[    2.078501] ip (277) used greatest stack depth: 12320 bytes left
[    6.536465] ip (754) used greatest stack depth: 12304 bytes left
[  705.846400] blackhole_netdev_xmit(): Dropping skb.
[  705.846514] blackhole_netdev_xmit(): Dropping skb.
[  705.846550] blackhole_netdev_xmit(): Dropping skb.
[  705.846592] blackhole_netdev_xmit(): Dropping skb.
[ 1136.783166] blackhole_netdev_xmit(): Dropping skb.
[ 1136.783236] blackhole_netdev_xmit(): Dropping skb.
[ 1136.783271] blackhole_netdev_xmit(): Dropping skb.
[ 1136.783303] blackhole_netdev_xmit(): Dropping skb.
[ 1183.752818] blackhole_netdev_xmit(): Dropping skb.
[ 1183.752896] blackhole_netdev_xmit(): Dropping skb.
[ 1183.752941] blackhole_netdev_xmit(): Dropping skb.
[ 1183.752988] blackhole_netdev_xmit(): Dropping skb.