[    2.480132] ip (276) used greatest stack depth: 12336 bytes left
[   13.012108] ip (1086) used greatest stack depth: 12288 bytes left
[  968.757912] blackhole_netdev_xmit(): Dropping skb.
[  968.757996] blackhole_netdev_xmit(): Dropping skb.
[  968.758068] blackhole_netdev_xmit(): Dropping skb.
[  968.758112] blackhole_netdev_xmit(): Dropping skb.
[ 1015.939876] blackhole_netdev_xmit(): Dropping skb.
[ 1015.939933] blackhole_netdev_xmit(): Dropping skb.
[ 1015.939969] blackhole_netdev_xmit(): Dropping skb.
[ 1015.940009] blackhole_netdev_xmit(): Dropping skb.
[ 1046.391210] blackhole_netdev_xmit(): Dropping skb.
[ 1046.391261] blackhole_netdev_xmit(): Dropping skb.
[ 1046.391292] blackhole_netdev_xmit(): Dropping skb.
[ 1046.391318] blackhole_netdev_xmit(): Dropping skb.