[    1.763230] ip (242) used greatest stack depth: 12352 bytes left
[    1.828372] ip (248) used greatest stack depth: 12304 bytes left
[ 1060.045244] blackhole_netdev_xmit(): Dropping skb.
[ 1060.045339] blackhole_netdev_xmit(): Dropping skb.
[ 1060.045382] blackhole_netdev_xmit(): Dropping skb.
[ 1060.045423] blackhole_netdev_xmit(): Dropping skb.
[ 1196.821702] blackhole_netdev_xmit(): Dropping skb.
[ 1196.821777] blackhole_netdev_xmit(): Dropping skb.
[ 1196.821819] blackhole_netdev_xmit(): Dropping skb.
[ 1196.821878] blackhole_netdev_xmit(): Dropping skb.