Comment 1 for bug 1522371

After this patch, there is still another segfault:
$ ip -f inet6 tunnel add gre2 mode ip6gre local fd00:125::1:1 remote fd00:125::1:2 dev eth1
$ ip link set gre2 type ip6gre hoplimit 32

Here is the fix:
http://patchwork.ozlabs.org/patch/552378/
This fix depends on commit https://git.kernel.org/cgit/linux/kernel/git/shemminger/iproute2.git/commit/?id=c079e121a73a