[    2.332520] ip (276) used greatest stack depth: 12344 bytes left
[    4.138469] ip (404) used greatest stack depth: 12328 bytes left
[  652.998470] blackhole_netdev_xmit(): Dropping skb.
[  652.998539] blackhole_netdev_xmit(): Dropping skb.
[  652.998576] blackhole_netdev_xmit(): Dropping skb.
[  652.998616] blackhole_netdev_xmit(): Dropping skb.
[  777.727896] blackhole_netdev_xmit(): Dropping skb.
[  777.727963] blackhole_netdev_xmit(): Dropping skb.
[  777.728007] blackhole_netdev_xmit(): Dropping skb.
[  777.728046] blackhole_netdev_xmit(): Dropping skb.
[  847.102371] blackhole_netdev_xmit(): Dropping skb.
[  847.102431] blackhole_netdev_xmit(): Dropping skb.
[  847.102476] blackhole_netdev_xmit(): Dropping skb.
[  847.102517] blackhole_netdev_xmit(): Dropping skb.
[  908.451138] blackhole_netdev_xmit(): Dropping skb.
[  908.451205] blackhole_netdev_xmit(): Dropping skb.
[  908.451240] blackhole_netdev_xmit(): Dropping skb.
[  908.451276] blackhole_netdev_xmit(): Dropping skb.