{
  "finding_id": "DF-4695",
  "title": "sili_pm_softreset: 'error = EBUSY' on unexpected device-signature change is dead-stored by the unconditional 'error = 0' - signature-change never propagates, probe proceeds with stale at_type",
  "verdict": "inconclusive",
  "impact": "none (pure logic defect proven from source: dead store at sili_pm.c:495 clobbered at :498; ahci twin at ahci_pm.c:853-856; runtime needs PM hardware absent from guest)",
  "confidence": "certain",
  "reproduce": {
    "build": "sh build.sh   (cc -O2 -Wall -o trigger_sili_pm trigger_sili_pm.c)",
    "run": "sh run.sh      (documents the hardware gate)",
    "expected": "source inspection: error==EBUSY can never reach 'err:' because sili_pm.c:498 overwrites it; on PM hardware a device swap behind the PM during softreset would return success with stale at_type"
  },
  "kernel_refs": [
    "sys/dev/disk/sili/sili_pm.c:489-498",
    "sys/dev/disk/sili/sili_pm.c:515",
    "sys/dev/disk/sili/sili_cam.c:904-915",
    "sys/dev/disk/ahci/ahci_pm.c:849-856"
  ],
  "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"
  ]
}