stress: 3x baseline-tail (stock subr_mchain.c)
stress-run 0: before=32 after=39 delta=7
stress-run 1: before=39 after=47 delta=8
stress-run 2: before=47 after=55 delta=8
stress: 3x fixed-tail (patched subr_mchain.c: md_done frees whole record list)
stress-run 0: before=55 after=55 delta=0
stress-run 1: before=55 after=55 delta=0
stress-run 2: before=55 after=55 delta=0
netstat -m after all runs:
55/146632 mbufs in use (current/max):
256/33296 mbuf clusters in use (current/max):
0/8260 mbuf jumbo clusters in use (current/max):
(baseline system before any test: 7/146632 mbufs in use — 48 mbufs leaked by the
 6 vulnerable-mode module loads; zero leaked by fixed-mode loads)