⬢ DragonFlyBSD Kernel Audit
DF-5528 / manifest.json
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{
  "finding_id": "DF-5528",
  "manifest_version": 1,
  "verdict": "untested (hardware-gated)",
  "impact": "none (latent: potential panic/UAF on privileged unload once a firewire-bus child vetoes detach)",
  "reproduce": {
    "build": "none possible/required — defect is in the newbus parent/child detach protocol, executable only on real FireWire OHCI hardware (PCI 0c/10/10); see build.sh",
    "run": "./check_guest.sh  (documents the audit guest has no OHCI controller; decisive output in run.log)",
    "expected": "On real hardware with a vetoing child (e.g. sbp EBUSY guard): kldunload reports success, firewire watchdog callout keeps firing after BAR unmap/bst-bsh zeroing -> page-0 OWRITE -> panic; with fix.diff the unload fails with the child's error and nothing is torn down"
  },
  "kernel_refs": [
    "sys/bus/firewire/fwohci_pci.c:341-386",
    "sys/bus/firewire/fwohci_pci.c:350",
    "sys/bus/firewire/fwohci_pci.c:351-354",
    "sys/bus/firewire/fwohci_pci.c:375-379",
    "sys/bus/firewire/fwohci_pci.c:385",
    "sys/kern/subr_bus.c:1284-1310",
    "sys/kern/subr_bus.c:2128-2154",
    "sys/bus/firewire/firewire.c:453-487",
    "sys/bus/firewire/firewire.c:402-403",
    "sys/bus/firewire/firewire.c:468-471",
    "sys/bus/firewire/fwohci.c:764-785"
  ],
  "artifacts": [
    "README.md",
    "VERDICT.md",
    "check_guest.sh",
    "build.sh",
    "run.sh",
    "run.log",
    "env.txt",
    "fix.diff",
    "manifest.json",
    "verdict.json"
  ]
}