ipv4: fix TCP early demux

commit 92101b3b2e317 (ipv4: Prepare for change of rt->rt_iif encoding.)
invalidated TCP early demux, because rx_dst_ifindex is not properly
initialized and checked.

Also remove the use of inet_iif(skb) in favor or skb->skb_iif

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 3e07a64ca44e..aa659e825054 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5603,6 +5603,7 @@ void tcp_finish_connect(struct sock *sk, struct sk_buff *skb)
 
         if (skb != NULL) {
                 sk->sk_rx_dst = dst_clone(skb_dst(skb));
+                inet_sk(sk)->rx_dst_ifindex = skb->skb_iif;
                 security_inet_conn_established(sk, skb);
         }