1 files changed, 6 insertions, 2 deletions

diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index eaad66590f10..ceedf3ef1ce2 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -112,13 +112,17 @@ static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
 {
         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
         struct sockaddr *addr = p;
+        __le64 extended_addr;
 
         if (netif_running(dev))
                 return -EBUSY;
 
-        /* FIXME: validate addr */
+        extended_addr = ieee802154_netdev_to_extended_addr(addr->sa_data);
+        if (!ieee802154_is_valid_extended_addr(extended_addr))
+                return -EINVAL;
+
         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
-        sdata->extended_addr = ieee802154_netdev_to_extended_addr(dev->dev_addr);
+        sdata->extended_addr = extended_addr;
 
         return mac802154_wpan_update_llsec(dev);
 }