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mirror of https://gitlab.com/libvirt/libvirt.git synced 2025-04-01 20:05:19 +00:00
Ján Tomko 92b252456e check for NULL before calling g_regex_unref
g_regex_unref reports an error if called with a NULL argument.

We have two cases in the code where we (possibly) call it on a NULL
argument. The interesting one is in virDomainQemuMonitorEventCleanup.

Based on VIR_CONNECT_DOMAIN_QEMU_MONITOR_EVENT_REGISTER_REGEX, we unref
data->regex, which has two problems:

* On the client side, flags is -1 so the comparison is true even if no
  regex was used, reproducible by:
  $ virsh qemu-monitor-event --timeout 1
  which results in an ugly error:
(process:1289846): GLib-CRITICAL **: 14:58:42.631: g_regex_unref: assertion 'regex != NULL' failed
* On the server side, we only create the regex if both the flag and the
  string are present, so it's possible to trigger this message by:
  $ virsh qemu-monitor-event --regex --timeout 1

Use a non-NULL comparison instead of the flag to decide whether we need
to unref the regex. And add a non-NULL check to the unref in the
VirtualBox test too.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Fixes: 71efb59a4de7c51b1bc889a316f1796ebf55738f
https://bugzilla.redhat.com/show_bug.cgi?id=1876907
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
2020-09-08 16:07:47 +02:00
2019-05-31 17:54:28 +02:00
2020-09-01 13:22:24 +02:00
2019-09-06 12:47:46 +02:00
2020-01-16 13:04:11 +00:00
2019-06-07 13:18:08 +02:00
2020-08-03 13:54:15 +02:00
2020-08-03 09:26:48 +02:00
2019-10-18 17:32:52 +02:00
2015-06-16 13:46:20 +02:00
2020-06-17 12:59:08 +02:00
2020-08-03 15:08:28 +02:00
2020-09-01 21:58:46 +02:00

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Libvirt API for virtualization

Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.

For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.

Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.

Further information about the libvirt project can be found on the website:

https://libvirt.org

License

The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.

Installation

Instructions on building and installing libvirt can be found on the website:

https://libvirt.org/compiling.html

Contributing

The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:

https://libvirt.org/contribute.html

Contact

The libvirt project has two primary mailing lists:

Further details on contacting the project are available on the website:

https://libvirt.org/contact.html

Description
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
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