net: add addr len check to dev_mc_add
Jiri Pirko [Wed, 24 Feb 2010 22:49:15 +0000 (22:49 +0000)]
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev_mcast.c

index 9e2fa39..fd91569 100644 (file)
@@ -96,6 +96,8 @@ int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)
        int err;
 
        netif_addr_lock_bh(dev);
+       if (alen != dev->addr_len)
+               return -EINVAL;
        err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl);
        if (!err)
                __dev_set_rx_mode(dev);