[    1.875746] ip (242) used greatest stack depth: 12352 bytes left
[    2.429712] ip (276) used greatest stack depth: 12320 bytes left
[ 1196.312271] blackhole_netdev_xmit(): Dropping skb.
[ 1196.312386] blackhole_netdev_xmit(): Dropping skb.
[ 1196.312443] blackhole_netdev_xmit(): Dropping skb.
[ 1196.312484] blackhole_netdev_xmit(): Dropping skb.