[PATCH] proc: prevent a task from writing on its own /proc/*/mem

[Kees Cook]

On Sat, May 26, 2018 at 6:33 PM, Linus Torvalds
<torvalds at linux-foundation.org> wrote:
> Thus commit f511c0b17b08 "Yes, people use FOLL_FORCE ;)"
>
> Side note, that very sam ecommit f511c0b17b08 is also the explanation for
> why the patch under discussion now seems broken.
>
> People really do use "write to /proc/self/mem" as a way to keep the
> mappings read-only, but have a way to change them when required.

Ah! Yes, that is the commit I was trying to find. Thanks!

-Kees

-- 
Kees Cook
Pixel Security
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