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

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Date:	Mon, 14 May 2012 16:36:35 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	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, 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.

New patch attached fixing this. I've rebased my tree.

@Jozsef: BTW, why do we have

include/linux/netfilter/ipset/ip_set_timeout.h

living under include/linux ?

All definitions are private to the kernel. Why not moving that header
(and other similar) to include/net ?

View attachment "0001-netfilter-ipset-fix-timeout-value-overflow-bug.patch" of type "text/x-diff" (2646 bytes)