From: Andrey Korolyov <andrey@xdel.ru>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>,
"Bandan Das" <bsd@redhat.com>,
"Kevin O'Connor" <kevin@koconnor.net>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] E5-2620v2 - emulation stop error
Date: Thu, 2 Apr 2015 01:58:07 +0300 [thread overview]
Message-ID: <CABYiri-EAgZ0u2+HJwE5xztRQxXs8gftr=J1X7WHHDer-j=5DA@mail.gmail.com> (raw)
In-Reply-To: <CABYiri-b4tsES=t65C+eUV20nhbYf9uiDVLNzyTup2MY3noohQ@mail.gmail.com>
*putting my tinfoil hat on*
After thinking a little bit more, the observable behavior is a quite
good match for a bios-level hypervisor (hardware trojan in a modern
terminology), as it likely is sensitive to timing[1], does not appear
more than once per VM during boot cycle and seemingly does not regard
a fact if kvm-intel was reloaded once or twice (or more) and not
reproducible outside of domain of a single board model. If nobody has
a better suggestions to try on, I`ll do a couple of steps in a next
days:
- extract and compare bios to the vendor`s image with SPI programmer,
- extract and compare BMC image with public version (should be easy as well),
- try to analyze switch timings by writing sample code for a bare
hardware (there can be a hint that the L2 Linux guest can expose
larger execution time difference with L1 on host with top-level
hypervisor than on supposedly 'non-infected' one),
- try to analyze binary BIOS code itself, though it can be VERY
problematic, I am even not talking for same possibility for BMC.
Sorry for posting such a naive and stupid stuff in the public ml, but
I am really out of clues of what`s happening there and why it is not
reproducible anywhere else.
1. https://xakep.ru/2011/12/26/58104/ (russian text, but can be read
through g-translate without lack of details)
WARNING: multiple messages have this Message-ID (diff)
From: Andrey Korolyov <andrey@xdel.ru>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Bandan Das" <bsd@redhat.com>,
"Kevin O'Connor" <kevin@koconnor.net>,
"Gerd Hoffmann" <kraxel@redhat.com>
Subject: Re: [Qemu-devel] E5-2620v2 - emulation stop error
Date: Thu, 2 Apr 2015 01:58:07 +0300 [thread overview]
Message-ID: <CABYiri-EAgZ0u2+HJwE5xztRQxXs8gftr=J1X7WHHDer-j=5DA@mail.gmail.com> (raw)
In-Reply-To: <CABYiri-b4tsES=t65C+eUV20nhbYf9uiDVLNzyTup2MY3noohQ@mail.gmail.com>
*putting my tinfoil hat on*
After thinking a little bit more, the observable behavior is a quite
good match for a bios-level hypervisor (hardware trojan in a modern
terminology), as it likely is sensitive to timing[1], does not appear
more than once per VM during boot cycle and seemingly does not regard
a fact if kvm-intel was reloaded once or twice (or more) and not
reproducible outside of domain of a single board model. If nobody has
a better suggestions to try on, I`ll do a couple of steps in a next
days:
- extract and compare bios to the vendor`s image with SPI programmer,
- extract and compare BMC image with public version (should be easy as well),
- try to analyze switch timings by writing sample code for a bare
hardware (there can be a hint that the L2 Linux guest can expose
larger execution time difference with L1 on host with top-level
hypervisor than on supposedly 'non-infected' one),
- try to analyze binary BIOS code itself, though it can be VERY
problematic, I am even not talking for same possibility for BMC.
Sorry for posting such a naive and stupid stuff in the public ml, but
I am really out of clues of what`s happening there and why it is not
reproducible anywhere else.
