linux-kernel - Re: [PATCH 0/3] properly account for stack randomization and guard gap

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Message-ID: <20170623083521.f62me7efrm4ygawq@gmail.com>
Date:   Fri, 23 Jun 2017 10:35:21 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     riel@...hat.com
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        will.deacon@....com, danielmicay@...il.com,
        benh@...nel.crashing.org, hughd@...gle.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Dave Jones <davej@...emonkey.org.uk>,
        Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH 0/3] properly account for stack randomization and guard
 gap


* riel@...hat.com <riel@...hat.com> wrote:

> When RLIMIT_STACK is larger than the minimum gap enforced by
> mmap_base(), it is possible for the kernel to place the mmap
> area where the stack wants to grow, resulting in the stack
> not being able to use the space that should have been allocated
> to it through RLIMIT_STACK.
> 
> This series ensures that x86, ARM64, and PPC have at least
> RLIMIT_STACK + stack randomization + the stack guard gap
> space available for the stack.
> 
> s390 seems to be ok. I have not checked other architectures.

x86 patch LGTM:

  Acked-by: Ingo Molnar <mingo@...nel.org>

... but I suspect this wants to go via -mm or Linus directly?

Thanks,

	Ingo