netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_checksum sysctl

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index e0ee89e..3d3fffe 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -123,7 +123,7 @@
 	 * We skip checking packets on the outgoing path
 	 * because the checksum is assumed to be correct.
 	 * FIXME: Source route IP option packets --RR */
-	if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
+	if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
 	    nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
 		if (LOG_INVALID(IPPROTO_UDP))
 			nf_log_packet(pf, 0, skb, NULL, NULL, NULL,