vxlan: do not modify the shared tunnel info when PMTU triggers an ICMP reply

[platform/kernel/linux-starfive.git] / drivers / net / vxlan.c

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 666dd20..53dbc67 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2725,12 +2725,17 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
                        goto tx_error;
                } else if (err) {
                        if (info) {
+                               struct ip_tunnel_info *unclone;
                                struct in_addr src, dst;
 
+                               unclone = skb_tunnel_info_unclone(skb);
+                               if (unlikely(!unclone))
+                                       goto tx_error;
+
                                src = remote_ip.sin.sin_addr;
                                dst = local_ip.sin.sin_addr;
-                               info->key.u.ipv4.src = src.s_addr;
-                               info->key.u.ipv4.dst = dst.s_addr;
+                               unclone->key.u.ipv4.src = src.s_addr;
+                               unclone->key.u.ipv4.dst = dst.s_addr;
                        }
                        vxlan_encap_bypass(skb, vxlan, vxlan, vni, false);
                        dst_release(ndst);
@@ -2781,12 +2786,17 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
                        goto tx_error;
                } else if (err) {
                        if (info) {
+                               struct ip_tunnel_info *unclone;
                                struct in6_addr src, dst;
 
+                               unclone = skb_tunnel_info_unclone(skb);
+                               if (unlikely(!unclone))
+                                       goto tx_error;
+
                                src = remote_ip.sin6.sin6_addr;
                                dst = local_ip.sin6.sin6_addr;
-                               info->key.u.ipv6.src = src;
-                               info->key.u.ipv6.dst = dst;
+                               unclone->key.u.ipv6.src = src;
+                               unclone->key.u.ipv6.dst = dst;
                        }
 
                        vxlan_encap_bypass(skb, vxlan, vxlan, vni, false);