4.9-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
[ Upstream commit e0aa67709f89d08c8d8e5bdd9e0b649df61d0090 ]
When a dual stack dccp listener accepts an ipv4 flow, it should not attempt to use an ipv6 header or inet6_iif() helper.
Fixes: 3df80d9320bc ("[DCCP]: Introduce DCCPv6") Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/dccp/ipv6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -431,8 +431,8 @@ static struct sock *dccp_v6_request_recv newnp->ipv6_mc_list = NULL; newnp->ipv6_ac_list = NULL; newnp->ipv6_fl_list = NULL; - newnp->mcast_oif = inet6_iif(skb); - newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; + newnp->mcast_oif = inet_iif(skb); + newnp->mcast_hops = ip_hdr(skb)->ttl;
/* * No need to charge this sock to the relevant IPv6 refcnt debug socks count