[    2.613264] ip (277) used greatest stack depth: 12336 bytes left
[    8.547077] ip (749) used greatest stack depth: 12320 bytes left
[  824.857566] blackhole_netdev_xmit(): Dropping skb.
[  824.857638] blackhole_netdev_xmit(): Dropping skb.
[  824.857675] blackhole_netdev_xmit(): Dropping skb.
[  824.857708] blackhole_netdev_xmit(): Dropping skb.
[  903.238843] blackhole_netdev_xmit(): Dropping skb.
[  903.238905] blackhole_netdev_xmit(): Dropping skb.
[  903.238940] blackhole_netdev_xmit(): Dropping skb.
[  903.238975] blackhole_netdev_xmit(): Dropping skb.
[ 1118.433132] blackhole_netdev_xmit(): Dropping skb.
[ 1118.433201] blackhole_netdev_xmit(): Dropping skb.
[ 1118.433242] blackhole_netdev_xmit(): Dropping skb.
[ 1118.433279] blackhole_netdev_xmit(): Dropping skb.