[    2.541588] ip (277) used greatest stack depth: 12352 bytes left
[   24.308523] ip (2372) used greatest stack depth: 12200 bytes left
[ 1148.386596] blackhole_netdev_xmit(): Dropping skb.
[ 1148.386687] blackhole_netdev_xmit(): Dropping skb.
[ 1148.386733] blackhole_netdev_xmit(): Dropping skb.
[ 1148.386772] blackhole_netdev_xmit(): Dropping skb.
[ 1224.060689] blackhole_netdev_xmit(): Dropping skb.
[ 1224.060745] blackhole_netdev_xmit(): Dropping skb.
[ 1224.060776] blackhole_netdev_xmit(): Dropping skb.
[ 1224.060803] blackhole_netdev_xmit(): Dropping skb.