[ 3840.431892][T31155] gre: GRE over IPv4 demultiplexer driver
[ 3840.465803][T31155] ip_gre: GRE over IPv4 tunneling driver
[ 3862.164353][T31425] ip (31425) used greatest stack depth: 23968 bytes left
[ 3880.829237][T31649] ip6_gre: GRE over IPv6 tunneling driver