4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Liping Zhang <[email protected]> commit 00a3101f561816e58de054a470484996f78eb5eb upstream. Like NFQNL_MSG_VERDICT_BATCH do, we should also reject the verdict request when the portid is not same with the initial portid(maybe from another process). Fixes: 97d32cf9440d ("netfilter: nfnetlink_queue: batch verdict support") Signed-off-by: Liping Zhang <[email protected]> Reviewed-by: Florian Westphal <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> Acked-by: Michal Kubecek <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/netfilter/nfnetlink_queue.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/net/netfilter/nfnetlink_queue.c +++ b/net/netfilter/nfnetlink_queue.c @@ -1053,10 +1053,8 @@ nfqnl_recv_verdict(struct sock *ctnl, st struct net *net = sock_net(ctnl); struct nfnl_queue_net *q = nfnl_queue_pernet(net); - queue = instance_lookup(q, queue_num); - if (!queue) - queue = verdict_instance_lookup(q, queue_num, - NETLINK_CB(skb).portid); + queue = verdict_instance_lookup(q, queue_num, + NETLINK_CB(skb).portid); if (IS_ERR(queue)) return PTR_ERR(queue);
