netdev - Re: [PATCH 1/4] netfilter: ipset: fix timeout value overflow bug

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Message-ID: <1337006844.8512.491.camel@edumazet-glaptop>
Date:	Mon, 14 May 2012 16:47:24 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	David Laight <David.Laight@...LAB.COM>,
	netfilter-devel@...r.kernel.org, davem@...emloft.net,
	netdev@...r.kernel.org, Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Subject: Re: [PATCH 1/4] netfilter: ipset: fix timeout value overflow bug

On Mon, 2012-05-14 at 16:36 +0200, Pablo Neira Ayuso wrote:
> On Mon, May 14, 2012 at 03:19:49PM +0100, David Laight wrote:
> >  
> > > --- a/include/linux/netfilter/ipset/ip_set_timeout.h
> > > +++ b/include/linux/netfilter/ipset/ip_set_timeout.h
> > > @@ -30,6 +30,10 @@ ip_set_timeout_uget(struct nlattr *tb)
> > >  {
> > >  	unsigned int timeout = ip_set_get_h32(tb);
> > >  
> > > +	/* Normalize to fit into jiffies */
> > > +	if (timeout > UINT_MAX/1000)
> > > +		timeout = UINT_MAX/1000;
> > > +
> > 
> > Doesn't that rather assume that HZ is 1000 ?
> 
> Indeed. I overlooked that. Thanks David.

I dont think so.

1000 here is really MSEC_PER_SEC

(All occurrences should be changed in this file)


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