[    2.395256] ip (275) used greatest stack depth: 12344 bytes left
[  741.101502] blackhole_netdev_xmit(): Dropping skb.
[  741.101682] blackhole_netdev_xmit(): Dropping skb.
[  741.101727] blackhole_netdev_xmit(): Dropping skb.
[  741.101801] blackhole_netdev_xmit(): Dropping skb.
[  794.466433] blackhole_netdev_xmit(): Dropping skb.
[  794.466512] blackhole_netdev_xmit(): Dropping skb.
[  794.466566] blackhole_netdev_xmit(): Dropping skb.
[  794.466620] blackhole_netdev_xmit(): Dropping skb.