linux-kernel - Re: [PATCH v6 00/11] Intel SGX Driver

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Message-Id: <201801042109.w04L961C032047@wind.enjellic.com>
Date:   Thu, 4 Jan 2018 15:09:06 -0600
From:   "Dr. Greg Wettstein" <greg@...d.enjellic.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Cedric Blancher <cedric.blancher@...il.com>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org, x86@...nel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...e.de>,
        "David S. Miller" <davem@...emloft.net>,
        Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>,
        Haim Cohen <haim.cohen@...el.com>,
        Ingo Molnar <mingo@...nel.org>,
        Janakarajan Natarajan <Janakarajan.Natarajan@....com>,
        Jim Mattson <jmattson@...gle.com>,
        Kan Liang <Kan.liang@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Kyle Huey <me@...ehuey.com>, Len Brown <len.brown@...el.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        "open list:FILESYSTEMS (VFS and infrastructure)" 
        <linux-fsdevel@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Piotr Luc <piotr.luc@...el.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>
Subject: Re: [PATCH v6 00/11] Intel SGX Driver

On Jan 4,  3:27pm, Greg Kroah-Hartman wrote:
} Subject: Re: [PATCH v6 00/11] Intel SGX Driver

Wild day, enjoyed by all I'm sure.

> On Thu, Jan 04, 2018 at 03:17:24PM +0100, Cedric Blancher wrote:
> > So how does this protect against the MELTDOWN attack (CVE-2017-5754)
> > and the MELTATOMBOMBA4 worm which uses this exploit?

> It has nothing to do with it at all, sorry.

Precision seems to be everything in these discussions.

Since SGX obviously does not mitigate micro-architectural state
probing it is not an effective general remediation against MELTDOWN.
Does your statement indicate there is solid documentation that
MELTDOWN can be used by a process of any privilege level to dump out
the unencrypted contents of an initialized enclave?

That would obviously be a big story as well.

> greg k-h

Have a good evening.

Greg

}-- End of excerpt from Greg Kroah-Hartman

As always,
Dr. G.W. Wettstein, Ph.D.   Enjellic Systems Development, LLC.
4206 N. 19th Ave.           Specializing in information infra-structure
Fargo, ND  58102            development.
PH: 701-281-1686
FAX: 701-281-3949           EMAIL: greg@...ellic.com
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