linux-kernel - Re: [PATCH 1/1] Ddrivers: hv: Turn off write permission on the hypercall page

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Date:   Thu, 9 Feb 2017 07:54:31 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     kys@...rosoft.com
Cc:     linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
        olaf@...fle.de, apw@...onical.com, vkuznets@...hat.com,
        jasowang@...hat.com, leann.ogasawara@...onical.com,
        keescook@...gle.com, stephen@...workplumber.org, sds@...ho.nsa.gov,
        stable@...r.kernel.org
Subject: Re: [PATCH 1/1] Ddrivers: hv: Turn off write permission on the
 hypercall page

On Wed, Feb 08, 2017 at 06:30:56PM -0700, kys@...hange.microsoft.com wrote:
> From: K. Y. Srinivasan <kys@...rosoft.com>
> 
> The hypercall page only needs to be executable but currently it is setup to
> be writable as well. Fix the issue.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> Cc: <stable@...r.kernel.org>

What type of bug is this fixing that it is needed to be backported?
Does this affect any current users?  How far back should it go?

thanks,

greg k-h