[    2.145418] ip (275) used greatest stack depth: 12320 bytes left
[    6.465760] ip (651) used greatest stack depth: 12160 bytes left
[  805.384060] blackhole_netdev_xmit(): Dropping skb.
[  805.384117] blackhole_netdev_xmit(): Dropping skb.
[  805.384151] blackhole_netdev_xmit(): Dropping skb.
[  805.384183] blackhole_netdev_xmit(): Dropping skb.
[ 1150.163521] blackhole_netdev_xmit(): Dropping skb.
[ 1150.163578] blackhole_netdev_xmit(): Dropping skb.
[ 1150.163610] blackhole_netdev_xmit(): Dropping skb.
[ 1150.163637] blackhole_netdev_xmit(): Dropping skb.