From: ebiederm@xmission•com (Eric W. Biederman)
To: David Miller <davem@davemloft•net>
Cc: Pablo Neira Ayuso <pablo@netfilter•org>, <netdev@vger•kernel.org>,
<netfilter-devel@vger•kernel.org>,
Patrick McHardy <kaber@trash•net>
Subject: [PATCH net] netfilter: nf_queue: Don't recompute the hook_list head
Date: Fri, 19 Jun 2015 17:23:37 -0500 [thread overview]
Message-ID: <87381ne3rq.fsf@x220.int.ebiederm.org> (raw)
If someone sends packets from one of the netdevice ingress hooks to
the a userspace queue, and then userspace later accepts the packet,
the netfilter code can enter an infinite loop as the list head will
never be found.
Pass in the saved list_head to avoid this.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission•com>
---
net/netfilter/nf_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index cd60d397fe05..8a8b2abc35ff 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -213,7 +213,7 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
if (verdict == NF_ACCEPT) {
next_hook:
- verdict = nf_iterate(&nf_hooks[entry->state.pf][entry->state.hook],
+ verdict = nf_iterate(entry->state.hook_list,
skb, &entry->state, &elem);
}
--
2.2.1
--
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next reply other threads:[~2015-06-19 22:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-19 22:23 Eric W. Biederman [this message]
2015-06-20 10:58 ` [PATCH net] netfilter: nf_queue: Don't recompute the hook_list head Pablo Neira Ayuso
2015-06-20 14:08 ` Eric W. Biederman
2015-06-20 18:53 ` Pablo Neira Ayuso
2015-06-22 14:56 ` Eric W. Biederman
2015-06-23 16:17 ` Pablo Neira Ayuso
2015-06-23 16:23 ` Eric W. Biederman
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