[    1.870134] ip (246) used greatest stack depth: 12352 bytes left
[    2.316361] ip (277) used greatest stack depth: 12320 bytes left
[   13.391304] ip (1401) used greatest stack depth: 12128 bytes left
[  701.195528] blackhole_netdev_xmit(): Dropping skb.
[  701.195595] blackhole_netdev_xmit(): Dropping skb.
[  701.195635] blackhole_netdev_xmit(): Dropping skb.
[  701.195673] blackhole_netdev_xmit(): Dropping skb.
[  765.907753] blackhole_netdev_xmit(): Dropping skb.
[  765.907832] blackhole_netdev_xmit(): Dropping skb.
[  765.907880] blackhole_netdev_xmit(): Dropping skb.
[  765.907937] blackhole_netdev_xmit(): Dropping skb.
[  867.474335] blackhole_netdev_xmit(): Dropping skb.
[  867.474399] blackhole_netdev_xmit(): Dropping skb.
[  867.474434] blackhole_netdev_xmit(): Dropping skb.
[  867.474471] blackhole_netdev_xmit(): Dropping skb.
[  976.086596] blackhole_netdev_xmit(): Dropping skb.
[  976.086667] blackhole_netdev_xmit(): Dropping skb.
[  976.086707] blackhole_netdev_xmit(): Dropping skb.
[  976.086754] blackhole_netdev_xmit(): Dropping skb.
[ 1037.979444] blackhole_netdev_xmit(): Dropping skb.
[ 1037.979494] blackhole_netdev_xmit(): Dropping skb.
[ 1037.979526] blackhole_netdev_xmit(): Dropping skb.
[ 1037.979558] blackhole_netdev_xmit(): Dropping skb.