[    1.806148] ip (243) used greatest stack depth: 12384 bytes left
[    2.452833] ip (278) used greatest stack depth: 12368 bytes left
[    5.971656] ip (446) used greatest stack depth: 12352 bytes left
[  831.117411] blackhole_netdev_xmit(): Dropping skb.
[  831.117486] blackhole_netdev_xmit(): Dropping skb.
[  831.117533] blackhole_netdev_xmit(): Dropping skb.
[  831.117579] blackhole_netdev_xmit(): Dropping skb.
[  922.833227] blackhole_netdev_xmit(): Dropping skb.
[  922.833292] blackhole_netdev_xmit(): Dropping skb.
[  922.833327] blackhole_netdev_xmit(): Dropping skb.
[  922.833380] blackhole_netdev_xmit(): Dropping skb.
[  986.695530] blackhole_netdev_xmit(): Dropping skb.
[  986.695602] blackhole_netdev_xmit(): Dropping skb.
[  986.695648] blackhole_netdev_xmit(): Dropping skb.
[  986.695685] blackhole_netdev_xmit(): Dropping skb.
[ 1125.342015] blackhole_netdev_xmit(): Dropping skb.
[ 1125.342089] blackhole_netdev_xmit(): Dropping skb.
[ 1125.342131] blackhole_netdev_xmit(): Dropping skb.
[ 1125.342172] blackhole_netdev_xmit(): Dropping skb.