[    2.356379] ip (276) used greatest stack depth: 12320 bytes left
[  771.627730] blackhole_netdev_xmit(): Dropping skb.
[  771.627851] blackhole_netdev_xmit(): Dropping skb.
[  771.627885] blackhole_netdev_xmit(): Dropping skb.
[  771.627921] blackhole_netdev_xmit(): Dropping skb.
[  947.766183] blackhole_netdev_xmit(): Dropping skb.
[  947.766250] blackhole_netdev_xmit(): Dropping skb.
[  947.766283] blackhole_netdev_xmit(): Dropping skb.
[  947.766317] blackhole_netdev_xmit(): Dropping skb.
[ 1166.269825] blackhole_netdev_xmit(): Dropping skb.
[ 1166.269874] blackhole_netdev_xmit(): Dropping skb.
[ 1166.269904] blackhole_netdev_xmit(): Dropping skb.
[ 1166.269933] blackhole_netdev_xmit(): Dropping skb.