QEMU crashed after last update

[BertN45]

After the last update QEMU crashed starting Ubuntu 14.04. In older versions of QEMU it did work correctly.

For the error see my screenshot too.

Text was:
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 101, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 57, in newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/object/domain.py", line 1329, in startup
    self._backend.create()
  File "/usr/lib/python3/dist-packages/libvirt.py", line 1234, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: qemu 1:5.2+dfsg-2ubuntu1
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu55
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 17 17:14:11 2020
Dependencies:

InstallationDate: Installed on 2020-11-05 (42 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20201104)
KvmCmdLine: COMMAND STAT EUID RUID PID PPID %CPU COMMAND
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
 /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
 /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 480M
     |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
MachineType: innotek GmbH VirtualBox
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-25-generic root=UUID=f006813e-07c3-453b-81f2-eda88f4d1667 ro quiet splash
SourcePackage: qemu
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.board.name: VirtualBox
dmi.board.vendor: Oracle Corporation
dmi.board.version: 1.2
dmi.chassis.type: 1
dmi.chassis.vendor: Oracle Corporation
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
dmi.product.family: Virtual Machine
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH

[Dan Streetman (ddstreet)]

it appears to have crashed:
[ 47.344271] qemu-system-x86[4696]: segfault at 28 ip 000055d785304bcc sp 00007ffc93183670 error 6 in qemu-system-x86_64[55d7852e2000+4d5000]
[ 47.344281] Code: 00 48 8d 3d 2d db 56 00 48 8b 08 31 c0 e8 3c bc ff ff 4c 8b 2d 85 29 89 00 e9 42 ff ff ff 48 8d 3d a5 4b 61 00 e8 24 bb ff ff <c7> 40 28 01 00 00 00 e9 73 fc ff ff 48 8d 35 71 50 4b 00 48 8d 3d

can you attach the coredump?

[BertN45 (lammert-nijhof)]

The core dump of virtmanage, first time I generated a core dump. I hope it s OK.

[Christian Ehrhardt  (paelzer)]

Hi BertN45 - thanks for the report.

It looks familiar - like a crash due to some over-excessive module splitting.
Some spice code now needs the package qemu-system-gui.
=> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978131

That will be fixed in the upcoming version that is rebased on 5.2-3 containing the fix for

Your package listing confirms that in your case qemu-system-gui isn't installed.
Until I have merged in the fix for this you should be able to get around this issue by installing qemu-system-gui.

Please let me know if it still crashes after installing qemu-system-gui.

[Christian Ehrhardt  (paelzer)]

Review and pre-tests ok, uploaded to 21.04

[Launchpad Janitor (janitor)]

This bug was fixed in the package qemu - 1:5.2+dfsg-3ubuntu1

---------------
qemu (1:5.2+dfsg-3ubuntu1) hirsute; urgency=medium

  * Merge with Debian unstable, includes fixes for
    - qemu-user-static are partially dynamically linked (LP: #1908331)
    - qemu crashing when using spice without qemu-system-gui being
      installed (LP: #1908577)
    Remaining changes:
    - qemu-kvm to systemd unit
      - d/qemu-kvm-init: script for QEMU KVM preparation modules, ksm,
        hugepages and architecture specifics
      - d/qemu-system-common.qemu-kvm.service: systemd unit to call
        qemu-kvm-init
      - d/qemu-system-common.install: install helper script
      - d/qemu-system-common.qemu-kvm.default: defaults for
        /etc/default/qemu-kvm
      - d/rules: call dh_installinit and dh_installsystemd for qemu-kvm
    - Distribution specific machine type (LP: 1304107 1621042)
      - d/p/ubuntu/define-ubuntu-machine-types.patch: distro machine types
      - d/qemu-system-x86.NEWS Info on fixed machine type definitions
        for host-phys-bits=true (LP: 1776189)
      - add an info about -hpb machine type in debian/qemu-system-x86.NEWS
      - provide pseries-bionic-2.11-sxxm type as convenience with all
        meltdown/spectre workarounds enabled by default. (LP: 1761372).
      - ubuntu-q35 alias added to auto-select the most recent q35 ubuntu type
    - Enable nesting by default
      - d/p/ubuntu/enable-svm-by-default.patch: Enable nested svm by default
        in qemu64 on amd
        [ No more strictly needed, but required for backward compatibility ]
    - improved dependencies
      - Make qemu-system-common depend on qemu-block-extra
      - Make qemu-utils depend on qemu-block-extra
      - let qemu-utils recommend sharutils
    - tolerate ipxe size change on migrations to >=18.04 (LP: 1713490)
      - d/p/ubuntu/pre-bionic-256k-ipxe-efi-roms.patch: old machine types
        reference 256k path
      - d/control-in: depend on ipxe-qemu-256k-compat-efi-roms to be able to
        handle incoming migrations from former releases.
    - d/control-in: Disable capstone disassembler library support (universe)
    - d/qemu-system-x86.README.Debian: add info about updated nesting changes
    - d/control*, d/rules: disable xen by default, but provide universe
      package qemu-system-x86-xen as alternative
      [includes compat links changes of 5.0-5ubuntu4]
    - allow qemu to load old modules post upgrade (LP 1847361)
      - Drop d/qemu-block-extra.*.in, d/qemu-system-gui.*.in
      - d/rules: Drop generating package version into maintainer scripts
      - d/qemu-system-gui.prerm: add no-op prerm to overcome upgrade issues on
        the bad old prerm (LP 1906245 1905377)
    - d/p/ubuntu/lp-1907789-build-no-pie-is-no-functional-liker-flag.patch: fix
      ld usage of -no-pie (LP 1907789)

 -- Christian Ehrhardt <email address hidden> Tue, 05 Jan 2021 12:43:42 +0100