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Date: Wed, 4 Apr 2018 15:46:36 -0700
From: Kees Cook <>
To: Keun-O Park <>
Cc: Will Deacon <>, 
	Kernel Hardening <>, James Morse <>, 
	Catalin Marinas <>, Mark Rutland <>,
Subject: Re: [PATCH 0/4] usercopy: reimplement arch_within_stack_frames

On Wed, Mar 28, 2018 at 3:16 AM, Keun-O Park <> wrote:
> Hi Will,
> On Mon, Mar 26, 2018 at 4:35 PM, Will Deacon <> wrote:
>> Hi Sahara,
>> On Thu, Mar 01, 2018 at 02:19:47PM +0400, wrote:
>>> From: Sahara <>
>>> This series of patches introduce the arm64 arch_within_stack_frames
>>> implementation using stacktrace functions. Also the base code is
>>> moved from thread_info.h to stacktrace.h. x86 code is reimplemented
>>> to use frame pointer unwinder functions.
>> What's the status on this series? I'm ok taking the arm64 patch from James
>> to bring us up to speed with x86, but it doesn't make sense without the
>> first patch in the series because the arch callback is out-of-line.
>> Will
> I haven't received any response from Kees or other engineers about
> this series of patches yet.
> Hi Kees, any comment on these patches to put these on the next stage?

Hi! Sorry for the delay, I'll send some notes now...


Kees Cook
Pixel Security

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