=== fixed-logic validation (fresh module load) ===
vmxrep901(fixed rx): unpopulated ring selected - completion dropped, no NULL deref, guest alive
vmxrep902(fixed rxhead): derived qid 704 >= nrxqueues 1 - MMIO write suppressed, guest alive
vmxrep900(fixed tx): packets sent=2000 alloc=2000 freed=2000 LEAKED=0 (expect 0)

=== vulnerable run same boot (3780) left 1000 clusters pinned (still 1256 after fixed run) ===
7/146632 mbufs in use (current/max):
1256/33296 mbuf clusters in use (current/max)
0/8260 mbuf jumbo clusters in use (current/max)