[    1.712777] ip (246) used greatest stack depth: 12304 bytes left
[ 1054.416235] blackhole_netdev_xmit(): Dropping skb.
[ 1054.416339] blackhole_netdev_xmit(): Dropping skb.
[ 1054.416385] blackhole_netdev_xmit(): Dropping skb.
[ 1054.416433] blackhole_netdev_xmit(): Dropping skb.