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Diffstat (limited to 'net/ipv4/ip_input.c')
-rw-r--r--net/ipv4/ip_input.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index d6feabb03516..fa2dc8f692c6 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -313,6 +313,7 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt;
struct net_device *dev = skb->dev;
+ void (*edemux)(struct sk_buff *skb);
/* if ingress device is enslaved to an L3 master device pass the
* skb to its handler for processing
@@ -329,8 +330,8 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
int protocol = iph->protocol;
ipprot = rcu_dereference(inet_protos[protocol]);
- if (ipprot && ipprot->early_demux) {
- ipprot->early_demux(skb);
+ if (ipprot && (edemux = READ_ONCE(ipprot->early_demux))) {
+ edemux(skb);
/* must reload iph, skb->head might have changed */
iph = ip_hdr(skb);
}