From: Jiri Pirko <jpirko@redhat.com>
Date: Wed, 24 Feb 2010 22:49:15 +0000 (+0000)
Subject: net: add addr len check to dev_mc_add
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6e17d45ae310758ab30623a42ad070858c9a48de;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

net: add addr len check to dev_mc_add

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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);