linux-kernel - Re: [vs-plain] Re: [PATCH] mm: larger stack guard gap, between vmas

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Message-ID: <20170622135927.GA22684@1wt.eu>
Date:   Thu, 22 Jun 2017 15:59:27 +0200
From:   Willy Tarreau <w@....eu>
To:     Levente Polyak <anthraxx@...hlinux.org>
Cc:     Ben Hutchings <ben@...adent.org.uk>,
        Hugh Dickins <hughd@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Michal Hocko <mhocko@...nel.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Rik van Riel <riel@...hat.com>,
        Larry Woodman <lwoodman@...hat.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Tony Luck <tony.luck@...el.com>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Diller <deller@....de>,
        James Hogan <james.hogan@...tec.com>,
        Laura Abbott <labbott@...hat.com>, Greg KH <greg@...ah.com>,
        security@...nel.org, linux-distros@...openwall.org, qsa@...lys.com,
        stable <stable@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [vs-plain] Re: [PATCH] mm: larger stack guard gap, between vmas

Hi,

On Thu, Jun 22, 2017 at 03:15:51PM +0200, Levente Polyak wrote:
> Just a side note, but i think its worth mentioning to also have look at
> these fixup patches:
> 
> 
> -- mm: fix new crash in unmapped_area_topdown()
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f4cb767d76cf7ee72f97dd76f6cfa6c76a5edc89

As I mentionned in another mail (this thread starts to be huge), this
one seems to have already been included in Ben's backport.

> -- Allow stack to grow up to address space limit
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bd726c90b6b8ce87602208701b208a208e6d5600

This one cleanly applies after, but I think Ben is currently looking
for feedback on the validity of his backport which was a difficult task.

Regards,
Willy