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netfilter: nfnetlink_queue: reject verdict request from different portid

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commit 00a3101f56 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: 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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Liping Zhang
2016-08-08 22:07:27 +08:00
committed by Ben Hutchings
parent 8c7c27347b
commit 11ea27d54f
1 changed files with 0 additions and 3 deletions
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net/netfilter/nfnetlink_queue.c
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@ -716,9 +716,6 @@ nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
unsigned int verdict;
struct nf_queue_entry *entry;
queue = instance_lookup(queue_num);
if (!queue)
queue = verdict_instance_lookup(queue_num, NETLINK_CB(skb).pid);
if (IS_ERR(queue))
return PTR_ERR(queue);