[    5.694792] ip (455) used greatest stack depth: 12160 bytes left
[   13.272947] ip (1186) used greatest stack depth: 12128 bytes left
[ 1068.796827] blackhole_netdev_xmit(): Dropping skb.
[ 1068.796907] blackhole_netdev_xmit(): Dropping skb.
[ 1068.796945] blackhole_netdev_xmit(): Dropping skb.
[ 1068.796975] blackhole_netdev_xmit(): Dropping skb.
[ 1112.095118] blackhole_netdev_xmit(): Dropping skb.
[ 1112.095177] blackhole_netdev_xmit(): Dropping skb.
[ 1112.095215] blackhole_netdev_xmit(): Dropping skb.
[ 1112.095253] blackhole_netdev_xmit(): Dropping skb.
[ 1159.369406] blackhole_netdev_xmit(): Dropping skb.
[ 1159.369463] blackhole_netdev_xmit(): Dropping skb.
[ 1159.369499] blackhole_netdev_xmit(): Dropping skb.
[ 1159.369535] blackhole_netdev_xmit(): Dropping skb.
[ 1215.351389] blackhole_netdev_xmit(): Dropping skb.
[ 1215.351447] blackhole_netdev_xmit(): Dropping skb.
[ 1215.351482] blackhole_netdev_xmit(): Dropping skb.
[ 1215.351522] blackhole_netdev_xmit(): Dropping skb.