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Bug 2187133 - Two iTCO watchdogs should not be supported
Summary: Two iTCO watchdogs should not be supported
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libvirt
Version: 9.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Martin Kletzander
QA Contact: Lili Zhu
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-04-17 03:03 UTC by Lili Zhu
Modified: 2023-11-07 09:40 UTC (History)
6 users (show)

Fixed In Version: libvirt-9.3.0-1.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-11-07 08:31:17 UTC
Type: Bug
Target Upstream Version: 9.3.0
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-154818 0 None None None 2023-04-17 03:04:13 UTC
Red Hat Product Errata RHSA-2023:6409 0 None None None 2023-11-07 08:31:49 UTC

Description Lili Zhu 2023-04-17 03:03:43 UTC 
Description of problem:
Two iTCO watchdogs should be not supported

Version-Release number of selected component (if applicable):
libvirt-9.2.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Prepare a guest with the following xml snippet
    <watchdog model='itco' action='reset'>
      <alias name='watchdog0'/>
    </watchdog>
    <watchdog model='itco' action='reset'>
      <alias name='watchdog1'/>
    </watchdog>

2. define and start the guest
# virsh define avocado-vt-vm1.xml 
Domain 'avocado-vt-vm1' defined from avocado-vt-vm1.xml

# virsh start avocado-vt-vm1 
Domain 'avocado-vt-vm1' started


Actual results:
Guest with two itco watchdog can be started

Expected results:
Guest with two itco watchdog can not be started

Additional info:
Prepare a guest with 3 itco watchdog devices
# virsh define avocado-vt-vm1.xml 
error: Failed to define domain from avocado-vt-vm1.xml
error: unsupported configuration: Multiple iTCO watchdogs are not supported
Comment 1 Martin Kletzander 2023-04-19 14:29:30 UTC 
Patch series proposed upstream:

https://www.mail-archive.com/libvir-list@redhat.com/msg237398.html
Comment 2 Martin Kletzander 2023-04-20 08:54:29 UTC 
Fixed upstream with v9.2.0-268-gd56ddd0d19e3:

commit d56ddd0d19e34a8c0a7293473d8d4906e2590cd1
Author: Martin Kletzander <mkletzan>
Date:   Wed Apr 19 14:19:16 2023 +0200

    qemu: Check all watchdogs for iTCO duplicates
Comment 3 Lili Zhu 2023-05-08 07:49:34 UTC 
Tested this bug with:
libvirt-9.3.0-1.el9.x86_64

1. Prepare a guest with the following xml snippet
    <watchdog model='itco' action='reset'>
      <alias name='watchdog0'/>
    </watchdog>
    <watchdog model='itco' action='reset'>
      <alias name='watchdog1'/>
    </watchdog>

2. define the guest
# virsh define avocado-vt-vm1.xml 
error: Failed to define domain from avocado-vt-vm1.xml
error: unsupported configuration: domain can only have one watchdog with model 'itco'
Comment 6 Lili Zhu 2023-05-21 09:13:57 UTC 
Verified with:
libvirt-9.3.0-1.el9.x86_64

Scenario 1:
1. Prepare a guest with the following xml snippet
    <watchdog model='itco' action='reset'>
      <alias name='watchdog0'/>
    </watchdog>
    <watchdog model='itco' action='reset'>
      <alias name='watchdog1'/>
    </watchdog>

2. define the guest
# virsh define avocado-vt-vm1.xml 
error: Failed to define domain from avocado-vt-vm1.xml
error: unsupported configuration: domain can only have one watchdog with model 'itco'

Scenario 2:
1. Prepare a guest, check its xml about watchdog
# virsh dumpxml avocado-vt-vm1 --xpath //watchdog
<watchdog model="itco" action="reset">
  <alias name="watchdog0"/>
</watchdog>

2. coldplug a itco watchdog device
# virsh attach-device avocado-vt-vm1 watchdog.xml --config
error: Failed to attach device from watchdog.xml
error: Requested operation is not valid: device is already in the domain configuration

As the testing steps match with the expected ones, mark the bug as verified.
Comment 8 errata-xmlrpc 2023-11-07 08:31:17 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: libvirt security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:6409
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