[    2.057541] ip (275) used greatest stack depth: 12320 bytes left
[    5.677529] ip (663) used greatest stack depth: 12160 bytes left
[  644.075881] blackhole_netdev_xmit(): Dropping skb.
[  644.075970] blackhole_netdev_xmit(): Dropping skb.
[  644.076037] blackhole_netdev_xmit(): Dropping skb.
[  644.076096] blackhole_netdev_xmit(): Dropping skb.
[  868.420976] blackhole_netdev_xmit(): Dropping skb.
[  868.421037] blackhole_netdev_xmit(): Dropping skb.
[  868.421072] blackhole_netdev_xmit(): Dropping skb.
[  868.421109] blackhole_netdev_xmit(): Dropping skb.
[  967.861148] blackhole_netdev_xmit(): Dropping skb.
[  967.861215] blackhole_netdev_xmit(): Dropping skb.
[  967.861249] blackhole_netdev_xmit(): Dropping skb.
[  967.861287] blackhole_netdev_xmit(): Dropping skb.