linux-kernel - Re: [PATCH] mm: mm, mmap: do not blow on PROT_NONE MAP

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Date:   Wed, 5 Jul 2017 21:17:25 +0200
From:   Willy Tarreau <w@....eu>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Ben Hutchings <ben@...adent.org.uk>,
        Oleg Nesterov <oleg@...hat.com>,
        Rik van Riel <riel@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH] mm: mm, mmap: do not blow on PROT_NONE MAP_FIXED holes
 in the stack

On Wed, Jul 05, 2017 at 12:15:05PM -0700, Linus Torvalds wrote:
> On Wed, Jul 5, 2017 at 11:53 AM, Michal Hocko <mhocko@...nel.org> wrote:
> >
> > That would lead to conflicts when backporting to stable trees though
> > which is quite annoying as well and arguably slightly more annoying than
> > resolving this in mmotm. I can help to rebase Oleg's patch on top of
> > mine which is not a stable material.
> 
> Ok, fair enough - I was actually expecting that Oleg's patch would
> just be marked for stable too just to keep differences minimal.
> 
> But yes, putting your patch in first and then Oleg's on top means that
> it works regardless.
> 
> Any opinions from others?

No pb here, and this one is reasonably easy to backport anyway as the
test is easy to locate.

Willy