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

Andrew Morton
2018-03-22T20:57:29Z

On Thu, 22 Mar 2018 19:36:36 +0300 Ilya Smith <blackzert@gmail.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.