bonding: fix length of actor system

[ Upstream commit 414dd6fb9a1a1b59983aea7bf0f79f0085ecc5b8 ]

The attribute IFLA_BOND_AD_ACTOR_SYSTEM is sent to user space having the
length of sizeof(bond->params.ad_actor_system) which is 8 byte. This
patch aligns the length to ETH_ALEN to have the same MAC address exposed
as using sysfs.

Fixes: f87fda00b6ed2 ("bonding: prevent out of bound accesses")
Signed-off-by: Tobias Jungel <tobias.jungel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index 9697977..6b9ad86 100644 (file)
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -638,8 +638,7 @@ static int bond_fill_info(struct sk_buff *skb,
                                goto nla_put_failure;
 
                        if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
-                                   sizeof(bond->params.ad_actor_system),
-                                   &bond->params.ad_actor_system))
+                                   ETH_ALEN, &bond->params.ad_actor_system))
                                goto nla_put_failure;
                }
                if (!bond_3ad_get_active_agg_info(bond, &info)) {