⬢ DragonFlyBSD Kernel Audit
DF-4692 / manifest.json
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{
  "finding_id": "DF-4692",
  "title": "sili_pm: sili_pm_read/sili_pm_write/sili_pm_set_feature dereference unchecked sili_ata_get_xfer() NULL - kernel panic when PM register access runs against an exhausted ccb pool",
  "verdict": "inconclusive",
  "impact": "none (expected: kernel panic on SiI3124/3132+PM hardware; guest has no sili HBA and QEMU does not emulate the SiL3726 PM)",
  "confidence": "likely",
  "reproduce": {
    "build": "sh build.sh   (cc -O2 -Wall -o trigger_sili_pm trigger_sili_pm.c)",
    "run": "sh run.sh      (camcontrol reset/rescan storm + dd saturation, 15s)",
    "expected": "on PM hardware with a saturated port: fault on NULL direct-map page in sili_pm_read (xa->fis->type, sili_pm.c:645) -> panic; on this guest: loop completes benignly (no sili bus)"
  },
  "kernel_refs": [
    "sys/dev/disk/sili/sili_pm.c:549-551",
    "sys/dev/disk/sili/sili_pm.c:643-645",
    "sys/dev/disk/sili/sili_pm.c:680-682",
    "sys/dev/disk/sili/sili_pm.c:584-610",
    "sys/dev/disk/sili/sili.c:2317-2337",
    "sys/dev/disk/sili/sili.c:2003-2018",
    "sys/dev/disk/sili/sili.c:529-534"
  ],
  "artifacts": [
    "README.md", "VERDICT.md", "trigger_sili_pm.c", "build.sh", "run.sh",
    "build.log", "run.log", "env.txt", "fix.diff", "manifest.json", "verdict.json"
  ]
}