ipv6: check sk sk_type and protocol early in ip_mroute_set/getsockopt [Linux 3.16.72]

This Linux kernel change "ipv6: check sk sk_type and protocol early in ip_mroute_set/getsockopt" is included in the Linux 3.16.72 release. This change is authored by Xin Long <lucien.xin [at] gmail.com> on Fri Feb 24 16:29:06 2017 +0800. The commit for this change in Linux stable tree is 2b8d63b (patch) which is from upstream commit 99253eb. […]