[    2.382726] ip (277) used greatest stack depth: 12320 bytes left
[  719.548586] blackhole_netdev_xmit(): Dropping skb.
[  719.548659] blackhole_netdev_xmit(): Dropping skb.
[  719.548691] blackhole_netdev_xmit(): Dropping skb.
[  719.548726] blackhole_netdev_xmit(): Dropping skb.
[  842.138238] blackhole_netdev_xmit(): Dropping skb.
[  842.138299] blackhole_netdev_xmit(): Dropping skb.
[  842.138336] blackhole_netdev_xmit(): Dropping skb.
[  842.138378] blackhole_netdev_xmit(): Dropping skb.
[  915.232010] blackhole_netdev_xmit(): Dropping skb.
[  915.232089] blackhole_netdev_xmit(): Dropping skb.
[  915.232139] blackhole_netdev_xmit(): Dropping skb.
[  915.232196] blackhole_netdev_xmit(): Dropping skb.