linux-kernel - Re: [PATCH] binfmt_elf: Move brk out of mmap when doing direct loader exec

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Message-Id: <20190416163757.b7bb6b42806e99ea11085794@linux-foundation.org>
Date:   Tue, 16 Apr 2019 16:37:57 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Ali Saidi <alisaidi@...zon.com>, Michal Hocko <mhocko@...e.com>,
        Matthew Wilcox <willy@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jann Horn <jannh@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] binfmt_elf: Move brk out of mmap when doing direct
 loader exec

On Tue, 16 Apr 2019 18:14:00 -0500 Kees Cook <keescook@...omium.org> wrote:

> On Tue, Apr 16, 2019 at 6:04 PM Andrew Morton <akpm@...ux-foundation.org> wrote:
> >
> > >
> > > Reported-by: Ali Saidi <alisaidi@...zon.com>
> > > Link: https://lkml.kernel.org/r/CAGXu5jJ5sj3emOT2QPxQkNQk0qbU6zEfu9=Omfhx_p0nCKPSjA@mail.gmail.com
> > > Fixes: eab09532d400 ("binfmt_elf: use ELF_ET_DYN_BASE only for PIE")
> > > Signed-off-by: Kees Cook <keescook@...omium.org>
> >
> > No cc:stable?
> 
> Probably it should be, yes. I think I'm just shy about that when
> poking ELF mappings. :)

Well, the -stable bots will backport anything that might look slightly
like a fix anyway.

I'll add cc:stable and shall hold it out until 5.2-rc1, so it should
get a bit of a spin before being backported.