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[3.16.y-ckt,062/254] netfilter: ipset: off by one in ip_set_nfnl_get_byindex()

Message ID 1416912004-5928-63-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Nov. 25, 2014, 10:36 a.m. UTC 
3.16.7-ckt2 -stable review patch.  If anyone has any objections, please let me know.

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

From: Dan Carpenter <dan.carpenter@oracle.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@oracle.com>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/netfilter/ipset/ip_set_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index ec8114fae50b..6582dce828b5 100644
--- 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, ip_set_id_t index)
 	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);