1. https://xakep.ru/2011/12/26/58104/ (russian text, but can be read
through g-translate without lack of details)
next prev parent reply other threads:[~2015-04-01 22:58 UTC|newest]
Thread overview: 157+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-05 22:14 E5-2620v2 - emulation stop error Andrey Korolyov
2015-03-05 22:14 ` [Qemu-devel] " Andrey Korolyov
2015-03-05 23:44 ` Andrey Korolyov
2015-03-05 23:44 ` [Qemu-devel] " Andrey Korolyov
2015-03-06 16:57 ` Bandan Das
2015-03-06 16:57 ` Bandan Das
2015-03-07 0:00 ` Andrey Korolyov
2015-03-10 14:24 ` Andrey Korolyov
2015-03-10 16:57 ` Dr. David Alan Gilbert
2015-03-10 18:08 ` Andrey Korolyov
2015-03-10 18:16 ` Dr. David Alan Gilbert
2015-03-10 18:21 ` Andrey Korolyov
2015-03-10 19:30 ` Paolo Bonzini
2015-03-10 18:10 ` Paolo Bonzini
2015-03-10 18:21 ` Bandan Das
2015-03-10 18:21 ` Bandan Das
2015-03-10 19:25 ` Paolo Bonzini
2015-03-10 19:25 ` Paolo Bonzini
2015-03-10 19:37 ` Dr. David Alan Gilbert
2015-03-10 20:29 ` Dr. David Alan Gilbert
2015-03-10 20:29 ` Dr. David Alan Gilbert
2015-03-11 2:38 ` Bandan Das
2015-03-11 2:38 ` Bandan Das
2015-03-11 13:45 ` Dr. David Alan Gilbert
2015-03-11 13:45 ` Dr. David Alan Gilbert
2015-03-11 15:42 ` Kevin O'Connor
2015-03-11 15:42 ` Kevin O'Connor
2015-03-11 15:53 ` Dr. David Alan Gilbert
2015-03-11 15:53 ` Dr. David Alan Gilbert
2015-03-11 16:37 ` Kevin O'Connor
2015-03-11 16:37 ` [Qemu-devel] " Kevin O'Connor
2015-03-11 16:52 ` Dr. David Alan Gilbert
2015-03-11 16:52 ` Dr. David Alan Gilbert
2015-03-11 17:37 ` Kevin O'Connor
2015-03-11 17:37 ` Kevin O'Connor
2015-03-11 17:41 ` Paolo Bonzini
2015-03-11 17:41 ` Paolo Bonzini
2015-03-11 17:59 ` Dr. David Alan Gilbert
2015-03-11 17:59 ` Dr. David Alan Gilbert
2015-03-11 18:24 ` Bandan Das
2015-03-11 18:24 ` Bandan Das
2015-03-11 18:40 ` Kevin O'Connor
2015-03-11 18:40 ` Kevin O'Connor
2015-03-11 18:45 ` Kevin O'Connor
2015-03-11 18:45 ` Kevin O'Connor
2015-03-11 19:19 ` Kevin O'Connor
2015-03-11 19:19 ` Kevin O'Connor
2015-03-11 19:33 ` Dr. David Alan Gilbert
2015-03-11 19:33 ` Dr. David Alan Gilbert
2015-03-11 19:47 ` Bandan Das
2015-03-11 19:47 ` Bandan Das
2015-03-11 19:47 ` Andrey Korolyov
2015-03-11 19:47 ` Andrey Korolyov
2015-03-11 19:59 ` Dr. David Alan Gilbert
2015-03-11 19:59 ` Dr. David Alan Gilbert
2015-03-11 20:09 ` Andrey Korolyov
2015-03-11 20:09 ` Andrey Korolyov
2015-03-12 9:59 ` Dr. David Alan Gilbert
2015-03-12 9:59 ` Dr. David Alan Gilbert
2015-03-12 10:47 ` Andrey Korolyov
2015-03-12 10:47 ` Andrey Korolyov
2015-03-16 19:17 ` Andrey Korolyov
2015-03-16 19:17 ` Andrey Korolyov
2015-03-16 19:26 ` Dr. David Alan Gilbert
2015-03-16 19:26 ` Dr. David Alan Gilbert
2015-03-25 20:43 ` Andrey Korolyov
2015-03-25 20:43 ` [Qemu-devel] " Andrey Korolyov
2015-03-25 20:46 ` Andrey Korolyov
2015-03-25 20:46 ` [Qemu-devel] " Andrey Korolyov
2015-03-25 20:54 ` Kevin O'Connor
2015-03-25 20:54 ` Kevin O'Connor
2015-03-25 22:31 ` Andrey Korolyov
2015-03-25 22:31 ` Andrey Korolyov
