linux-kernel - Re: [lkp-robot] [mm] 1be7107fbe: kernel_BUG_at

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Message-ID: <alpine.LSU.2.11.1706211238180.17033@eggly.anvils>
Date:   Wed, 21 Jun 2017 12:39:52 -0700 (PDT)
From:   Hugh Dickins <hughd@...gle.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
cc:     Hugh Dickins <hughd@...gle.com>,
        kernel test robot <xiaolong.ye@...el.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Michal Hocko <mhocko@...e.com>, Willy Tarreau <w@....eu>,
        LKML <linux-kernel@...r.kernel.org>, LKP <lkp@...org>
Subject: Re: [lkp-robot] [mm] 1be7107fbe: kernel_BUG_at_mm/mmap.c

On Wed, 21 Jun 2017, Linus Torvalds wrote:
> On Tue, Jun 20, 2017 at 7:41 PM, Hugh Dickins <hughd@...gle.com> wrote:
> > On Wed, 21 Jun 2017, kernel test robot wrote:
> >
> > Thanks for the report: yes, this is the same one as Dave Jones
> > found yesterday, which is fixed by this patch posted last night:
> 
> .. and that patch is in current -git now, so hopefully we're all good.
> 
> Hugh, Michal - I also merged Helge's drop-up cleanup, is there
> anything I've missed? I think Oleg had something, but I can't recall
> right now, and I might just have missed it.

No, the tree looks good now, thanks.  You're right that Oleg raised a
concern about how mmap(MAP_GROWSDOWN) behaves, and is wondering about
how to make it more sensible: but that's neither a vulnerability nor
a regression - he agreed minor, to think about another time.  He's
also been fielding a concern from the CRIU people, we're hoping that's
just something they need to fix at their end - ah, no, I see Oleg has
just replied ahead of me, not digested yet, I'll look into that later...

Hugh