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From: "H. Peter Anvin" <hpa@zytor.com>
To: matthieu castet <castet.matthieu@free.fr>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: Using x86 segments against NULL pointer deference exploit
Date: Sun, 08 Nov 2009 22:30:45 -0800	[thread overview]
Message-ID: <4AF7B715.7080205@zytor.com> (raw)
In-Reply-To: <4AF488A7.4010408@free.fr>

On 11/06/2009 12:35 PM, matthieu castet wrote:
> 
> May be the sane way should be to forbid mapping page 0, and make run
> application needing page 0 in a
> emulator. After all it is for special case [1] :
> - Win16 binary for wine
> - upstream version of dosemu and qemu have workaround
> 
> But some distro still set mmap_min_addr to 0 (ubuntu+wine, ...) :(
> 

Don't Do That, Then[TM].

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


  reply	other threads:[~2009-11-09  6:30 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-06 12:59 Using x86 segments against NULL pointer deference exploit castet.matthieu
2009-11-06 13:13 ` Alan Cox
2009-11-06 20:35   ` matthieu castet
2009-11-09  6:30     ` H. Peter Anvin [this message]
2009-11-06 20:18 ` Andi Kleen
2009-11-08 14:38   ` matthieu castet
2009-11-08 19:41     ` Andi Kleen
2009-11-06 20:58 ` Jiri Kosina
2009-11-06 22:54 ` H. Peter Anvin
2009-11-07 10:20   ` Jiri Kosina
     [not found] <dDwJH-3PE-7@gated-at.bofh.it>
2009-11-10 16:46 ` Markku Savela
2009-11-11 14:11   ` Jiri Kosina

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