netdev - Re: [Patch nf] ipvs: initialize tbl->entries after allocation

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Message-ID: <alpine.LFD.2.20.1804240815120.2470@ja.home.ssi.bg>
Date:   Tue, 24 Apr 2018 08:16:14 +0300 (EEST)
From:   Julian Anastasov <ja@....bg>
To:     Cong Wang <xiyou.wangcong@...il.com>
cc:     netdev@...r.kernel.org, lvs-devel@...r.kernel.org,
        netfilter-devel@...r.kernel.org, Simon Horman <horms@...ge.net.au>,
        Pablo Neira Ayuso <pablo@...filter.org>
Subject: Re: [Patch nf] ipvs: initialize tbl->entries after allocation


	Hello,

On Mon, 23 Apr 2018, Cong Wang wrote:

> 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>

	Thanks!

Acked-by: Julian Anastasov <ja@....bg>

> ---
>  net/netfilter/ipvs/ip_vs_lblcr.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
> index 92adc04557ed..bc2bc5eebcb8 100644
> --- 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 ip_vs_service *svc)
>  	tbl->counter = 1;
>  	tbl->dead = false;
>  	tbl->svc = svc;
> +	atomic_set(&tbl->entries, 0);
>  
>  	/*
>  	 *    Hook periodic timer for garbage collection
> -- 
> 2.13.0

Regards

--
Julian Anastasov <ja@....bg>