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-rw-r--r--net/ipv6/sit.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 07e21a82ce4c..b2109b74857d 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -669,6 +669,10 @@ static int ipip6_rcv(struct sk_buff *skb)
!net_eq(tunnel->net, dev_net(tunnel->dev))))
goto out;
+ /* skb can be uncloned in iptunnel_pull_header, so
+ * old iph is no longer valid
+ */
+ iph = (const struct iphdr *)skb_mac_header(skb);
err = IP_ECN_decapsulate(iph, skb);
if (unlikely(err)) {
if (log_ecn_error)