# DF-3001 PoC evidence pack

## What
hammer_vop_setattr applies va_atime/va_mtime with no ownership/privilege check (NFS SETATTR forge).

## Build
```
make (KMOD dfv_safe)
```

## Run
```
mount hammer1+ufs rigs; kldload dfv_safe.ko; sysctl -w dfv.sa3001=1
```

## Expected
HAMMER: VOP_SETATTR non-owner -> 0, mtime forged; UFS control -> EPERM

Guest: DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:04 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
All logs are full untrimmed captures unless noted. fix.diff is the
git-apply-able verified fix (authored after verification; never applied
to the audit tree).