1 files changed, 9 insertions, 4 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 0e41f1be6dc..e92ad8455c6 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2031,8 +2031,8 @@ int addrconf_set_dstaddr(struct net *net, void __user *arg)
 
 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
         if (dev->type == ARPHRD_SIT) {
+                const struct net_device_ops *ops = dev->netdev_ops;
                 struct ifreq ifr;
-                mm_segment_t    oldfs;
                 struct ip_tunnel_parm p;
 
                 err = -EADDRNOTAVAIL;
@@ -2048,9 +2048,14 @@ int addrconf_set_dstaddr(struct net *net, void __user *arg)
                 p.iph.ttl = 64;
                 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
 
-                oldfs = get_fs(); set_fs(KERNEL_DS);
-                err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
-                set_fs(oldfs);
+                if (ops->ndo_do_ioctl) {
+                        mm_segment_t oldfs = get_fs();
+
+                        set_fs(KERNEL_DS);
+                        err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
+                        set_fs(oldfs);
+                } else
+                        err = -EOPNOTSUPP;
 
                 if (err == 0) {
                         err = -ENOBUFS;