[    2.444178] ip (276) used greatest stack depth: 12320 bytes left
[    2.664868] ip (290) used greatest stack depth: 12160 bytes left
[  761.892663] blackhole_netdev_xmit(): Dropping skb.
[  761.892746] blackhole_netdev_xmit(): Dropping skb.
[  761.892803] blackhole_netdev_xmit(): Dropping skb.
[  761.892856] blackhole_netdev_xmit(): Dropping skb.
[  818.165683] blackhole_netdev_xmit(): Dropping skb.
[  818.165758] blackhole_netdev_xmit(): Dropping skb.
[  818.165817] blackhole_netdev_xmit(): Dropping skb.
[  818.165861] blackhole_netdev_xmit(): Dropping skb.
[  918.030165] blackhole_netdev_xmit(): Dropping skb.
[  918.030228] blackhole_netdev_xmit(): Dropping skb.
[  918.030256] blackhole_netdev_xmit(): Dropping skb.
[  918.030282] blackhole_netdev_xmit(): Dropping skb.