[    2.867254] ip (277) used greatest stack depth: 12352 bytes left
[    2.916846] ip (281) used greatest stack depth: 12336 bytes left
[   22.790539] ip (2188) used greatest stack depth: 12320 bytes left
[  737.700702] blackhole_netdev_xmit(): Dropping skb.
[  737.700760] blackhole_netdev_xmit(): Dropping skb.
[  737.700792] blackhole_netdev_xmit(): Dropping skb.
[  737.700827] blackhole_netdev_xmit(): Dropping skb.
[  744.634705] blackhole_netdev_xmit(): Dropping skb.
[  744.634763] blackhole_netdev_xmit(): Dropping skb.
[  744.634793] blackhole_netdev_xmit(): Dropping skb.
[  744.634819] blackhole_netdev_xmit(): Dropping skb.
[ 1250.470044] blackhole_netdev_xmit(): Dropping skb.
[ 1250.470122] blackhole_netdev_xmit(): Dropping skb.
[ 1250.470155] blackhole_netdev_xmit(): Dropping skb.
[ 1250.470187] blackhole_netdev_xmit(): Dropping skb.