Date: Thu, 10 Dec 2015 19:38:38 +0000 From: "Schaufler, Casey" <casey.schaufler@...el.com> To: Kees Cook <keescook@...omium.org>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com> CC: Catalin Marinas <catalin.marinas@....com>, PaX Team <pageexec@...email.hu>, Michael Ellerman <mpe@...erman.id.au>, Heiko Carstens <heiko.carstens@...ibm.com>, Ralf Baechle <ralf@...ux-mips.org> Subject: RE: Self Introduction > -----Original Message----- > From: keescook@...gle.com [mailto:keescook@...gle.com] On Behalf Of > Kees Cook > Sent: Thursday, December 10, 2015 11:24 AM > To: kernel-hardening@...ts.openwall.com > Cc: Catalin Marinas <catalin.marinas@....com>; PaX Team > <pageexec@...email.hu>; Michael Ellerman <mpe@...erman.id.au>; Heiko > Carstens <heiko.carstens@...ibm.com>; Ralf Baechle <ralf@...ux-mips.org> > Subject: Re: [kernel-hardening] Self Introduction > > On Thu, Dec 10, 2015 at 11:07 AM, Daniel Micay <danielmicay@...il.com> > wrote: > >> Yeah. PCID was Sandybridge and later? > > > > Yeah, that's right. And it defaults to the strong PCID implementation, > > but there's also a weaker but significantly faster PCID-based one. > > Is there anyone from Intel on the list? I would love to see UDEREF > ported to upstream on x86 (and the non PCID version too). No one has > stepped up to work on it yet. Yes, we're here. There are a couple things we need to do before making commitments on things, including deciding which are the most urgent from our perspective. We will be looking at what we want to do with UDEREF. > As for non-ARM and non-x86, IIRC s/390 has always had PAN, and I'd > love to update the matrix for powerpc and MIPS. > > http://kernsec.org/wiki/index.php/Exploit_Methods/Userspace_data_usage > > -Kees > > -- > Kees Cook > Chrome OS & Brillo Security
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