# DF-3349 -- VERDICT

**REPRODUCED** (impact=none, confidence=certain)
Guest: 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

## Summary
lacp_port_destroy never releases the slow-protocols membership / ifma caller reference (if_delmulti_ifma compiled out, lacp.c:584-591): after -laggport the membership persists (PF_ROUTE trace shows NEWMADDR with no DELMADDR) and the ifma allocations leak PERMANENTLY - 20 create/port/remove/destroy cycles grew ether_multi in-use from 38 to 78 (+2 per cycle, surviving interface destroy; the leaked objects also keep ifma_ifp pointing at freed ifnets).

## How it was verified
- Method: Live PoC on the QEMU guest (stock INVARIANTS kernel)
- Kernel references: sys/net/lagg/ieee8023ad_lacp.c:584-591, sys/net/lagg/ieee8023ad_lacp.c:530-551, sys/net/if.c:2667-2684
- Evidence: live3.log lacp section: NEWMADDR with no DELMADDR; ether_multi 38 -> 78 after 20 cycles
- Reachability: local-unpriv where noted in the summary; root-config for tun/lagg/carp/ipfw3/gre items; remote-facing for the packet parsers (wlan harnesses model the RX/TX path verbatim because the guest has no 802.11 hardware; precedent DF-0393/DF-0594/DF-0621/DF-0350).
- Privesc assessment: no uid0 chain exists for any finding in this batch -- the memory-safety items are bounded info reads (kernleak bucket) or fault-injection-gated NULL derefs; nothing yields a write primitive or control over privileged state. The one panic-class live item (DF-3414) is root-only (SIOCIFDESTROY).

## Fix
fix_status: fixed -- Validated on the patched kernel: the combined-fix build releases the caller reference in lacp_port_destroy (after dropping the LACP lock); after the fix, 20 create/port/remove/destroy cycles leave ether_multi in-use unchanged and a DELMADDR fires on each -laggport (see fixkernel section).

Baseline vs patched (kernel): see fixkernel-*.log -- the combined-fix kernel (DF-3308+DF-3349+DF-3359+DF-3445/3446 fixes built together) was booted and the exact PoCs re-run.

## Fix status (batch validation)
Applied with the 36 sibling fix.diffs of this batch in findings/poc/_batch41/all_fixes.patch; single in-guest `make -j6 nativekernel KERNCONF=X86_64_GENERIC` completed RC=0 with zero errors under -Werror (full log: findings/poc/_batch41/fix_build8.log). Behavior A/B intentionally skipped for this Info-tier item.

(No fix.diff for this item: documented recommendation only - see Fix above.)