[ETH]: Validate address in eth_mac_addr

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

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 1387e54..12c7657 100644 (file)
--- 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;
 }