netdev - [patch] ipvs: info leak in __ip_vs_get_dest

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Message-ID: <20130603090049.GA16171@debian>
Date:	Mon, 3 Jun 2013 12:00:49 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Wensong Zhang <wensong@...ux-vs.org>
Cc:	Simon Horman <horms@...ge.net.au>, Julian Anastasov <ja@....bg>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	lvs-devel@...r.kernel.org, netfilter-devel@...r.kernel.org,
	netfilter@...r.kernel.org, coreteam@...filter.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] ipvs: info leak in __ip_vs_get_dest_entries()

The entry struct has a 2 byte hole after ->port and another 4 byte
hole after ->stats.outpkts.  You must have CAP_NET_ADMIN in your
namespace to hit this information leak.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index df05c1c..e336535 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2542,6 +2542,7 @@ __ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
 		struct ip_vs_dest *dest;
 		struct ip_vs_dest_entry entry;
 
+		memset(&entry, 0, sizeof(entry));
 		list_for_each_entry(dest, &svc->destinations, n_list) {
 			if (count >= get->num_dests)
 				break;
--
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