From 6e17d45ae310758ab30623a42ad070858c9a48de Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 24 Feb 2010 22:49:15 +0000 Subject: [PATCH] net: add addr len check to dev_mc_add Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- net/core/dev_mcast.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c index 9e2fa39f22a3..fd91569e2394 100644 --- a/net/core/dev_mcast.c +++ b/net/core/dev_mcast.c @@ -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);