Description: IPv6 mroute missing type check
References:
 https://lists.openwall.net/netdev/2017/12/04/40
 https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-inetcsklistenstop-gpf
Notes:
Bugs:
upstream: released (4.11-rc1) [99253eb750fda6a644d5188fb26c43bad8d5a745]
4.19-upstream-stable: N/A "Fixed before branch point"
4.9-upstream-stable: released (4.9.187) [1e531ad4316cb47c6c2b42f3257d1841a6e837e7]
3.16-upstream-stable: released (3.16.72) [2b8d63b97d78835d3cd75b0ee344d21489df4edc]
sid: released (4.11.6-1)
4.19-buster-security: N/A "Fixed before branch point"
4.9-stretch-security: released (4.9.168-1+deb9u5) [bugfix/all/ipv6-check-sk-sk_type-and-protocol-early-in-ip_mrout.patch]
3.16-jessie-security: released (3.16.72-1)