⬢ DragonFlyBSD Kernel Audit
DF-4168 / manifest.json
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{
  "finding_id": "DF-4168",
  "verdict": "reproduced",
  "impact": "leak",
  "confidence": "certain",
  "runner": "df-bsd-reviewer",
  "verified_at": "2026-10-15T21:20:00Z",
  "method": "verbatim-code rig (production bios_parser_construct + table walks byte-identical, compiled on guest, verified against guest /usr/src/sys)",
  "reproduce": {
    "build": "cd rig && sh ./build.sh /usr/src",
    "run": "cd rig && sh ./run.sh",
    "expected": "baseline: size-mismatch shows construct SUCCEED with bios_size=130560 vs 4096 allocation; oob-guard SIGSEGV reading at offset 4354 (258 bytes past the allocation) in the production firmware-info walk; oob-canary BP_RESULT_OK with crystal_frequency=46600 parsed from offset 0x1300 (768 bytes past the allocation); guard-construct SIGSEGV reading at 9474 in construct's own rom-header walk. fixed: bios_size clamped to 4096, BADBIOSTABLE, sentinel untouched, no faults on the identical image."
  },
  "kernel_refs": [
    "sys/dev/drm/amd/display/dc/bios/bios_parser2.c:1930",
    "sys/dev/drm/amd/display/dc/bios/bios_parser2.c:1942",
    "sys/dev/drm/amd/display/dc/bios/bios_parser_helper.c:40",
    "sys/dev/drm/amd/display/include/bios_parser_interface.h:33",
    "sys/dev/drm/amd/amdgpu/amdgpu_bios.c:60",
    "sys/dev/drm/amd/amdgpu/amdgpu_bios.c:135"
  ],
  "artifacts": [
    "README.md",
    "VERDICT.md",
    "rig/gen_rig.sh",
    "rig/check_verbatim.sh",
    "rig/size_slice_verbatim.h",
    "rig/size_slice_verbatim.c",
    "rig/rig_shims.h",
    "rig/size_rig.c",
    "rig/Makefile",
    "rig/build.sh",
    "rig/run.sh",
    "build.log",
    "run.log",
    "run.2.log",
    "fix_validation.log",
    "code_hashes.txt",
    "env.txt",
    "fix.diff",
    "verdict.json",
    "manifest.json"
  ]
}