Commit 89e41309 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: do not use ipv6 header for ipv4 flow 



When a dual stack tcp listener accepts an ipv4 flow,
it should not attempt to use an ipv6 header or tcp_v6_iif() helper.

Fixes: 1397ed35 ("ipv6: add flowinfo for tcp6 pkt_options for all cases")
Fixes: df3687ff ("ipv6: add the IPV6_FL_F_REFLECT flag to IPV6_FL_A_GET")
Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d7737d42

net/ipv6/tcp_ipv6.c

+4 −4
Original line number Diff line number Diff line
@@ -1110,11 +1110,11 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff * 
		newnp->ipv6_fl_list = NULL;

		newnp->pktoptions  = NULL;

		newnp->opt	   = NULL;

		newnp->mcast_oif   = tcp_v6_iif(skb);

		newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;

		newnp->rcv_flowinfo = ip6_flowinfo(ipv6_hdr(skb));

		newnp->mcast_oif   = inet_iif(skb);

		newnp->mcast_hops  = ip_hdr(skb)->ttl;

		newnp->rcv_flowinfo = 0;

		if (np->repflow)

			newnp->flow_label = ip6_flowlabel(ipv6_hdr(skb));

			newnp->flow_label = 0;



		/*

		 * No need to charge this sock to the relevant IPv6 refcnt debug socks count

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