linux-kernel - [PATCH 3.17 121/141] netfilter: ipset: off by one in ip_set_nfnl_get

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Message-Id: <20141119205154.689365506@linuxfoundation.org>
Date:	Wed, 19 Nov 2014 12:52:24 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
	Pablo Neira Ayuso <pablo@...filter.org>
Subject: [PATCH 3.17 121/141] netfilter: ipset: off by one in ip_set_nfnl_get_byindex()

3.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 0f9f5e1b83abd2b37c67658e02a6fc9001831fa5 upstream.

The ->ip_set_list[] array is initialized in ip_set_net_init() and it
has ->ip_set_max elements so this check should be >= instead of >
otherwise we are off by one.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/netfilter/ipset/ip_set_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -635,7 +635,7 @@ ip_set_nfnl_get_byindex(struct net *net,
 	struct ip_set *set;
 	struct ip_set_net *inst = ip_set_pernet(net);
 
-	if (index > inst->ip_set_max)
+	if (index >= inst->ip_set_max)
 		return IPSET_INVALID_ID;
 
 	nfnl_lock(NFNL_SUBSYS_IPSET);


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