[    1.681782] ip (245) used greatest stack depth: 12304 bytes left
[   16.151971] ip (2135) used greatest stack depth: 12160 bytes left
[  850.281878] blackhole_netdev_xmit(): Dropping skb.
[  850.281961] blackhole_netdev_xmit(): Dropping skb.
[  850.281997] blackhole_netdev_xmit(): Dropping skb.
[  850.282039] blackhole_netdev_xmit(): Dropping skb.
[ 1067.091199] blackhole_netdev_xmit(): Dropping skb.
[ 1067.091277] blackhole_netdev_xmit(): Dropping skb.
[ 1067.091326] blackhole_netdev_xmit(): Dropping skb.
[ 1067.091370] blackhole_netdev_xmit(): Dropping skb.
[ 1072.770215] blackhole_netdev_xmit(): Dropping skb.
[ 1072.770279] blackhole_netdev_xmit(): Dropping skb.
[ 1072.770323] blackhole_netdev_xmit(): Dropping skb.
[ 1072.770365] blackhole_netdev_xmit(): Dropping skb.