[    1.689359] ip (243) used greatest stack depth: 12352 bytes left
[    2.161713] ip (277) used greatest stack depth: 12320 bytes left
[   12.234743] ip (1359) used greatest stack depth: 12304 bytes left
[  624.646037] ip (14892) used greatest stack depth: 12048 bytes left
[  967.946133] blackhole_netdev_xmit(): Dropping skb.
[  967.946192] blackhole_netdev_xmit(): Dropping skb.
[  967.946222] blackhole_netdev_xmit(): Dropping skb.
[  967.946248] blackhole_netdev_xmit(): Dropping skb.
[ 1006.626479] blackhole_netdev_xmit(): Dropping skb.
[ 1006.626556] blackhole_netdev_xmit(): Dropping skb.
[ 1006.626598] blackhole_netdev_xmit(): Dropping skb.
[ 1006.626647] blackhole_netdev_xmit(): Dropping skb.
[ 1026.788310] blackhole_netdev_xmit(): Dropping skb.
[ 1026.788375] blackhole_netdev_xmit(): Dropping skb.
[ 1026.788415] blackhole_netdev_xmit(): Dropping skb.
[ 1026.788457] blackhole_netdev_xmit(): Dropping skb.
[ 1036.040483] blackhole_netdev_xmit(): Dropping skb.
[ 1036.040537] blackhole_netdev_xmit(): Dropping skb.
[ 1036.040566] blackhole_netdev_xmit(): Dropping skb.
[ 1036.040598] blackhole_netdev_xmit(): Dropping skb.
[ 1205.071547] blackhole_netdev_xmit(): Dropping skb.
[ 1205.071599] blackhole_netdev_xmit(): Dropping skb.
[ 1205.071631] blackhole_netdev_xmit(): Dropping skb.
[ 1205.071664] blackhole_netdev_xmit(): Dropping skb.