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From: Dave Young <dyoung@redhat.com>
To: Kees Cook <keescook@chromium.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: kaslr should avoid setup_data region
Date: Thu, 24 Apr 2014 10:50:16 +0800	[thread overview]
Message-ID: <20140424025016.GB2180@darkstar.nay.redhat.com> (raw)
In-Reply-To: <CAGXu5j+TP2=iVYj=a6YGiGdOUqznb1MxdLLz5tjL8Hwwcq2K0Q@mail.gmail.com>

On 04/23/14 at 07:43pm, Kees Cook wrote:
> On Wed, Apr 23, 2014 at 7:35 PM, Dave Young <dyoung@redhat.com> wrote:
> > Hello Kees
> >
> > I'm worrying that setup_data regions could be overwitten by randomize
> > kernel base. Would you like to fix it in kaslr code?
> >
> > One problem is there could be a lot of setup_data regions but current
> > mem_avoid is an fixed array.
> 
> Sure, can you give me some examples? Seems like it shouldn't be too
> hard to have the mem_avoid logic walk additional areas.

Great, To walk through the list just like the function parse_setup_data in
arch/x86/kernel/setup.c

Thanks
Dave

  reply	other threads:[~2014-04-24  2:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-24  2:35 Dave Young
2014-04-24  2:43 ` Kees Cook
2014-04-24  2:50   ` Dave Young [this message]
2014-04-24 22:50     ` Kees Cook
2014-04-24 23:46       ` H. Peter Anvin
2014-04-25  9:44       ` Dave Young
2014-05-05  8:58       ` Dave Young
2014-05-08  9:46       ` Dave Young
2014-05-08 19:31         ` Kees Cook
2014-05-09  3:21           ` Dave Young

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