[ 5443.088309][T24540] gre: GRE over IPv4 demultiplexer driver
[ 5443.123408][T24540] ip_gre: GRE over IPv4 tunneling driver
[ 5444.992495][T24567] ip (24567) used greatest stack depth: 23616 bytes left
[ 5484.762219][T25034] ip6_gre: GRE over IPv6 tunneling driver