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Diffstat (limited to 'net/core/dev_mcast.c')
-rw-r--r--net/core/dev_mcast.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index 9e2fa39f22a..fd91569e239 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);