case SIOCSIFHWADDR:
{
/* try to set the actual net device's hw address */
- int ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
+ int ret;
+
+ rtnl_lock();
+ ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr);
+ rtnl_unlock();
if (ret == 0) {
/** Set the character device's hardware address. This is used when