[    1.773518] ip (241) used greatest stack depth: 12352 bytes left
[    2.325124] ip (275) used greatest stack depth: 12320 bytes left
[  631.564644] ip (25892) used greatest stack depth: 12160 bytes left
[  875.349790] blackhole_netdev_xmit(): Dropping skb.
[  875.349861] blackhole_netdev_xmit(): Dropping skb.
[  875.349904] blackhole_netdev_xmit(): Dropping skb.
[  875.349957] blackhole_netdev_xmit(): Dropping skb.
[  956.803491] blackhole_netdev_xmit(): Dropping skb.
[  956.803573] blackhole_netdev_xmit(): Dropping skb.
[  956.803627] blackhole_netdev_xmit(): Dropping skb.
[  956.803677] blackhole_netdev_xmit(): Dropping skb.
[ 1114.473457] blackhole_netdev_xmit(): Dropping skb.
[ 1114.473516] blackhole_netdev_xmit(): Dropping skb.
[ 1114.473549] blackhole_netdev_xmit(): Dropping skb.
[ 1114.473582] blackhole_netdev_xmit(): Dropping skb.