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Date: Tue, 12 Jul 2016 14:44:35 -0400
From: Kees Cook <>
To: Valdis Kletnieks <>
Cc: "" <>
Subject: Re: [PATCH 0/9] mm: Hardened usercopy

On Tue, Jul 12, 2016 at 2:26 PM,  <> wrote:
> On Wed, 06 Jul 2016 15:25:19 -0700, Kees Cook said:
>> Hi,
>> This is a start of the mainline port of PAX_USERCOPY[1]. After I started
>> writing tests (now in lkdtm in -next) for Casey's earlier port[2], I
>> kept tweaking things further and further until I ended up with a whole
>> new patch series. To that end, I took Rik's feedback and made a number
>> of other changes and clean-ups as well.
> And the good news is that my issues with ptrace() and ping seem to
> have cleared up - I suspect there was a dangling piece of the original
> 4-patch series still lurking in my tree that appears to have been
> slayed by a 'git reset --hard'.
> Am running a next-20160708 kernel with the 9-patch series and it's working...

Great! Thanks for checking. :)


Kees Cook
Chrome OS & Brillo Security

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