If I run a KVM guest with a network using the vhost_net driver, I get a kernel oops with a NULL reference error. It happens randomly. I run a GPU passthrough setup with windows 10 but I can leave that up 24/7 as I am passing through a raw ethernet card. Any other virtual machine using the vhost_net driver will result in a crash in 12 hours or less. I've attached the dmesg that I captured with kdump. I am not sure when this bug was introduced.
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: luke 3876 F.... pulseaudio
/dev/snd/controlC1: luke 3876 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2018-10-30 (629 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_AU.UTF-8
SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-62-generic root=UUID=a5c9f5ef-18ed-4f8b-a213-2cec2e0bb4a5 ro iommu=1 amd_iommu=on kvm.ignore_msrs=1 kvm.report_ignored_msrs=0 kvm.allow_unsafe_assigned_interrupts=1 vfio_iommu_type1.allow_unsafe_interrupts=1 default_hugepagesz=1G hugepagesz=1G crashkernel=768M
ProcVersionSignature: Ubuntu 5.3.0-62.56~18.04.1-generic 5.3.18
RelatedPackageVersions:
linux-restricted-modules-5.3.0-62-generic N/A
linux-backports-modules-5.3.0-62-generic N/A
linux-firmware 1.173.19
Tags: bionic
Uname: Linux 5.3.0-62-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip kvm libvirt lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 08/27/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P3.70
dmi.board.name: X399 Professional Gaming
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.70:bd08/27/2019:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX399ProfessionalGaming:rvr:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1888324
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.