[    2.117685] ip (276) used greatest stack depth: 12320 bytes left
[   11.949738] ip (1396) used greatest stack depth: 12272 bytes left
[  672.114812] blackhole_netdev_xmit(): Dropping skb.
[  672.114867] blackhole_netdev_xmit(): Dropping skb.
[  672.114899] blackhole_netdev_xmit(): Dropping skb.
[  672.114931] blackhole_netdev_xmit(): Dropping skb.
[  737.858605] blackhole_netdev_xmit(): Dropping skb.
[  737.858661] blackhole_netdev_xmit(): Dropping skb.
[  737.858700] blackhole_netdev_xmit(): Dropping skb.
[  737.858737] blackhole_netdev_xmit(): Dropping skb.
[  831.629732] blackhole_netdev_xmit(): Dropping skb.
[  831.629787] blackhole_netdev_xmit(): Dropping skb.
[  831.629822] blackhole_netdev_xmit(): Dropping skb.
[  831.629853] blackhole_netdev_xmit(): Dropping skb.
[  846.786581] blackhole_netdev_xmit(): Dropping skb.
[  846.786636] blackhole_netdev_xmit(): Dropping skb.
[  846.786671] blackhole_netdev_xmit(): Dropping skb.
[  846.786702] blackhole_netdev_xmit(): Dropping skb.