[    2.453949] ip (276) used greatest stack depth: 12336 bytes left
[ 1142.371526] blackhole_netdev_xmit(): Dropping skb.
[ 1142.371614] blackhole_netdev_xmit(): Dropping skb.
[ 1142.371669] blackhole_netdev_xmit(): Dropping skb.
[ 1142.371717] blackhole_netdev_xmit(): Dropping skb.