[    1.866932] ip (246) used greatest stack depth: 12328 bytes left
[  758.383226] blackhole_netdev_xmit(): Dropping skb.
[  758.383291] blackhole_netdev_xmit(): Dropping skb.
[  758.383324] blackhole_netdev_xmit(): Dropping skb.
[  758.383353] blackhole_netdev_xmit(): Dropping skb.
[  823.397888] blackhole_netdev_xmit(): Dropping skb.
[  823.397946] blackhole_netdev_xmit(): Dropping skb.
[  823.397977] blackhole_netdev_xmit(): Dropping skb.
[  823.398022] blackhole_netdev_xmit(): Dropping skb.
[ 1129.177223] blackhole_netdev_xmit(): Dropping skb.
[ 1129.177290] blackhole_netdev_xmit(): Dropping skb.
[ 1129.177321] blackhole_netdev_xmit(): Dropping skb.
[ 1129.177353] blackhole_netdev_xmit(): Dropping skb.