Guest: QEMU/KVM (dfbsd-qemu/vm.sh), 6 vCPU, 4GB RAM, virtio disk/net.
Stock kernel (all DF-2655 stock-kernel evidence):
  DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026
      root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
  kern.ident: X86_64_GENERIC  (INVARIANTS build; hammer2 in kernel; DDB in kernel)
Fix kernel #1 (fix.diff applied; fix validation runs):
  DragonFly 6.5-DEVELOPMENT #1: Tue Oct 20 03:15:00 UTC 2026
      root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC
  built with: cd /usr/src && make -j6 nativekernel KERNCONF=X86_64_GENERIC
  (k1build.log: BUILD_RC=0, 6 min wall) + make installkernel + reboot
Toolchain: cc 8.3 [DragonFly] Release/2019-02-22
vfs.usermount: 0  (mounting crafted images requires root on this config)
hw.ncpu: 6
/usr/src/sys/vfs/hammer2/hammer2_strategy.c md5 = 4c0018e3b60e8a23d41863f85f5644d4
  (identical to the audited tree; re-verified before each kernel build)
Patch tool: h2zsub (this pack) built against guest /usr/src kernel sources
  (icrc32.c, xxhash.c) — sha256
  4fb1e27842880ac0fadac4ff91d8339e695367763a4bf44b9aa66efc2be68d21
Image: 2GB newfs_hammer2, PFS "LOCAL", zdir comp zlib:6 (setcomp),
zfile/lzfile 114688B compressible content
  md5 original content: 876569bdd45df2756a69a3fe85660f2a
  md5 fabricated read : b1e63222a373994ee242ce1a7e3da0fc (first 64KB zeroed)
Kernel patches applied during validation were reverted/reset afterwards
(vm.sh reset with-src); final guest state: clean-source snapshot.