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-rw-r--r--net/ethernet/eth.c3
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;
}