[ 3649.949054][T14618] gre: GRE over IPv4 demultiplexer driver
[ 3649.966541][T14618] ip_gre: GRE over IPv4 tunneling driver
[ 3676.156377][T14948] ip (14948) used greatest stack depth: 23696 bytes left
[ 3690.063481][T15112] ip6_gre: GRE over IPv6 tunneling driver