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Date: Thu, 4 Feb 2016 10:19:55 -0800
From: Kees Cook <>
To: David Windsor <>
Cc: "" <>
Subject: Re: [RFC PATCH v2 00/12] Add PAX_REFCOUNT overflow protection

On Tue, Feb 2, 2016 at 3:33 AM, David Windsor <> wrote:
> FYI, I now have time to work on this again.
> Currently, I'm rebasing v2 atop linux-next.  I've already incorporated
> the following changes suggested during the on-list review of v2:
> * Reordering the patchset in a more sane manner (per Greg KH)
> * Creation of the "Kernel Hardening" menu in Kconfig
> * Creation of per-architecture Kconfig option for opting in to STRICT_REFCOUNT
> * Whitespace fixes
> v3 is forthcoming and will be posted here as soon as I have the
> patchset rebased to linux-next.

Thanks for the update!

It may be helpful to mention in the changelog the two recent refcount
overflow bugs that would have been stopped by this mitigiation:



Kees Cook
Chrome OS & Brillo Security

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