netdev - [patch] ipvs: freeing uninitialized pointer on error

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Message-ID: <20130125154456.GB5908@elgon.mountain>
Date:	Fri, 25 Jan 2013 18:44:57 +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>,
	"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: freeing uninitialized pointer on error

If state != IP_VS_STATE_BACKUP then tinfo->buf is uninitialized.  If
kthread_run() fails then it means we free random memory resulting in an
oops.

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

diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index effa10c..44fd10c 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1795,6 +1795,8 @@ int start_sync_thread(struct net *net, int state, char *mcast_ifn, __u8 syncid)
 					     GFP_KERNEL);
 			if (!tinfo->buf)
 				goto outtinfo;
+		} else {
+			tinfo->buf = NULL;
 		}
 		tinfo->id = id;
 
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