[PATCH 12/12] netfilter: ip6t_MASQUERADE: add dependency on conntrack module

[Pablo Neira Ayuso]

From: Konstantin Khlebnikov <khlebni...@yandex-team.ru>

After commit 4d3a57f23dec ("netfilter: conntrack: do not enable connection
tracking unless needed") conntrack is disabled by default unless some
module explicitly declares dependency in particular network namespace.

Fixes: a357b3f80bc8 ("netfilter: nat: add dependencies on conntrack module")
Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 net/ipv6/netfilter/ip6t_MASQUERADE.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/netfilter/ip6t_MASQUERADE.c 
b/net/ipv6/netfilter/ip6t_MASQUERADE.c
index 2b1a15846f9a..92c0047e7e33 100644
--- a/net/ipv6/netfilter/ip6t_MASQUERADE.c
+++ b/net/ipv6/netfilter/ip6t_MASQUERADE.c
@@ -33,13 +33,19 @@ static int masquerade_tg6_checkentry(const struct 
xt_tgchk_param *par)
 
        if (range->flags & NF_NAT_RANGE_MAP_IPS)
                return -EINVAL;
-       return 0;
+       return nf_ct_netns_get(par->net, par->family);
+}
+
+static void masquerade_tg6_destroy(const struct xt_tgdtor_param *par)
+{
+       nf_ct_netns_put(par->net, par->family);
 }
 
 static struct xt_target masquerade_tg6_reg __read_mostly = {
        .name           = "MASQUERADE",
        .family         = NFPROTO_IPV6,
        .checkentry     = masquerade_tg6_checkentry,
+       .destroy        = masquerade_tg6_destroy,
        .target         = masquerade_tg6,
        .targetsize     = sizeof(struct nf_nat_range),
        .table          = "nat",
-- 
2.11.0