[    2.000925] ip (247) used greatest stack depth: 12328 bytes left
[   14.307003] ip (1187) used greatest stack depth: 12312 bytes left
[ 1003.672021] blackhole_netdev_xmit(): Dropping skb.
[ 1003.672192] blackhole_netdev_xmit(): Dropping skb.
[ 1003.672239] blackhole_netdev_xmit(): Dropping skb.
[ 1003.672283] blackhole_netdev_xmit(): Dropping skb.