From: "Luck, Tony" <tony.luck@intel.com>
To: speck@linutronix.de
Subject: [MODERATED] Re: [PATCH v2 6/8] MDSv2 3
Date: Mon, 10 Dec 2018 16:46:22 -0800 [thread overview]
Message-ID: <20181211004622.GA24945@agluck-desk> (raw)
In-Reply-To: <fa1f5b14-1f23-a762-b508-072b09b68fff@citrix.com>
On Tue, Dec 11, 2018 at 12:37:49AM +0000, speck for Andrew Cooper wrote:
> On 10/12/2018 17:53, speck for Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> Interrupting the middle of the software sequence is only one half of the
> problem.
>
> The other half is when an NMI/#MC/etc hits on the return to guest path
> after executing VERW, at which point you've just refilled all the
> buffers between trying to clear them, and returning to userspace.
NMI would seem to be the only exploitable option (since user might
user perf to arrange an NMI in this window ... user can't force #MC
or SMI on command).
Would NMI fill the microarchitectural buffers with secrets?
-Tony
next prev parent reply other threads:[~2018-12-11 0:46 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 17:53 [MODERATED] [PATCH v2 0/8] MDSv2 8 Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 1/8] MDSv2 4 Andi Kleen
2018-12-11 14:14 ` [MODERATED] " Paolo Bonzini
2018-12-12 21:22 ` Konrad Rzeszutek Wilk
2018-12-12 21:28 ` Andi Kleen
2018-12-12 21:25 ` Konrad Rzeszutek Wilk
2018-12-10 17:53 ` [MODERATED] [PATCH v2 2/8] MDSv2 1 Andi Kleen
2018-12-10 22:49 ` [MODERATED] " Jiri Kosina
2018-12-11 0:03 ` Andi Kleen
2018-12-11 0:13 ` Kanth Ghatraju
2018-12-11 2:00 ` Andi Kleen
2018-12-11 5:36 ` Jiri Kosina
2018-12-11 10:03 ` Borislav Petkov
2018-12-12 21:31 ` Konrad Rzeszutek Wilk
2018-12-12 21:43 ` Andi Kleen
2018-12-12 22:17 ` Borislav Petkov
2018-12-12 22:40 ` Konrad Rzeszutek Wilk
2018-12-12 22:45 ` Borislav Petkov
2018-12-13 15:15 ` Andrew Cooper
2018-12-13 16:52 ` Borislav Petkov
2018-12-10 17:53 ` [MODERATED] [PATCH v2 3/8] MDSv2 5 Andi Kleen
2018-12-10 23:00 ` [MODERATED] " Linus Torvalds
2018-12-11 0:03 ` Andi Kleen
2018-12-11 0:43 ` Linus Torvalds
2018-12-11 1:33 ` Linus Torvalds
2018-12-11 2:12 ` Andi Kleen
2018-12-11 2:20 ` Linus Torvalds
2018-12-11 3:25 ` Andi Kleen
2018-12-11 17:55 ` Linus Torvalds
2018-12-11 18:10 ` Borislav Petkov
2018-12-11 18:21 ` Linus Torvalds
2018-12-11 18:26 ` Borislav Petkov
2018-12-11 19:47 ` Andi Kleen
2018-12-11 21:22 ` Thomas Gleixner
2018-12-12 14:02 ` [MODERATED] " Paolo Bonzini
2018-12-12 17:58 ` Andi Kleen
2018-12-12 18:47 ` Linus Torvalds
2018-12-13 19:44 ` Linus Torvalds
2018-12-13 20:48 ` Andi Kleen
2018-12-13 20:56 ` Linus Torvalds
2018-12-15 0:30 ` Andi Kleen
2018-12-11 2:10 ` Andi Kleen
2018-12-11 0:09 ` Andrew Cooper
2018-12-10 17:53 ` [MODERATED] [PATCH v2 4/8] MDSv2 0 Andi Kleen
2018-12-12 21:45 ` [MODERATED] " Konrad Rzeszutek Wilk
2018-12-12 22:09 ` Andi Kleen
2018-12-12 22:36 ` Konrad Rzeszutek Wilk
2018-12-10 17:53 ` [MODERATED] [PATCH v2 5/8] MDSv2 7 Andi Kleen
2018-12-11 0:33 ` [MODERATED] " Andrew Cooper
2018-12-12 18:05 ` Andrew Cooper
2018-12-12 21:41 ` Konrad Rzeszutek Wilk
2018-12-12 22:12 ` Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 6/8] MDSv2 3 Andi Kleen
2018-12-11 0:37 ` [MODERATED] " Andrew Cooper
2018-12-11 0:46 ` Luck, Tony [this message]
2018-12-11 1:02 ` Andrew Cooper
2018-12-11 1:53 ` Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 7/8] MDSv2 6 Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 8/8] MDSv2 2 Andi Kleen
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