DF-2211 / verdict.json
{ "finding_id": "DF-2211", "status": "not_reproduced", "reproduced": 0, "impact": null, "confidence": "certain", "verdict": "NOT REPRODUCED (hardware/module-gated on this QEMU guest) - code-certain line-level confirmation in the read-only sys/ tree. Callers embed res in audio ELD/CTS setup (kernel-internal drm paths); the garbage byte quartet influences display audio timing metadata, it is not copied to userspace verbatim. AMD GPU hardware absent in the QEMU guest.", "exploit_chain": "no escalation path (Info-tier hardening; see VERDICT.md)", "evidence": "VERDICT.md mechanism/verdict sections; fix.diff", "kernel_refs": [ "sys/dev/drm/amd/amdgpu/amdgpu_afmt.c:90", "sys/dev/drm/amd/amdgpu/amdgpu_afmt.c:100", "sys/dev/drm/amd/amdgpu/amdgpu_afmt.c:104" ], "poc_changes": "none (source-only confirmation for this Info-tier item)", "attempts": 1, "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64", "runtime_sec": 0, "guest_dirty": 0, "build_cmd": "n/a (HW-gated; source-only confirmation)", "run_cmd": "n/a", "code_hash": "d7c0f91373c63bda67103df46e31f3692ddadfcd88358c41ee1e18271fcc6e99", "notes": "Status semantics: source-confirmed rows follow the established Info-tier batch convention (deterministic code trace of the cited path:line); HW-gated rows are not_reproduced because the required device is absent on this QEMU guest.", "recommended_fix": "Set res.clock = clock before the calculated path (one line), matching the table entries which always carry clock.", "fix_status": "not_testable", "fix_kernel_uname": null, "fix_baseline_reproduced": null, "fix_patched_reproduced": null, "fix_verdict": "fix.diff compile-validated in the batch combined kernel build (all 37 diffs of this batch applied to in-guest /usr/src; make -j6 nativekernel KERNCONF=X86_64_GENERIC, see batch build log referenced in VERDICT.md); no behavior A/B performed for this Info-tier item; behavior A/B intentionally skipped for Info tier", "fix_evidence": "batch combined kernel build log (see findings/poc/_batch41 note in VERDICT.md)" } |