DragonFlyBSD

for i in `seq 1 100`;
do
ifconfig lagg0 create
ifconfig lagg0 destroy
done

the shell ahove helps to trigger create and destroy lagg interface mutiple times.

it is potential that the below line will cause problem.
line 454 if_lagg.c lagg_clone_destroy()
kfree(sc, M_DEVBUF);