linux-kernel - Re: new ELF marking

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <5a612234-ae9a-e66b-9810-02331a569a2e@redhat.com>
Date:   Wed, 9 Aug 2017 18:37:35 -0400
From:   Carlos O'Donell <carlos@...hat.com>
To:     "H.J. Lu" <hjl.tools@...il.com>, Kostya Serebryany <kcc@...gle.com>
Cc:     Kees Cook <keescook@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Binutils <binutils@...rceware.org>
Subject: Re: new ELF marking

On 08/09/2017 05:24 PM, H.J. Lu wrote:
> On Wed, Aug 9, 2017 at 1:32 PM, Kostya Serebryany <kcc@...gle.com> wrote:
>>>>
>>>> I believe this would only be an output bit, but I'm not sure how it
>>>> would be wired into binutils. Kostya, do you know any details about
>>>> how AddressSanitizer might be able to create this ELF note?
>>
>> I don't, hopefully H.J's suggestion works.
>> Will it be backward compatible?
>> (i.e. will the binaries built in the new way work on the old kernels?)
>>
>>
> 
> Yes,  it is backward compatible by design.

... only as long as the semantics implied by the flags are hints that
can be ignored.

-- 
Cheers,
Carlos.