[    2.759524] ip (277) used greatest stack depth: 12336 bytes left
[    8.559406] ip (648) used greatest stack depth: 12280 bytes left
[  672.728413] blackhole_netdev_xmit(): Dropping skb.
[  672.728557] blackhole_netdev_xmit(): Dropping skb.
[  672.728607] blackhole_netdev_xmit(): Dropping skb.
[  672.728656] blackhole_netdev_xmit(): Dropping skb.
[  750.520957] blackhole_netdev_xmit(): Dropping skb.
[  750.521040] blackhole_netdev_xmit(): Dropping skb.
[  750.521083] blackhole_netdev_xmit(): Dropping skb.
[  750.521129] blackhole_netdev_xmit(): Dropping skb.
[  973.163066] blackhole_netdev_xmit(): Dropping skb.
[  973.163118] blackhole_netdev_xmit(): Dropping skb.
[  973.163149] blackhole_netdev_xmit(): Dropping skb.
[  973.163182] blackhole_netdev_xmit(): Dropping skb.
[  980.902450] blackhole_netdev_xmit(): Dropping skb.
[  980.902502] blackhole_netdev_xmit(): Dropping skb.
[  980.902534] blackhole_netdev_xmit(): Dropping skb.
[  980.902567] blackhole_netdev_xmit(): Dropping skb.
[ 1054.016716] blackhole_netdev_xmit(): Dropping skb.
[ 1054.016780] blackhole_netdev_xmit(): Dropping skb.
[ 1054.016811] blackhole_netdev_xmit(): Dropping skb.
[ 1054.016844] blackhole_netdev_xmit(): Dropping skb.