| 2019-05-17 15:59:58 |
Steve Beattie |
bug |
|
|
added bug |
| 2019-05-17 16:00:07 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2019-05-17 16:00:08 |
Ubuntu Kernel Bot |
tags |
|
trusty |
|
| 2019-05-17 16:00:12 |
Steve Beattie |
bug task added |
|
qemu (Ubuntu) |
|
| 2019-05-17 16:06:21 |
Steve Beattie |
tags |
trusty |
apport-collected trusty |
|
| 2019-05-17 16:06:23 |
Steve Beattie |
description |
When nested kvm virtualization is used (with host-passthrough), if the first level guest is a trusty vm, odd behavior is seen in the second level guest:
host os:
disco/5.0.0-15.16-generic/qemu 1:3.1+dfsg-2ubuntu3.1
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT vulnerable
1st level vm:
trusty/4.4.0-148.174~14.04.1-generic/qemu 2.0.0+dfsg-2ubuntu1.46
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Not affected
This behavior is not seen when the first level guest is a xenial or bionic vm (same bare metal hardware):
1st level vm:
bionic/4.15.0-50.54-generic/qemu 1:2.11+dfsg-1ubuntu7.13
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
and:
1st level vm:
xenial/4.4.0-148.174-generic/qemu 1:2.5+dfsg-5ubuntu10.39
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
It's not clear whether this is an issue with linux/kvm or qemu in trusty. |
When nested kvm virtualization is used (with host-passthrough), if the first level guest is a trusty vm, odd behavior is seen in the second level guest:
host os:
disco/5.0.0-15.16-generic/qemu 1:3.1+dfsg-2ubuntu3.1
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT vulnerable
1st level vm:
trusty/4.4.0-148.174~14.04.1-generic/qemu 2.0.0+dfsg-2ubuntu1.46
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Not affected
This behavior is not seen when the first level guest is a xenial or bionic vm (same bare metal hardware):
1st level vm:
bionic/4.15.0-50.54-generic/qemu 1:2.11+dfsg-1ubuntu7.13
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
and:
1st level vm:
xenial/4.4.0-148.174-generic/qemu 1:2.5+dfsg-5ubuntu10.39
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
2nd level vm:
bionic/4.15.0-50.54-generic
contents of /sys/devices/system/cpu/vulnerabilities/mds:
Mitigation: Clear CPU buffers; SMT Host state unknown
It's not clear whether this is an issue with linux/kvm or qemu in trusty.
---
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 2239 F.... pulseaudio
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=4fa9460d-7ed4-49db-8e22-86a5107d0062
InstallationDate: Installed on 2019-02-14 (92 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
Package: qemu 2.0.0+dfsg-2ubuntu1.46
PackageArchitecture: amd64
ProcEnviron:
TERM=screen
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 qxldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-148-generic root=UUID=9a35107e-83fa-4010-81e1-235a4ea14fe6 ro quiet splash vt.handoff=7
ProcVersionSignature: User Name 4.4.0-148.174~14.04.1-generic 4.4.177
RelatedPackageVersions:
linux-restricted-modules-4.4.0-148-generic N/A
linux-backports-modules-4.4.0-148-generic N/A
linux-firmware 1.127.24
RfKill:
Tags: trusty trusty
Uname: Linux 4.4.0-148-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.12.0-1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-bionic
dmi.modalias: dmi:bvnSeaBIOS:bvr1.12.0-1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-bionic:cvnQEMU:ct1:cvrpc-i440fx-bionic:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-bionic
dmi.sys.vendor: QEMU |
|
| 2019-05-17 16:06:24 |
Steve Beattie |
attachment added |
|
AlsaInfo.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264540/+files/AlsaInfo.txt |
|
| 2019-05-17 16:06:26 |
Steve Beattie |
attachment added |
|
BootDmesg.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264541/+files/BootDmesg.txt |
|
| 2019-05-17 16:06:27 |
Steve Beattie |
attachment added |
|
CRDA.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264542/+files/CRDA.txt |
|
| 2019-05-17 16:06:29 |
Steve Beattie |
attachment added |
|
CurrentDmesg.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264543/+files/CurrentDmesg.txt |
|
| 2019-05-17 16:06:31 |
Steve Beattie |
attachment added |
|
Dependencies.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264544/+files/Dependencies.txt |
|
| 2019-05-17 16:06:32 |
Steve Beattie |
attachment added |
|
IwConfig.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264545/+files/IwConfig.txt |
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| 2019-05-17 16:06:34 |
Steve Beattie |
attachment added |
|
Lspci.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264546/+files/Lspci.txt |
|
| 2019-05-17 16:06:35 |
Steve Beattie |
attachment added |
|
ProcCpuinfoMinimal.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264547/+files/ProcCpuinfoMinimal.txt |
|
| 2019-05-17 16:06:37 |
Steve Beattie |
attachment added |
|
ProcInterrupts.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264548/+files/ProcInterrupts.txt |
|
| 2019-05-17 16:06:38 |
Steve Beattie |
attachment added |
|
ProcModules.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264549/+files/ProcModules.txt |
|
| 2019-05-17 16:06:40 |
Steve Beattie |
attachment added |
|
PulseList.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264550/+files/PulseList.txt |
|
| 2019-05-17 16:06:43 |
Steve Beattie |
attachment added |
|
UdevDb.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264551/+files/UdevDb.txt |
|
| 2019-05-17 16:06:46 |
Steve Beattie |
attachment added |
|
UdevLog.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264552/+files/UdevLog.txt |
|
| 2019-05-17 16:06:48 |
Steve Beattie |
attachment added |
|
WifiSyslog.txt https://bugs.launchpad.net/bugs/1829555/+attachment/5264553/+files/WifiSyslog.txt |
|
| 2019-05-17 16:07:44 |
Steve Beattie |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2019-05-20 21:38:57 |
Terry Rudd |
bug |
|
|
added subscriber Terry Rudd |
| 2019-05-21 08:42:52 |
Christian Ehrhardt |
qemu (Ubuntu): status |
New |
Confirmed |
|
| 2019-05-21 14:30:05 |
Christian Ehrhardt |
attachment added |
|
bisect-mds-fail-old-kernels.tgz https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829555/+attachment/5265295/+files/bisect-mds-fail-old-kernels.tgz |
|
| 2019-05-21 15:24:00 |
Christian Ehrhardt |
qemu (Ubuntu): importance |
Undecided |
Low |
|
