[    2.755711] ip (276) used greatest stack depth: 12320 bytes left
[   24.965666] ip (2333) used greatest stack depth: 12304 bytes left
[  973.683968] blackhole_netdev_xmit(): Dropping skb.
[  973.684139] blackhole_netdev_xmit(): Dropping skb.
[  973.684201] blackhole_netdev_xmit(): Dropping skb.
[  973.684247] blackhole_netdev_xmit(): Dropping skb.
[ 1121.614416] blackhole_netdev_xmit(): Dropping skb.
[ 1121.614467] blackhole_netdev_xmit(): Dropping skb.
[ 1121.614497] blackhole_netdev_xmit(): Dropping skb.
[ 1121.614522] blackhole_netdev_xmit(): Dropping skb.
[ 1156.617337] blackhole_netdev_xmit(): Dropping skb.
[ 1156.617399] blackhole_netdev_xmit(): Dropping skb.
[ 1156.617444] blackhole_netdev_xmit(): Dropping skb.
[ 1156.617482] blackhole_netdev_xmit(): Dropping skb.