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netfilter: nfnetlink_queue: reject verdict request from different portid

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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: 97d32cf944 ("netfilter: nfnetlink_queue: batch verdict support")
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-08-08 22:07:27 +08:00 committed by Pablo Neira Ayuso
parent b18bcb0019
commit 00a3101f56
1 changed files with 2 additions and 4 deletions
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6
net/netfilter/nfnetlink_queue.c
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@ -1145,10 +1145,8 @@ static int nfqnl_recv_verdict(struct net *net, struct sock *ctnl,
struct nfnl_queue_net *q = nfnl_queue_pernet(net);
int err;
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);