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Date: Fri, 27 Jan 2017 20:05:42 +0100
From: Richard Weinberger <>
To: Hoeun Ryu <>, Kees Cook <>
Cc: ""
Subject: Re: I'd like to contribute to this project.

Am 27.01.2017 um 20:03 schrieb Hoeun Ryu:
> On Fri, Jan 27, 2017 at 6:36 AM Kees Cook <> wrote:
>> On Thu, Jan 26, 2017 at 6:49 AM, Hoeun Ryu <> wrote:
>>> On Thu, Jan 26, 2017 at 4:41 AM, Kees Cook <> wrote:
>>>> On Wed, Jan 25, 2017 at 6:01 AM, Hoeun Ryu <> wrote:
>>>>> Hi. I'm Hoeun Ryu.
>>>> Hi! Nice to meet you!
>>>>> I've been reading arm/arm64 and mm/fs kernel code for the last few years.
>>>>> I stumbled upon the wiki page for this project and found this project seems
>>>>> very interesting.
>>>>> I think I can start to contibute to this project from porting small parts of
>>>>> PAX/GRSEC features that you guys haven't worked on yet.
>>>> Sure, that would be very welcome. Are there features you're especially
>>>> interested in?
>>> I tried to find out what features PAX/GRKERNSEC provides reading
>>> grsecurity wiki pages and the patch file today.
>>> It might take a week or two to find adequate features for me to tackle.
>>> But my guess after few hours of a brief investigation is `Deter
>>> exploit bruteforcing (GRKERNSEC_BRUTE)`
>>> Do you think the feature is worth it to you guys ? If not, please
>>> recommend others.
>> I'd really like to see this, yes. There have been attempts in the past
>> that got derailed. I strongly think it should be part of the kernel
>> (and not glibc, as got proposed):
>> I think it's worth trying it again.
> Ok. I will start to investigate the history of Richard's try for the
> feature and GRKERNSEC_BRUTE itself and how I can narrow the gap
> between the opinions.

Please go ahead. :-)
I simply didn't had the time to come up with another approach.


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