[   10.939448] ip (947) used greatest stack depth: 12288 bytes left
[  710.574562] blackhole_netdev_xmit(): Dropping skb.
[  710.574642] blackhole_netdev_xmit(): Dropping skb.
[  710.574689] blackhole_netdev_xmit(): Dropping skb.
[  710.574730] blackhole_netdev_xmit(): Dropping skb.
[ 1124.670631] blackhole_netdev_xmit(): Dropping skb.
[ 1124.670702] blackhole_netdev_xmit(): Dropping skb.
[ 1124.670734] blackhole_netdev_xmit(): Dropping skb.
[ 1124.670769] blackhole_netdev_xmit(): Dropping skb.