⬢ DragonFlyBSD Kernel Audit
DF-0998 / manifest.json
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{
  "finding_id": "DF-0998",
  "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": "NOT_TESTABLE",
  "impact": "none",
  "confidence": "likely",
  "reproduce": {
    "build": "n/a \u2014 KLD module compiles but no HW",
    "run": "n/a \u2014 requires RT2573 USB WiFi adapter and an mbuf > MCLBYTES (BPF raw injection or high MTU)",
    "expected": "no effect on this guest (not reproduced); exits cleanly. See VERDICT.md."
  },
  "kernel_refs": [
    "sys/bus/u4b/wlan/if_rum.c:438",
    "sys/bus/u4b/wlan/if_rum.c:1057",
    "sys/bus/u4b/wlan/if_rum.c:1060",
    "sys/bus/u4b/wlan/if_rum.c:1063",
    "sys/bus/u4b/wlan/if_rum.c:1064"
  ],
  "artifacts": [
    {
      "path": "fix.diff",
      "type": "suggested-fix",
      "desc": "clamp m_pkthdr.len to MCLBYTES (not MCLBYTES + RT2573_TX_DESC_SIZE)"
    },
    {
      "path": "module_build.log",
      "type": "build-log",
      "desc": "if_rum.ko compiles cleanly with the fix applied"
    },
    {
      "path": "VERDICT.md",
      "type": "verdict",
      "desc": "full narrative with arithmetic proof of the 16-byte overflow"
    },
    {
      "path": "README.md",
      "type": "readme",
      "desc": "summary"
    },
    {
      "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": "env.txt",
      "type": "environment",
      "desc": "guest uname, modules, HW-gate note"
    },
    {
      "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"
    }
  ]
}