netfilter: conntrack: Fix gre tunneling over ipv6

[ Upstream commit 8b2030b4305951f44afef80225f1475618e25a73 ]

This fix permits gre connections to be tracked within ip6tables rules

Signed-off-by: Ludovic Senecaux <linuxludo@free.fr>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
1 file changed