[NET]: Validate device addr prior to interface-up

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index ed8a3d49487d..6b2e454ae313 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -298,6 +298,14 @@ static int eth_change_mtu(struct net_device *dev, int new_mtu)
         return 0;
 }
 
+static int eth_validate_addr(struct net_device *dev)
+{
+        if (!is_valid_ether_addr(dev->dev_addr))
+                return -EINVAL;
+
+        return 0;
+}
+
 const struct header_ops eth_header_ops ____cacheline_aligned = {
         .create         = eth_header,
         .parse          = eth_header_parse,
@@ -317,6 +325,7 @@ void ether_setup(struct net_device *dev)
 
         dev->change_mtu         = eth_change_mtu;
         dev->set_mac_address    = eth_mac_addr;
+        dev->validate_addr      = eth_validate_addr;
 
         dev->type               = ARPHRD_ETHER;
         dev->hard_header_len    = ETH_HLEN;