[    2.549866] ip (277) used greatest stack depth: 12360 bytes left
[    2.597631] ip (281) used greatest stack depth: 12352 bytes left
[    5.897861] ip (440) used greatest stack depth: 12344 bytes left
[   25.044905] ip (2330) used greatest stack depth: 12328 bytes left
[  792.696569] blackhole_netdev_xmit(): Dropping skb.
[  792.696636] blackhole_netdev_xmit(): Dropping skb.
[  792.696677] blackhole_netdev_xmit(): Dropping skb.
[  792.696728] blackhole_netdev_xmit(): Dropping skb.
[  835.749713] blackhole_netdev_xmit(): Dropping skb.
[  835.749771] blackhole_netdev_xmit(): Dropping skb.
[  835.749807] blackhole_netdev_xmit(): Dropping skb.
[  835.749844] blackhole_netdev_xmit(): Dropping skb.
[  853.254229] blackhole_netdev_xmit(): Dropping skb.
[  853.254295] blackhole_netdev_xmit(): Dropping skb.
[  853.254343] blackhole_netdev_xmit(): Dropping skb.
[  853.254392] blackhole_netdev_xmit(): Dropping skb.
[ 1073.318991] blackhole_netdev_xmit(): Dropping skb.
[ 1073.319056] blackhole_netdev_xmit(): Dropping skb.
[ 1073.319092] blackhole_netdev_xmit(): Dropping skb.
[ 1073.319137] blackhole_netdev_xmit(): Dropping skb.
[ 1208.655122] blackhole_netdev_xmit(): Dropping skb.
[ 1208.655173] blackhole_netdev_xmit(): Dropping skb.
[ 1208.655209] blackhole_netdev_xmit(): Dropping skb.
[ 1208.655239] blackhole_netdev_xmit(): Dropping skb.
[ 1219.609328] blackhole_netdev_xmit(): Dropping skb.
[ 1219.609376] blackhole_netdev_xmit(): Dropping skb.
[ 1219.609407] blackhole_netdev_xmit(): Dropping skb.
[ 1219.609443] blackhole_netdev_xmit(): Dropping skb.