{
  "finding_id": "DF-5623",
  "title": "Unbounded FID/VID pending-bit spin and non-converging phase-2 ramp loop, success returned without completion verification (AMD-0F shim)",
  "verdict": "not_reproduced",
  "reproduced": false,
  "impact": "none_on_this_guest (class: permanent CPU wedge / hard hang on non-converging K8 FID/VID hardware)",
  "confidence": "likely",
  "reproduce": {
    "build": "cd findings/poc/DF-5623 && ./build.sh   (KLD 'pstprobe' introspection harness; -Werror)",
    "run": "./run.sh   (kldload + dmesg)",
    "expected": "Live proof that the amd0f path is gated OFF on this guest (vendor=Intel, APMI edx=0, acpi_pst_md_probe()=NULL) while its symbols sit in the running GENERIC kernel. The hang itself requires AMD family-0F hardware whose FID/VID transitions never complete; see README.md."
  },
  "kernel_refs": [
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:53-56",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:102",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:112",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:126-142",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:146",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:157",
    "sys/platform/pc64/x86_64/cpufreq_machdep.c:161",
    "sys/dev/acpica/acpi_cpu_pstate.c:994-996",
    "sys/dev/acpica/acpi_cpu_pstate.c:1452-1465"
  ],
  "artifacts": [
    "README.md", "VERDICT.md", "pstprobe.c", "Makefile", "build.sh", "run.sh",
    "build.log", "run.log", "env.txt", "fix.diff", "fixbuild.log",
    "manifest.json", "verdict.json"
  ]
}