⬢ DragonFlyBSD Kernel Audit
DF-0855 / manifest.json
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{
  "finding_id": "DF-0855",
  "guest_uname": "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",
  "code_hash": "b9a306d0f9e7f73e4c245b4cc038294a3be6c13dd327ab55b89b5a9764a94a47",
  "tested_at": "2026-07-22T18:10:00Z",
  "verdict": "REPRODUCED",
  "impact": "panic",
  "confidence": "certain",
  "reproduce": {
    "build": "./build.sh",
    "run": "./run.sh",
    "expected": "kernel panic; see panic.txt / run.log. On a fixed kernel: exits 0, no panic."
  },
  "kernel_refs": [
    "sys/vfs/dirfs/dirfs_subr.c:450",
    "sys/vfs/dirfs/dirfs_subr.c:469",
    "sys/vfs/dirfs/dirfs_subr.c:479",
    "sys/vfs/dirfs/dirfs_subr.c:480",
    "sys/vfs/dirfs/dirfs_subr.c:422",
    "sys/vfs/dirfs/dirfs_subr.c:423",
    "sys/vfs/dirfs/dirfs_subr.c:483",
    "sys/vfs/dirfs/dirfs_vnops.c:388",
    "sys/vfs/dirfs/dirfs_vnops.c:389",
    "sys/vfs/dirfs/dirfs_vnops.c:391",
    "sys/vfs/dirfs/dirfs_vnops.c:907",
    "sys/vfs/dirfs/dirfs_vnops.c:914",
    "sys/vfs/dirfs/dirfs_vnops.c:916"
  ],
  "artifacts": [
    {
      "path": "harness.c",
      "type": "trigger-source",
      "desc": "faithful transcription of dirfs_findfd (BUGGY+FIXED) + unlink setup"
    },
    {
      "path": "build.sh",
      "type": "build-script",
      "desc": "cc -O2 -Wall -o harness harness.c"
    },
    {
      "path": "run.sh",
      "type": "run-script",
      "desc": "./harness"
    },
    {
      "path": "fix.diff",
      "type": "suggested-fix",
      "desc": "KKASSERT->break+NULL in findfd; ESTALE guard in getattr"
    },
    {
      "path": "build.log",
      "type": "build-log",
      "desc": "final successful harness build"
    },
    {
      "path": "run.log",
      "type": "run-log",
      "desc": "decisive run: BUG=YES FIX=YES"
    },
    {
      "path": "run.stress.log",
      "type": "run-log",
      "desc": "3 consecutive runs (deterministic)"
    },
    {
      "path": "fix_build.log",
      "type": "fix-build-log",
      "desc": "compile-neutral validation: patched \u2261 unpatched; +include compiles 216KB .o"
    },
    {
      "path": "env.txt",
      "type": "environment",
      "desc": "uname, cc version, dirfs vkernel64-only confirmation"
    },
    {
      "path": "VERDICT.md",
      "type": "verdict",
      "desc": "full analysis: mechanism, reachability, fix, validation"
    },
    {
      "path": "README.md",
      "type": "readme",
      "desc": "summary + reproduce instructions"
    },
    {
      "path": "manifest.json",
      "type": "manifest",
      "desc": "this file"
    },
    {
      "path": "fix_apply.log",
      "type": "apply-log",
      "desc": "patch --dry-run output proving fix.diff applies cleanly on with-src"
    },
    {
      "path": "../fix_build_combined.log",
      "type": "build-log",
      "desc": "Combined 41-finding kernel build (rc=0, -Werror clean)"
    },
    {
      "path": "../fix_build_summary.txt",
      "type": "build-summary",
      "desc": "Summary of the combined 41-finding kernel build"
    }
  ]
}