diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index e9b816e..cd300aa 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -676,6 +676,7 @@
 				}
 				t = netdev_priv(dev);
 				ipip_tunnel_unlink(ipn, t);
+				synchronize_net();
 				t->parms.iph.saddr = p.iph.saddr;
 				t->parms.iph.daddr = p.iph.daddr;
 				memcpy(dev->dev_addr, &p.iph.saddr, 4);