⬢ DragonFlyBSD Kernel Audit
DF-0981 / manifest.json
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{
  "finding_id": "DF-0981",
  "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 harness)",
  "impact": "heap-oob-write (hardware-gated on this guest)",
  "confidence": "certain",
  "reproduce": {
    "build": "./build.sh",
    "run": "./run.sh",
    "expected": "bug manifests; see run.log / VERDICT.md. On a fixed kernel: no effect."
  },
  "kernel_refs": [
    "sys/bus/u4b/wlan/if_run.c:2989",
    "sys/bus/u4b/wlan/if_run.c:2996",
    "sys/bus/u4b/wlan/if_run.c:3003",
    "sys/bus/u4b/wlan/if_run.c:3013",
    "sys/bus/u4b/wlan/if_run.c:3023",
    "sys/kern/uipc_mbuf.c:1671",
    "sys/bus/u4b/wlan/if_runvar.h:26",
    "sys/bus/u4b/wlan/if_runreg.h:834",
    "sys/sys/param.h:497"
  ],
  "artifacts": [
    {
      "path": "run_aggr_oob.c",
      "type": "trigger-source",
      "desc": "faithful reimplementation of run_bulk_rx_callback aggregated-frame / dmalen / m_copydata logic with guard-padded destination buffers; BEFORE path overflows, AFTER path does not"
    },
    {
      "path": "build.sh",
      "type": "build-script",
      "desc": "cc -O2 -Wall -o run_aggr_oob run_aggr_oob.c"
    },
    {
      "path": "run.sh",
      "type": "run-script",
      "desc": "./run_aggr_oob"
    },
    {
      "path": "build.log",
      "type": "build-log",
      "desc": "baseline (unpatched) if_run.ko kernel module build under -Werror, rc=0"
    },
    {
      "path": "run.log",
      "type": "run-log",
      "desc": "harness decisive run: BEFORE OOB 956B, AFTER no overflow"
    },
    {
      "path": "fix_build.log",
      "type": "fix-build-log",
      "desc": "patched if_run.ko module build under -Werror, rc=0"
    },
    {
      "path": "fix_run.log",
      "type": "fix-run-log",
      "desc": "harness AFTER-section: fixed path, no overflow"
    },
    {
      "path": "fix.diff",
      "type": "suggested-fix",
      "desc": "git-apply-able: m_getcl->m_getjcl(MJUMPAGESIZE) + defense-in-depth bound on dmalen"
    },
    {
      "path": "env.txt",
      "type": "environment",
      "desc": "uname, cc 8.3, kldstat (run not loaded), usbconfig (no device)"
    },
    {
      "path": "README.md",
      "type": "readme",
      "desc": "human-facing repro + reachability notes"
    },
    {
      "path": "VERDICT.md",
      "type": "verdict",
      "desc": "full narrative + line-by-line trace + exploit-chain characterization"
    },
    {
      "path": "manifest.json",
      "type": "manifest",
      "desc": "this catalog"
    },
    {
      "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"
    }
  ]
}