linux-kernel - [PATCH 4.17 083/101] ipvs: initialize tbl->entries after allocation

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Message-Id: <20180720121426.781183291@linuxfoundation.org>
Date:   Fri, 20 Jul 2018 14:14:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        syzbot+3dfdea57819073a04f21@...kaller.appspotmail.com,
        Simon Horman <horms@...ge.net.au>,
        Julian Anastasov <ja@....bg>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Cong Wang <xiyou.wangcong@...il.com>
Subject: [PATCH 4.17 083/101] ipvs: initialize tbl->entries after allocation

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

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

From: Cong Wang <xiyou.wangcong@...il.com>

commit 3aa1409a7b160f9444945c0df1cb079df82be84e upstream.

tbl->entries is not initialized after kmalloc(), therefore
causes an uninit-value warning in ip_vs_lblc_check_expire()
as reported by syzbot.

Reported-by: <syzbot+3dfdea57819073a04f21@...kaller.appspotmail.com>
Cc: Simon Horman <horms@...ge.net.au>
Cc: Julian Anastasov <ja@....bg>
Cc: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
Acked-by: Julian Anastasov <ja@....bg>
Acked-by: Simon Horman <horms@...ge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/netfilter/ipvs/ip_vs_lblcr.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -534,6 +534,7 @@ static int ip_vs_lblcr_init_svc(struct i
 	tbl->counter = 1;
 	tbl->dead = false;
 	tbl->svc = svc;
+	atomic_set(&tbl->entries, 0);
 
 	/*
 	 *    Hook periodic timer for garbage collection