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

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Message-ID: <f00f71ff-fa3c-7cdf-6193-fac55b716479@oracle.com>
Date:   Tue, 4 Jul 2017 17:27:55 +0100
From:   John Haxby <john.haxby@...cle.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ben Hutchings <ben@...adent.org.uk>
Cc:     Michal Hocko <mhocko@...nel.org>, Willy Tarreau <w@....eu>,
        Hugh Dickins <hughd@...gle.com>,
        Oleg Nesterov <oleg@...hat.com>,
        "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" <security@...nel.org>,
        linux-distros@...openwall.org,
        Qualys Security Advisory <qsa@...lys.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Ximin Luo <infinity0@...ian.org>
Subject: Re: [PATCH] mm: larger stack guard gap, between vmas

On 04/07/17 17:18, Linus Torvalds wrote:
> Also, separately, John Haxby kind of implied that the LibreOffice
> regression on i386 is already fixed by commit f4cb767d76cf ("mm: fix
> new crash in unmapped_area_topdown()").

I'm not certain.   We had two distinct problems that were avoided by
Hugh's original patch together with f4cb767d76cf: the Oracle RDBMS
started and java programs worked.   In my mind I'm conflating the second
of these with problems in LibreOffice.

Alas, the people who could confirm this for me are getting ready to
watch fireworks and generally have a good time.

jch