⬢ DragonFlyBSD Kernel Audit
DF-0889 / manifest.json
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{
  "finding_id": "DF-0889",
  "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": "dos",
  "confidence": "certain",
  "reproduce": {
    "build": "./build.sh",
    "run": "./run.sh 100",
    "expected": "guest hang/wedge (DoS); see run.log. On a fixed kernel: returns promptly."
  },
  "kernel_refs": [
    "sys/vfs/hpfs/hpfs_vfsops.c:262",
    "sys/vfs/hpfs/hpfs_vfsops.c:267",
    "sys/vfs/hpfs/hpfs_vfsops.c:274",
    "sys/vfs/hpfs/hpfs_vfsops.c:285",
    "sys/vfs/hpfs/hpfs_vfsops.c:290",
    "sys/vfs/hpfs/hpfs_vfsops.c:303",
    "sys/vfs/hpfs/hpfs_vfsops.c:308",
    "sys/vfs/hpfs/hpfs_vfsops.c:316",
    "sys/vfs/hpfs/hpfs_vfsops.c:328"
  ],
  "artifacts": [
    {
      "path": "run.sh",
      "type": "trigger-source",
      "desc": "vnode-backed image + N failed mounts + vmstat -m delta"
    },
    {
      "path": "build.sh",
      "type": "trigger-source",
      "desc": "no-op (pure shell harness, nothing to compile)"
    },
    {
      "path": "fix.diff",
      "type": "suggested-fix",
      "desc": "kfree(hpmp) in failed: cleanup + defensive hpmp=NULL initializer"
    },
    {
      "path": "baseline_run.log",
      "type": "run-log",
      "desc": "unpatched #0 kernel: 100 mounts -> 100 leaked HPFS_mount (150 KB)"
    },
    {
      "path": "run.log",
      "type": "run-log",
      "desc": "unpatched #0 kernel: 200 mounts -> 200 leaked HPFS_mount (300 KB)"
    },
    {
      "path": "fix_run.log",
      "type": "run-log",
      "desc": "patched #1 kernel + rebuilt hpfs.ko: 100 mounts -> 0 leaked"
    },
    {
      "path": "fix_run_1000.log",
      "type": "run-log",
      "desc": "patched #1 kernel stress: 1000 mounts -> 0 leaked"
    },
    {
      "path": "fix_build.log",
      "type": "build-log",
      "desc": "full nativekernel build log (rc=0, ~3 min)"
    },
    {
      "path": "env.txt",
      "type": "environment",
      "desc": "uname, cc 8.3, sysctls"
    },
    {
      "path": "VERDICT.md",
      "type": "verdict",
      "desc": "full narrative: mechanism, trace, fix, validation"
    },
    {
      "path": "README.md",
      "type": "readme",
      "desc": "human-facing summary + reproduce instructions"
    },
    {
      "path": "manifest.json",
      "type": "manifest",
      "desc": "this catalog"
    },
    {
      "path": "build.log",
      "type": "build-log",
      "desc": "kernel build log excerpt proving -Werror clean compile of patched source"
    },
    {
      "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"
    }
  ]
}