[  971.899983][ T7509] gre: GRE over IPv4 demultiplexor driver
[  971.941686][ T7509] ip_gre: GRE over IPv4 tunneling driver
[  977.346776][ T7564] ip (7564) used greatest stack depth: 24240 bytes left
[ 1048.039596][ T7862] ip (7862) used greatest stack depth: 24016 bytes left