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>

diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index 5b05487..db11e40 100644 (file)
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -218,9 +218,6 @@ int nf_conntrack_gre_packet(struct nf_conn *ct,
                            enum ip_conntrack_info ctinfo,
                            const struct nf_hook_state *state)
 {
-       if (state->pf != NFPROTO_IPV4)
-               return -NF_ACCEPT;
-
        if (!nf_ct_is_confirmed(ct)) {
                unsigned int *timeouts = nf_ct_timeout_lookup(ct);