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-rw-r--r--net/ipv4/ip_tunnel_core.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 9d847c302551..0f227db0e9ac 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -73,9 +73,11 @@ void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
skb_dst_set(skb, &rt->dst);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
- if (skb_iif && proto == IPPROTO_UDP) {
- /* Arrived from an ingress interface and got udp encapuslated.
- * The encapsulated network segment length may exceed dst mtu.
+ if (skb_iif && !(df & htons(IP_DF))) {
+ /* Arrived from an ingress interface, got encapsulated, with
+ * fragmentation of encapulating frames allowed.
+ * If skb is gso, the resulting encapsulated network segments
+ * may exceed dst mtu.
* Allow IP Fragmentation of segments.
*/
IPCB(skb)->flags |= IPSKB_FRAG_SEGS;