and guard brelse(bp) for bp == NULL.\n"
}