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-rw-r--r--net/ipv4/ip_input.c5
-rw-r--r--net/ipv4/tcp_ipv4.c9
2 files changed, 6 insertions, 8 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 4ebc6fe..93134b0 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -326,8 +326,11 @@ static int ip_rcv_finish(struct sk_buff *skb)
rcu_read_lock();
ipprot = rcu_dereference(inet_protos[protocol]);
- if (ipprot && ipprot->early_demux)
+ if (ipprot && ipprot->early_demux) {
ipprot->early_demux(skb);
+ /* must reload iph, skb->head might have changed */
+ iph = ip_hdr(skb);
+ }
rcu_read_unlock();
}
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3e30548..b6b07c9 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1686,7 +1686,6 @@ void tcp_v4_early_demux(struct sk_buff *skb)
struct net *net = dev_net(skb->dev);
const struct iphdr *iph;
const struct tcphdr *th;
- struct net_device *dev;
struct sock *sk;
if (skb->pkt_type != PACKET_HOST)
@@ -1701,14 +1700,10 @@ void tcp_v4_early_demux(struct sk_buff *skb)
if (th->doff < sizeof(struct tcphdr) / 4)
return;
- if (!pskb_may_pull(skb, ip_hdrlen(skb) + th->doff * 4))
- return;
-
- dev = skb->dev;
sk = __inet_lookup_established(net, &tcp_hashinfo,
iph->saddr, th->source,
iph->daddr, ntohs(th->dest),
- dev->ifindex);
+ skb->skb_iif);
if (sk) {
skb->sk = sk;
skb->destructor = sock_edemux;
@@ -1718,7 +1713,7 @@ void tcp_v4_early_demux(struct sk_buff *skb)
if (dst)
dst = dst_check(dst, 0);
if (dst &&
- icsk->rx_dst_ifindex == dev->ifindex)
+ icsk->rx_dst_ifindex == skb->skb_iif)
skb_dst_set_noref(skb, dst);
}
}
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