Commit 23711438 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller

veth: Enforce minimum size of VETH_INFO_PEER

VETH_INFO_PEER carries struct ifinfomsg plus optional IFLA
attributes. A minimal size of sizeof(struct ifinfomsg) must be
enforced or we may risk accessing that struct beyond the limits
of the netlink message.
Signed-off-by: default avatarThomas Graf <tgraf@suug.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 78a5249f
...@@ -422,7 +422,9 @@ static void veth_dellink(struct net_device *dev, struct list_head *head) ...@@ -422,7 +422,9 @@ static void veth_dellink(struct net_device *dev, struct list_head *head)
unregister_netdevice_queue(peer, head); unregister_netdevice_queue(peer, head);
} }
static const struct nla_policy veth_policy[VETH_INFO_MAX + 1]; static const struct nla_policy veth_policy[VETH_INFO_MAX + 1] = {
[VETH_INFO_PEER] = { .len = sizeof(struct ifinfomsg) },
};
static struct rtnl_link_ops veth_link_ops = { static struct rtnl_link_ops veth_link_ops = {
.kind = DRV_NAME, .kind = DRV_NAME,
......
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