DF-5847 run log — FIXED kernel (tri-fix build #2: Mon Oct 26 06:04:19 UTC
2026 = DF-5847 serialize+tombstone+defer-free + DF-5846 + DF-5848 fixes)

Full mix, 600 s:
  sysctl net.inet6.ip6.dad_count=0
  6x flooder (maxx) + 1x stretch (maxx) + cycler vltime=0 (root)
  cycler cycles=3573/s ... DONE addok=1749470 delok=1749470
  ndp -an entries before: 3   after: 3   (no llinfo leak: the deferred
      free drain works; ~10.5M per-CPU ln alloc/unlink pairs cycled)
  dmesg panics/asserts: 0
  -> guest healthy throughout

Build: make -j6 nativekernel KERNCONF=X86_64_GENERIC RC=0, zero errors
under -Werror (fixbuild2.log summary: nd6.c recompiled clean).