2015-03-25 23:02 ` Kevin O'Connor
2015-03-25 23:02 ` Kevin O'Connor
2015-03-25 23:35 ` Andrey Korolyov
2015-03-25 23:35 ` Andrey Korolyov
2015-03-26 0:05 ` Kevin O'Connor
2015-03-26 0:05 ` Kevin O'Connor
2015-03-26 15:58 ` Radim Krčmář
2015-03-26 15:58 ` Radim Krčmář
2015-03-26 16:36 ` Kevin O'Connor
2015-03-26 16:36 ` [Qemu-devel] " Kevin O'Connor
2015-03-26 16:48 ` Andrey Korolyov
2015-03-26 16:48 ` Andrey Korolyov
2015-03-26 17:06 ` Kevin O'Connor
2015-03-26 17:06 ` Kevin O'Connor
2015-03-26 17:08 ` Andrey Korolyov
2015-03-26 17:08 ` Andrey Korolyov
2015-03-26 17:18 ` Kevin O'Connor
2015-03-26 17:18 ` Kevin O'Connor
2015-03-26 17:33 ` Andrey Korolyov
2015-03-26 17:33 ` Andrey Korolyov
2015-03-26 17:40 ` Radim Krčmář
2015-03-26 17:40 ` Radim Krčmář
2015-03-26 18:24 ` Andrey Korolyov
2015-03-26 18:24 ` Andrey Korolyov
2015-03-26 20:40 ` Radim Krčmář
2015-03-26 20:40 ` Radim Krčmář
2015-03-26 21:03 ` Bandan Das
2015-03-26 21:03 ` Bandan Das
2015-03-27 10:16 ` Andrey Korolyov
2015-03-27 10:16 ` Andrey Korolyov
2015-03-30 18:56 ` Radim Krčmář
2015-03-30 18:56 ` [Qemu-devel] " Radim Krčmář
2015-03-30 19:32 ` Andrey Korolyov
2015-03-30 19:32 ` Andrey Korolyov
2015-03-31 13:45 ` Radim Krčmář
2015-03-31 13:45 ` [Qemu-devel] " Radim Krčmář
2015-03-31 14:56 ` Andrey Korolyov
2015-03-31 14:56 ` Andrey Korolyov
2015-03-31 16:45 ` Radim Krčmář
2015-03-31 16:45 ` [Qemu-devel] " Radim Krčmář
2015-03-31 17:40 ` Andrey Korolyov
2015-03-31 17:40 ` Andrey Korolyov
2015-03-31 18:01 ` Bandan Das
2015-03-31 18:01 ` Bandan Das
2015-03-31 18:04 ` Bandan Das
2015-03-31 18:04 ` [Qemu-devel] " Bandan Das
2015-03-31 18:23 ` Andrey Korolyov
2015-03-31 18:23 ` Andrey Korolyov
2015-04-01 11:49 ` Radim Krčmář
2015-04-01 11:49 ` Radim Krčmář
2015-04-01 12:05 ` Paolo Bonzini
2015-04-01 12:05 ` Paolo Bonzini
2015-04-01 12:26 ` Andrey Korolyov
2015-04-01 12:26 ` Andrey Korolyov
2015-04-01 13:19 ` Paolo Bonzini
2015-04-01 13:19 ` Paolo Bonzini
2015-04-01 15:37 ` Andrey Korolyov
2015-04-01 15:37 ` Andrey Korolyov
2015-04-01 16:29 ` Andrey Korolyov
2015-04-01 16:29 ` Andrey Korolyov
2015-04-01 22:58 ` Andrey Korolyov [this message]
2015-04-01 22:58 ` Andrey Korolyov
2015-04-05 14:12 ` Andrey Korolyov
2015-04-05 14:12 ` [Qemu-devel] " Andrey Korolyov
2015-03-27 11:54 ` Andrey Korolyov
2015-03-27 11:54 ` Andrey Korolyov
2015-03-30 19:28 ` Radim Krčmář
2015-03-30 19:28 ` Radim Krčmář
2015-03-26 17:35 ` Radim Krčmář
2015-03-26 17:35 ` Radim Krčmář
2015-03-26 17:34 ` Radim Krčmář
2015-03-26 17:34 ` Radim Krčmář
2015-03-26 2:47 ` Bandan Das
2015-03-26 2:47 ` Bandan Das
2015-03-26 9:18 ` Andrey Korolyov
2015-03-26 9:18 ` Andrey Korolyov
2015-03-26 15:05 ` Andrey Korolyov
2015-03-26 15:05 ` Andrey Korolyov
2015-03-11 17:09 ` Bandan Das
2015-03-11 17:09 ` Bandan Das
2015-03-11 17:32 ` Kevin O'Connor
2015-03-11 17:32 ` Kevin O'Connor
2015-03-11 18:01 ` Bandan Das
2015-03-11 18:01 ` Bandan Das
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