[  250.434812][ T1971] gre: GRE over IPv4 demultiplexor driver
[  250.485758][ T1971] ip6_gre: GRE over IPv6 tunneling driver
[  250.835553][ T1977] ip (1977) used greatest stack depth: 23392 bytes left
[  273.211403][ T2116] ip (2116) used greatest stack depth: 22984 bytes left