[    2.050024] ip (242) used greatest stack depth: 12376 bytes left
[    2.782108] ip (276) used greatest stack depth: 12344 bytes left
[  833.924495] blackhole_netdev_xmit(): Dropping skb.
[  833.924557] blackhole_netdev_xmit(): Dropping skb.
[  833.924590] blackhole_netdev_xmit(): Dropping skb.
[  833.924618] blackhole_netdev_xmit(): Dropping skb.
[ 1152.375517] blackhole_netdev_xmit(): Dropping skb.
[ 1152.375587] blackhole_netdev_xmit(): Dropping skb.
[ 1152.375621] blackhole_netdev_xmit(): Dropping skb.
[ 1152.375664] blackhole_netdev_xmit(): Dropping skb.