[ 18.285527][ T305] ip (305) used greatest stack depth: 24024 bytes left [ 172.830200][ T1396] mpls_gso: MPLS GSO support [ 1459.025558][T15895] blackhole_netdev_xmit(): Dropping skb. [ 1459.025986][T15895] blackhole_netdev_xmit(): Dropping skb. [ 1459.026260][T15895] blackhole_netdev_xmit(): Dropping skb. [ 1459.026511][T15895] blackhole_netdev_xmit(): Dropping skb.