⬢ DragonFlyBSD Kernel Audit
DF-5222 / manifest.json
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{
  "finding_id": "DF-5222",
  "file": "sys/dev/drm/drm_memory.c",
  "verdict": "untested",
  "impact": "none",
  "severity": "Info",
  "confidence": "certain",
  "poc_intentionally_skipped": true,
  "skip_reason": "Info hardening finding; zero in-tree callers; only reachable by root-loaded kmods. Contract exempts Low/Info from PoC execution.",
  "reproduce": {
    "build": "n/a (no PoC built — conceptual kld proof described in README.md)",
    "run": "n/a",
    "expected": "A kmod pairing drm_legacy_ioremap()+drm_legacy_ioremapfree() would leave its struct iomap entry in iomap_list forever (linux_iomapping.c:55 insert; removal only at linux_iomapping.c:99 in iounmap) and skip PAT restore (linux_iomapping.c:88-91)."
  },
  "kernel_refs": [
    "sys/dev/drm/drm_memory.c:64-68",
    "sys/dev/drm/drm_memory.c:70-74",
    "sys/dev/drm/drm_memory.c:76-83",
    "sys/dev/drm/linux_iomapping.c:41-59",
    "sys/dev/drm/linux_iomapping.c:61-103",
    "sys/dev/drm/include/drm/drm_legacy.h:191-193",
    "sys/dev/drm/drm_bufs.c:219-222",
    "sys/dev/drm/drm_bufs.c:524",
    "sys/dev/drm/drm_ioctl.c:590",
    "sys/dev/drm/include/asm/io.h:129-132",
    "sys/dev/drm/include/asm/io.h:146",
    "sys/platform/pc64/x86_64/pmap.c:6223-6232"
  ],
  "artifacts": [
    "README.md",
    "VERDICT.md",
    "fix.diff",
    "manifest.json",
    "verdict.json"
  ]
}