[    2.158721] ip (275) used greatest stack depth: 12032 bytes left
[  689.051642] blackhole_netdev_xmit(): Dropping skb.
[  689.051707] blackhole_netdev_xmit(): Dropping skb.
[  689.051751] blackhole_netdev_xmit(): Dropping skb.
[  689.051814] blackhole_netdev_xmit(): Dropping skb.
[  824.332549] blackhole_netdev_xmit(): Dropping skb.
[  824.332611] blackhole_netdev_xmit(): Dropping skb.
[  824.332642] blackhole_netdev_xmit(): Dropping skb.
[  824.332669] blackhole_netdev_xmit(): Dropping skb.
[ 1022.776076] blackhole_netdev_xmit(): Dropping skb.
[ 1022.776138] blackhole_netdev_xmit(): Dropping skb.
[ 1022.776168] blackhole_netdev_xmit(): Dropping skb.
[ 1022.776202] blackhole_netdev_xmit(): Dropping skb.
[ 1172.440288] blackhole_netdev_xmit(): Dropping skb.
[ 1172.440342] blackhole_netdev_xmit(): Dropping skb.
[ 1172.440381] blackhole_netdev_xmit(): Dropping skb.
[ 1172.440419] blackhole_netdev_xmit(): Dropping skb.