[Pkg-libvirt-maintainers] Bug#1112273: Bug#1112273: qemu-system: rpc-libvirtd segfaults in combination with qemu 10.1.0+ds-1

[David Brown]

On 8/28/25 9:42 PM, Andrea Bolognani wrote:
> On Thu, Aug 28, 2025 at 09:48:45AM +0200, David Brown wrote:
>> On 8/28/25 9:39 AM, Michael Tokarev wrote:
>>> Reassigning this bug to libvirt.  Unfortunately there's no indication
>>> which version of libvirt you're using, hopefully it's the one in sid?
>>
>> Thanks, I am using 11.3.0-3+b1 of libvirt-daemon.
> 
> This looks odd: there is no 11.3.0-3+b1 in Debian. Have you rebuilt
> libvirt locally? Perhaps including custom changes?
> 
>>> This is an issue in libvirt, not qemu, - it is the one who segfaults,
>>> and it definitely should not crash.
> 
> Agreed. Can you try installing libvirt 11.6.0-1 from experimental and
> see whether the issue still reproduces? Alternatively, 11.7.0-1
> should come to unstable in a week or so. Since there's a non-zero
> chance that the issue has already been identified and addressed
> upstream, I'm not too eager to start debugging this very second :)
> 

For reasons I don't quite understand, the issue appears to have solved 
itself. Just for testing purposes, I re-installed qemu 10.1.0+ds-1 and 
now the segfaults upon connecting to qemu://system with virt-manager do 
not happen anymore.

I currently have the following versions of qemu and libvirt installed:

dpkg -l | grep -E '(^ii  libvirt|^ii  qemu)'
ii  libvirt-clients                         11.3.0-3+b1 
             amd64        virtualization library - clients
ii  libvirt-common                          11.3.0-3+b1 
             amd64        virtualization library - common files
ii  libvirt-daemon                          11.3.0-3+b1 
             amd64        virtualization daemon
ii  libvirt-daemon-common                   11.3.0-3+b1 
             amd64        virtualization daemon - common files
ii  libvirt-daemon-config-network           11.3.0-3 
             all          virtualization daemon - configuration files 
(default network)
ii  libvirt-daemon-config-nwfilter          11.3.0-3 
             all          virtualization daemon - configuration files 
(default network filters)
ii  libvirt-daemon-driver-interface         11.3.0-3+b1 
             amd64        virtualization daemon - interface driver
ii  libvirt-daemon-driver-lxc               11.3.0-3+b1 
             amd64        virtualization daemon - LXC connection driver
ii  libvirt-daemon-driver-network           11.3.0-3+b1 
             amd64        virtualization daemon - network driver
ii  libvirt-daemon-driver-nodedev           11.3.0-3+b1 
             amd64        virtualization daemon - node device (nodedev) 
driver
ii  libvirt-daemon-driver-nwfilter          11.3.0-3+b1 
             amd64        virtualization daemon - network filter 
(nwfilter) driver
ii  libvirt-daemon-driver-qemu              11.3.0-3+b1 
             amd64        virtualization daemon - QEMU connection driver
ii  libvirt-daemon-driver-secret            11.3.0-3+b1 
             amd64        virtualization daemon - secret driver
ii  libvirt-daemon-driver-storage           11.3.0-3+b1 
             amd64        virtualization daemon - storage driver
ii  libvirt-daemon-driver-storage-disk      11.3.0-3+b1 
             amd64        virtualization daemon - disk storage driver
ii  libvirt-daemon-driver-storage-logical   11.3.0-3+b1 
             amd64        virtualization daemon - Logical Volume Manager 
(LVM) storage driver
ii  libvirt-daemon-driver-storage-mpath     11.3.0-3+b1 
             amd64        virtualization daemon - multipath (mpath) 
storage driver
ii  libvirt-daemon-driver-storage-scsi      11.3.0-3+b1 
             amd64        virtualization daemon - SCSI storage driver
ii  libvirt-daemon-driver-vbox              11.3.0-3+b1 
             amd64        virtualization daemon - VirtualBox connection 
driver
ii  libvirt-daemon-lock                     11.3.0-3+b1 
             amd64        virtualization daemon - locking daemon
ii  libvirt-daemon-log                      11.3.0-3+b1 
             amd64        virtualization daemon - logging daemon
ii  libvirt-daemon-plugin-lockd             11.3.0-3+b1 
             amd64        virtualization daemon - locking plugin (virtlockd)
ii  libvirt-daemon-system                   11.3.0-3+b1 
             amd64        virtualization daemon - typical QEMU-based 
deployment
ii  libvirt-glib-1.0-0:amd64                5.0.0-2+b5 
             amd64        libvirt GLib and GObject mapping library
ii  libvirt-glib-1.0-data                   5.0.0-2 
             all          Common files for libvirt GLib library
ii  libvirt-l10n                            11.3.0-3 
             all          virtualization library - localization files
ii  libvirt0:amd64                          11.3.0-3+b1 
             amd64        virtualization library
ii  qemu-block-extra                        1:10.1.0+ds-1 
             amd64        extra block backend modules for qemu-system 
and qemu-utils
ii  qemu-system-common                      1:10.1.0+ds-1 
             amd64        QEMU full system emulation binaries (common files)
ii  qemu-system-data                        1:10.1.0+ds-1 
             all          QEMU full system emulation (data files)
ii  qemu-system-gui                         1:10.1.0+ds-1 
             amd64        QEMU full system emulation binaries (graphical 
display and audio modules)
ii  qemu-system-modules-opengl              1:10.1.0+ds-1 
             amd64        QEMU full system emulation binaries (OpenGL 
display modules)
ii  qemu-system-modules-spice               1:10.1.0+ds-1 
             amd64        QEMU full system emulation binaries (spice 
display modules)
ii  qemu-system-x86                         1:10.1.0+ds-1 
             amd64        QEMU full system emulation binaries (x86)
ii  qemu-utils                              1:10.1.0+ds-1 
             amd64        QEMU utilities

I can assist further in debugging if desired. Otherwise the bug can be 
closed.

Kind regards and thanks for your time,
David
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