[NETNS]: Add missing initialization of nl_info.nl_net in rtm_to_fib6_config()

Add missing initialization of the new nl_info.nl_net field in
rtm_to_fib6_config(). This will be needed the store network namespace
associated to the fib6_config struct.
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/route.c

@@ -1960,6 +1960,7 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 	cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
 	cfg->fc_nlinfo.nlh = nlh;
+	cfg->fc_nlinfo.nl_net = skb->sk->sk_net;
 
 	if (tb[RTA_GATEWAY]) {
 		nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16);