linux-kernel - Re: [PATCH 6/7] x86, mm: setup page table from top-down

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 10 Oct 2012 10:38:36 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Jacob Shin <jacob.shin@....com>,
	Tejun Heo <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/7] x86, mm: setup page table from top-down

On Wed, Oct 10, 2012 at 10:26 AM, Stefano Stabellini
<stefano.stabellini@...citrix.com> wrote:
> On Wed, 10 Oct 2012, Yinghai Lu wrote:
>
> It doesn't matter whether they come from BRK or other memory: Xen
> assumes that all the pagetable pages come from
> pgt_buf_start-pgt_buf_top, so if you are going to use another range you
> need to tell Xen about it.
>
> Alternatively, you can follow Peter's suggestion and replace the current
> hooks with a new one with a more precise and well defined semantic.
> Something along the lines of "this pagetable page is about to be hooked
> into the live pagetable". Xen would use the hook to mark it RO.

attached patch on top of this patch will fix the problem?

Download attachment "fix_xen.patch" of type "application/octet-stream" (3358 bytes)