4    2 0xffffffff82600000     9000 netgraph.ko
 5    1 0xffffffff82609000     2000 ng_socket.ko
free-before: 870303
ng7 header size=56 (kernel struct ng_mesg layout)
control socket fd=3
[type=socket   ] sendto ok=0 fail=50000 (50000 iters)
[type=socket   ]   errno 22 (Invalid argument): 50000
free-afterA(loaded,EINVAL,expect-flat): 869306
ng7 header size=56 (kernel struct ng_mesg layout)
control socket fd=3
[type=df3511x  ] sendto ok=0 fail=50000 (50000 iters)
[type=df3511x  ]   errno 6 (Device not configured): 50000
free-afterB(bogus,ENXIO,expect-FLAT-now): 869202

=== mbuf.before
7/146632 mbufs in use (current/max):
257/33296 mbuf clusters in use (current/max)
=== mbuf.afterB
7/146632 mbufs in use (current/max):
256/33296 mbuf clusters in use (current/max)