⬢ DragonFlyBSD Kernel Audit
DF-4328 / verdict.json
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{
  "finding_id": "DF-4328",
  "status": "untested",
  "reproduced": 0,
  "impact": "none",
  "confidence": "likely",
  "verdict": "Source-level finding, not exercisable on the audit guest: sf_attach()s bus_setup_intr() failure path double-ether_ifdetaches the ifnet (sf_detach runs the teardown again because device_is_attached() is still true) and passes a NULL intr cookie to bus_teardown_intr. Non-idempotent if_detach corrupts ifnet lists / double-decrements cluster limits. Requires IRQ-setup failure at kldload/boot on sf(4) hardware (privileged trigger) - Low.",
  "exploit_chain": "",
  "evidence": "VERDICT.md path:line analysis (if_sf.c:777-787, 796-820; sys/net/if.c:949+)",
  "kernel_refs": [
    "sys/dev/netif/sf/if_sf.c:777",
    "sys/dev/netif/sf/if_sf.c:778",
    "sys/dev/netif/sf/if_sf.c:786",
    "sys/dev/netif/sf/if_sf.c:802",
    "sys/dev/netif/sf/if_sf.c:799"
  ],
  "poc_changes": "none (no PoC run)",
  "attempts": 0,
  "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",
  "runtime_sec": 0,
  "guest_dirty": 0,
  "build_cmd": "",
  "run_cmd": "",
  "code_hash": "",
  "notes": "hardware-gated (no AIC-6915 on guest); root/admin-triggered; Low severity - verification skipped per contract",
  "recommended_fix": "remove premature ether_ifdetach() in the attach error path; NULL-guard bus_teardown_intr cookie",
  "fix_status": "not_testable",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "no hardware path on guest to validate",
  "fix_evidence": "fix.diff authored"
}