linux-kernel - Re: [PATCH] netlink: fix overrun in attribute iteration

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Message-ID: <20080912003522.GN20815@postel.suug.ch>
Date:	Fri, 12 Sep 2008 02:35:23 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	David Miller <davem@...emloft.net>
Cc:	vegard.nossum@...il.com, netdev@...r.kernel.org,
	penberg@...helsinki.fi, mingo@...e.hu, viro@...iv.linux.org.uk,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netlink: fix overrun in attribute iteration

* David Miller <davem@...emloft.net> 2008-09-11 15:04
> From: Vegard Nossum <vegard.nossum@...il.com>
> Thomas, please review.
> 
> > diff --git a/include/net/netlink.h b/include/net/netlink.h
> > index 18024b8..208fe5a 100644
> > --- a/include/net/netlink.h
> > +++ b/include/net/netlink.h
> > @@ -702,7 +702,7 @@ static inline int nla_len(const struct nlattr *nla)
> >   */
> >  static inline int nla_ok(const struct nlattr *nla, int remaining)
> >  {
> > -	return remaining >= sizeof(*nla) &&
> > +	return remaining >= (int) sizeof(*nla) &&
> >  	       nla->nla_len >= sizeof(*nla) &&
> >  	       nla->nla_len <= remaining;
> >  }

Very nice catch, would never have thought of that.
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