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Message-ID: <1498230808.13083.29.camel@redhat.com>
Subject: Re: [PATCH 0/3] properly account for stack randomization and guard
 gap
From: Rik van Riel <riel@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
        will.deacon@arm.com, danielmicay@gmail.com, benh@kernel.crashing.org,
        hughd@google.com, Linus Torvalds <torvalds@linux-foundation.org>,
        Michal Hocko <mhocko@suse.com>, Dave Jones <davej@codemonkey.org.uk>,
        Oleg Nesterov <oleg@redhat.com>
Date: Fri, 23 Jun 2017 11:13:28 -0400
In-Reply-To: <20170623083521.f62me7efrm4ygawq@gmail.com>
References: <20170622200033.25714-1-riel@redhat.com>
         <20170623083521.f62me7efrm4ygawq@gmail.com>
Organization: Red Hat, Inc
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On Fri, 2017-06-23 at 10:35 +0200, Ingo Molnar wrote:
> * riel@redhat.com <riel@redhat.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@kernel.org>
> 
> ... but I suspect this wants to go via -mm or Linus directly?

I believe Andrew picked it up yesterday.