linux-hardening - Re: [PATCH] elf: Relax assumptions about vaddr ordering

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Date:   Wed, 2 Feb 2022 18:15:58 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Magnus Groß <magnus.gross@...h-aachen.de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Eric Biederman <ebiederm@...ssion.com>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH] elf: Relax assumptions about vaddr ordering

On Tue, Feb 01, 2022 at 02:48:16PM -0800, Andrew Morton wrote:
> On Fri, 28 Jan 2022 14:30:12 -0800 Kees Cook <keescook@...omium.org> wrote:
> 
> > Andrew, can you update elf-fix-overflow-in-total-mapping-size-calculation.patch
> > to include:
> > 
> > Fixes: 5f501d555653 ("binfmt_elf: reintroduce using MAP_FIXED_NOREPLACE")
> > Cc: stable@...r.kernel.org
> > Acked-by: Kees Cook <keescook@...omium.org>
> 
> Done.
> 
> I'm taking it that we can omit this patch ("elf: Relax assumptions
> about vaddr ordering") and that Alexey's "ELF: fix overflow in total
> mapping size calculation" will suffice?

Yes, it is same patch conceptually.
It should work, but those who can't play Bioshock are better test it.