Kernel Oops - unable to handle kernel paging request; when starting libvirtd

[koen_92]

Kernel Oops occur as soon as I start the libvirtd daemon (/usr/bin/libvirtd from package libvirt-bin). This happens only on this system (MS-7640/990XA-GD55), but it happens every time I try to start libvirtd. Creating/Starting a VM is not needed to trigger this oops.

libvirtd will hang forever after starting: interaction with libvirtd isn't possible (i.e. the command 'virsh' will also hang forever).

I also tried a new mainline kernel (linux-image-4.1.3-040103-generic_4.1.3-040103.201507220129_amd64), but that gives the same problem.

Steps to reproduce:
1. Boot Linux on this hardware
2. run libvirtd

I ran a memtest, which gave no errors.

Kernel cmdline: ro quiet splash iommu=pt iommu=1
CPU: AMD FX(tm)-4100 Quad-Core Processor
Kernel: Ubuntu 3.13.0-59.98-generic 3.13.11-ckt22 (but also happens on 4.1+)
Ubuntu version: 14.04.2

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-59-generic 3.13.0-59.98
ProcVersionSignature: Ubuntu 3.13.0-59.98-generic 3.13.11-ckt22
Uname: Linux 3.13.0-59-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/by-id', '/dev/snd/controlC1', '/dev/snd/pcmC1D0c', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D2c', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Mon Jul 27 20:59:40 2015
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: MSI MS-7640
ProcFB:

ProcKernelCmdLine: root=UUID=7be2b569-ee1b-4dd2-b8a5-99398f731235 ro quiet splash iommu=pt iommu=1
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-59-generic N/A
 linux-backports-modules-3.13.0-59-generic N/A
 linux-firmware 1.127.13
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/06/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V23.2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: 990XA-GD55 (MS-7640)
dmi.board.vendor: MSI
dmi.board.version: 4.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 4.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV23.2:bd03/06/2013:svnMSI:pnMS-7640:pvr4.0:rvnMSI:rn990XA-GD55(MS-7640):rvr4.0:cvnMSI:ct3:cvr4.0:
dmi.product.name: MS-7640
dmi.product.version: 4.0
dmi.sys.vendor: MSI

[Brad Figg (brad-figg)]

This change was made by a bot.

[Chris J Arges (arges)]

1) Does this happen even with a clean libvirt install? I.e. install Ubuntu, then install ubuntu-virt-server and see if the crashes happen on libvirtd starting?
2) You could get a crashdump of this when it happens. This may let us know which string is causing the oops and what led up to it.
https://wiki.ubuntu.com/Kernel/CrashdumpRecipe

--chris

[koen_92 (koenvaningen)]

I reinstalled Ubuntu server 14.04.2 (which was delivered with 3.16), applied all the updates and installed ubuntu-virt-server. And now seems everything to be fine! I even copied over the old configuration/xml files to this new system, and still no kernel oops.

So now I don't know what could have happened? Silent disk corruption?

At least I'm not able to reproduce this bug in a completely clean system, so I'm closing the bug now.

Thanks for your suggestions!