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Date:   Thu, 21 May 2020 10:15:56 -0500
From:   Josh Poimboeuf <>
To:     Yu-cheng Yu <>
Cc:, "H. Peter Anvin" <>,
        Thomas Gleixner <>,
        Ingo Molnar <>,,,,,,
        Arnd Bergmann <>,
        Andy Lutomirski <>,
        Balbir Singh <>,
        Borislav Petkov <>,
        Cyrill Gorcunov <>,
        Dave Hansen <>,
        Eugene Syromiatnikov <>,
        Florian Weimer <>,
        "H.J. Lu" <>, Jann Horn <>,
        Jonathan Corbet <>,
        Kees Cook <>,
        Mike Kravetz <>,
        Nadav Amit <>,
        Oleg Nesterov <>, Pavel Machek <>,
        Peter Zijlstra <>,
        Randy Dunlap <>,
        "Ravi V. Shankar" <>,
        Vedvyas Shanbhogue <>,
        Dave Martin <>,
        Weijiang Yang <>
Subject: Re: [PATCH v10 00/26] Control-flow Enforcement: Shadow Stack

On Wed, Apr 29, 2020 at 03:07:06PM -0700, Yu-cheng Yu wrote:
> Control-flow Enforcement (CET) is a new Intel processor feature that blocks
> return/jump-oriented programming attacks.  Details can be found in "Intel
> 64 and IA-32 Architectures Software Developer's Manual" [1].
> This series depends on the XSAVES supervisor state series that was split
> out and submitted earlier [2].
> I have gone through previous comments, and hope all concerns have been
> resolved now.  Please inform me if anything is overlooked.
> Changes in v10:

Hi Yu-cheng,

Do you have a git branch with the latest Shadow Stack and IBT branches
applied?  I tried to apply IBT v9 on top of this, but I guess the SS
code has changed since then and it didn't apply cleanly.


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