net: rtnl: info leak in rtnl_fill_vfinfo()

The "vf_vlan_info" struct ends with a 2 byte struct hole so we have to memset it to ensure that no stack information is revealed to user space. Fixes: 79aab09 ('net: Update API for VF vlan protocol 802.1ad support') Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: David S. Miller <[email protected]>
akeromi · Oct 13, 2016 · 775f4f0 · 775f4f0
1 parent 7307616
commit 775f4f0
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
@@ -1144,6 +1144,8 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
 	if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
 		return 0;
 
+	memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
+
 	vf_mac.vf =
 		vf_vlan.vf =
 		vf_vlan_info.vf =