Commit f80f14c3 authored Oct 07, 2018 by David Ahern Committed by David S. Miller Oct 08, 2018

net/namespace: Update rtnl_net_dumpid for strict data checking



Update rtnl_net_dumpid for strict data checking. If the flag is set,
the dump request is expected to have an rtgenmsg struct as the header
which has the family as the only element. No data may be appended.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9632d47f

net/core/net_namespace.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -853,6 +853,12 @@ static int rtnl_net_dumpid(struct sk_buff skb, struct netlink_callback cb)
		.s_idx = cb->args[0],
		};

		if (cb->strict_check &&
		nlmsg_attrlen(cb->nlh, sizeof(struct rtgenmsg))) {
		NL_SET_ERR_MSG(cb->extack, "Unknown data in network namespace id dump request");
		return -EINVAL;
		}

		spin_lock_bh(&net->nsid_lock);
		idr_for_each(&net->netns_ids, rtnl_net_dumpid_one, &net_cb);
		spin_unlock_bh(&net->nsid_lock);