[    1.967225] ip (241) used greatest stack depth: 12336 bytes left
[    5.893450] ip (439) used greatest stack depth: 12216 bytes left
[  966.906284] blackhole_netdev_xmit(): Dropping skb.
[  966.906365] blackhole_netdev_xmit(): Dropping skb.
[  966.906413] blackhole_netdev_xmit(): Dropping skb.
[  966.906457] blackhole_netdev_xmit(): Dropping skb.
[ 1010.499428] blackhole_netdev_xmit(): Dropping skb.
[ 1010.499489] blackhole_netdev_xmit(): Dropping skb.
[ 1010.499525] blackhole_netdev_xmit(): Dropping skb.
[ 1010.499551] blackhole_netdev_xmit(): Dropping skb.
[ 1027.776367] blackhole_netdev_xmit(): Dropping skb.
[ 1027.776428] blackhole_netdev_xmit(): Dropping skb.
[ 1027.776462] blackhole_netdev_xmit(): Dropping skb.
[ 1027.776496] blackhole_netdev_xmit(): Dropping skb.