[   42.800818][  T277] ip (277) used greatest stack depth: 23520 bytes left
[ 1291.095796][ T9896] blackhole_netdev_xmit(): Dropping skb.
[ 1291.096146][ T9896] blackhole_netdev_xmit(): Dropping skb.
[ 1291.096359][ T9896] blackhole_netdev_xmit(): Dropping skb.
[ 1291.096777][ T9896] blackhole_netdev_xmit(): Dropping skb.