linux-kernel - Re: [RFC PATCH v2 0/2] Randomization of address chosen by mmap.

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Date:   Thu, 22 Mar 2018 13:57:29 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Ilya Smith <blackzert@...il.com>
Cc:     rth@...ddle.net, ink@...assic.park.msu.ru, mattst88@...il.com,
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Subject: Re: [RFC PATCH v2 0/2] Randomization of address chosen by mmap.

On Thu, 22 Mar 2018 19:36:36 +0300 Ilya Smith <blackzert@...il.com> wrote:

> Current implementation doesn't randomize address returned by mmap.
> All the entropy ends with choosing mmap_base_addr at the process
> creation. After that mmap build very predictable layout of address
> space. It allows to bypass ASLR in many cases.

Perhaps some more effort on the problem description would help.  *Are*
people predicting layouts at present?  What problems does this cause? 
How are they doing this and are there other approaches to solving the
problem?

Mainly: what value does this patchset have to our users?  This reader
is unable to determine that from the information which you have
provided.  Full details, please.