[ 1463.456235] ip (1417) used greatest stack depth: 12304 bytes left
[ 2434.705989] blackhole_netdev_xmit(): Dropping skb.
[ 2434.706064] blackhole_netdev_xmit(): Dropping skb.
[ 2434.706097] blackhole_netdev_xmit(): Dropping skb.
[ 2434.706132] blackhole_netdev_xmit(): Dropping skb.
[ 2475.292586] blackhole_netdev_xmit(): Dropping skb.
[ 2475.292649] blackhole_netdev_xmit(): Dropping skb.
[ 2475.292692] blackhole_netdev_xmit(): Dropping skb.
[ 2475.292732] blackhole_netdev_xmit(): Dropping skb.