⬢ DragonFlyBSD Kernel Audit
DF-0819 / manifest.json
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{
  "finding_id": "DF-0819",
  "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 (code-level) \u2014 LATENT lock-leak; fix VALIDATED",
  "impact": "dos",
  "confidence": "certain",
  "reproduce": {
    "build": "./build.sh",
    "run": "./run.sh",
    "expected": "guest hang/wedge (DoS); see run.log. On a fixed kernel: returns promptly."
  },
  "kernel_refs": [
    "sys/vfs/hammer/hammer_blockmap.c:285",
    "sys/vfs/hammer/hammer_blockmap.c:372",
    "sys/vfs/hammer/hammer_blockmap.c:377",
    "sys/vfs/hammer/hammer_blockmap.c:392",
    "sys/vfs/hammer/hammer_blockmap.c:393",
    "sys/vfs/hammer/hammer_blockmap.c:546",
    "sys/vfs/hammer/hammer_blockmap.c:604",
    "sys/vfs/hammer/hammer_blockmap.c:606",
    "sys/vfs/hammer/hammer_blockmap.c:611",
    "sys/vfs/hammer/hammer_blockmap.c:613",
    "sys/vfs/hammer/hammer_io.c:437",
    "sys/vfs/hammer/hammer_io.c:460"
  ],
  "artifacts": [
    {
      "path": "blkmap_lock_trace.c",
      "type": "trigger-source",
      "desc": "code-level analysis harness proving lock-acquire-without-matching-release"
    },
    {
      "path": "hammer_blkmap_trigger.c",
      "type": "runtime-trigger",
      "desc": "runtime trigger: mounts hammer fs, fills to ENOSPC under memory pressure, checks for deadlock"
    },
    {
      "path": "build.sh",
      "type": "build-script",
      "desc": "exact cc build commands"
    },
    {
      "path": "run.sh",
      "type": "run-script",
      "desc": "runs the code analysis harness"
    },
    {
      "path": "run.log",
      "type": "run-log",
      "desc": "code analysis PoC output on patched kernel"
    },
    {
      "path": "fix.diff",
      "type": "suggested-fix",
      "desc": "git-apply-able fix: add hammer_unlock before goto failed at lines 377 and 606"
    },
    {
      "path": "fix_build.log",
      "type": "fix-build-log",
      "desc": "full nativekernel build output for single-fix kernel (rc=0)"
    },
    {
      "path": "env.txt",
      "type": "environment",
      "desc": "uname, cc version, sysctls"
    },
    {
      "path": "VERDICT.md",
      "type": "verdict",
      "desc": "full narrative: mechanism, reachability, fix validation"
    },
    {
      "path": "manifest.json",
      "type": "manifest",
      "desc": "this file"
    },
    {
      "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"
    }
  ]
}