[    2.498415] ip (274) used greatest stack depth: 12344 bytes left
[  709.442477] blackhole_netdev_xmit(): Dropping skb.
[  709.442538] blackhole_netdev_xmit(): Dropping skb.
[  709.442570] blackhole_netdev_xmit(): Dropping skb.
[  709.442597] blackhole_netdev_xmit(): Dropping skb.
[  973.801822] blackhole_netdev_xmit(): Dropping skb.
[  973.801924] blackhole_netdev_xmit(): Dropping skb.
[  973.801992] blackhole_netdev_xmit(): Dropping skb.
[  973.802057] blackhole_netdev_xmit(): Dropping skb.
[  993.278504] blackhole_netdev_xmit(): Dropping skb.
[  993.278580] blackhole_netdev_xmit(): Dropping skb.
[  993.278628] blackhole_netdev_xmit(): Dropping skb.
[  993.278674] blackhole_netdev_xmit(): Dropping skb.