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Message-ID: <CAGXu5jK7LcS9M4NBZr3q8RVQss6GKQ-ifxhOTCMTAGZv3hF02A@mail.gmail.com>
Date: Thu, 10 Dec 2015 10:42:27 -0800
From: Kees Cook <keescook@...omium.org>
To: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Cc: Catalin Marinas <catalin.marinas@....com>, PaX Team <pageexec@...email.hu>
Subject: Re: Self Introduction
I've put the matrix up on the wiki here:
http://kernsec.org/wiki/index.php/Exploit_Methods/Userspace_data_usage
On Thu, Dec 10, 2015 at 9:55 AM, Daniel Micay <danielmicay@...il.com> wrote:
>> ARMv8 64-bit: ??
>
> The worst case scenario would be doing something like the x86_64 UDEREF.
>
>> x86 pre-late-Broadwell: nothing upstream (though UDEREF in PaX exists)
>
> It's worth noting that there's the pre-PCID implementation (slow and
> vulnerable to races) and then two choices of better implementations when
> PCID is available. You probably know that already, but it's not obvious
> to everyone else.
Yeah. PCID was Sandybridge and later?
-Kees
--
Kees Cook
Chrome OS & Brillo Security
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