[    2.412684] ip (272) used greatest stack depth: 12344 bytes left
[  635.086559] ip (7803) used greatest stack depth: 12328 bytes left
[  673.655993] blackhole_netdev_xmit(): Dropping skb.
[  673.656064] blackhole_netdev_xmit(): Dropping skb.
[  673.656109] blackhole_netdev_xmit(): Dropping skb.
[  673.656147] blackhole_netdev_xmit(): Dropping skb.
[  686.196998] blackhole_netdev_xmit(): Dropping skb.
[  686.197079] blackhole_netdev_xmit(): Dropping skb.
[  686.197130] blackhole_netdev_xmit(): Dropping skb.
[  686.197179] blackhole_netdev_xmit(): Dropping skb.
[  824.051000] blackhole_netdev_xmit(): Dropping skb.
[  824.051063] blackhole_netdev_xmit(): Dropping skb.
[  824.051096] blackhole_netdev_xmit(): Dropping skb.
[  824.051129] blackhole_netdev_xmit(): Dropping skb.
[  844.681047] blackhole_netdev_xmit(): Dropping skb.
[  844.681105] blackhole_netdev_xmit(): Dropping skb.
[  844.681138] blackhole_netdev_xmit(): Dropping skb.
[  844.681174] blackhole_netdev_xmit(): Dropping skb.
[ 1005.726260] blackhole_netdev_xmit(): Dropping skb.
[ 1005.726351] blackhole_netdev_xmit(): Dropping skb.
[ 1005.726416] blackhole_netdev_xmit(): Dropping skb.
[ 1005.726495] blackhole_netdev_xmit(): Dropping skb.