[ETH]: Validate address in eth_mac_addr

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 1387e5411f77..12c765715acf 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -266,8 +266,11 @@ void eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
 static int eth_mac_addr(struct net_device *dev, void *p)
 {
         struct sockaddr *addr = p;
+
         if (netif_running(dev))
                 return -EBUSY;
+        if (!is_valid_ether_addr(addr->sa_data))
+                return -EADDRNOTAVAIL;
         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
         return 0;
 }