DF-3299 / verdict.json
{ "finding_id": "DF-3299", "status": "not_reproduced", "reproduced": 0, "poc_path": "findings/poc/DF-3299", "artifact_dir": "findings/poc/DF-3299", "build_cmd": "cc -O -o <prog> <prog>.c (on the guest)", "run_cmd": "(none)", "code_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "build_log": "(inline)", "run_log": "VERDICT.md", "impact": "none", "confidence": "likely", "verdict": "carp_group_demote_adj (ip_carp.c:2765-2781) does an unlocked RMW on ifg_carp_demoted and an unlocked group walk, and carp_send_ad_all runs in the caller context; the cross-CPU callers are pfsync_input (any netisr CPU, if_pfsync.c:985) vs pfsyncioctl (user thread, :1162). The demote counter is not exposed to userspace and pfsync was not configured, so no manifestation could be driven or observed; mechanism line-confirmed only (NOTES.md folded in).", "exploit_chain": "", "evidence": "NOTES.md (prior static analysis) + ip_carp.c:2765-2781 excerpt in VERDICT.md", "kernel_refs": [ "sys/netinet/ip_carp.c:2765-2781", "sys/net/pf/if_pfsync.c:985", "sys/net/pf/if_pfsync.c:1162" ], "poc_changes": "", "attempts": 3, "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 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": 60, "guest_dirty": 0, "runner": "df-bsd-reviewer", "notes": "", "recommended_fix": "", "fix_status": "not_testable", "fix_verdict": "Fix: netisr0-dispatch carp_group_demote_adj/carp_send_ad_all + token-protected group walk; needs a pfsync rig to A/B.", "fix_baseline_reproduced": null, "fix_patched_reproduced": null } |