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Bug 2236353 - qemu crashed when migrate guest with blob resources enabled
Summary: qemu crashed when migrate guest with blob resources enabled
Keywords:
Status: CLOSED MIGRATED
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: qemu-kvm
Version: 9.4
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Marc-Andre Lureau
QA Contact: Guo, Zhiyi
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-08-31 03:21 UTC by Lili Zhu
Modified: 2023-09-25 16:53 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-09-22 18:15:41 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker   RHEL-7565 0 None Migrated None 2023-09-22 18:11:42 UTC
Red Hat Issue Tracker RHELPLAN-167343 0 None None None 2023-09-06 07:13:52 UTC

Description Lili Zhu 2023-08-31 03:21:48 UTC 
Description of problem:
qemu crashed when migrate guest with blob resources enabled


Version-Release number of selected component (if applicable):
libvirt-9.5.0-6.el9.x86_64
qemu-kvm-8.0.0-13.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1. prepare a guest with the following xml snippet
# virsh dumpxml lizhu --xpath //video
<video>
  <model type="virtio" heads="1" primary="yes" blob="on"/>
  <alias name="video0"/>
  <address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0"/>
</video>

2. migrate the guest to another host
# virsh migrate lizhu qemu+ssh://$target_host/system --verbose --live
Migration: [98.32 %]error: operation failed: domain is not running

3. check the qemu log on target host
#cat /var/log/libvirt/qemu/lizhu.log
...
2023-08-30 14:35:30.653+0000: Domain id=1 is tainted: host-cpu
char device redirected to /dev/pts/2 (label charserial0)
2023-08-30T14:35:37.352236Z qemu-kvm: Failed to load virtio-gpu:virtio-gpu
2023-08-30T14:35:37.352266Z qemu-kvm: error while loading state for
instance 0x0 of device '0000:00:01.0/virtio-gpu'
2023-08-30T14:35:37.352442Z qemu-kvm: load of migration failed: Invalid argument
2023-08-30 14:35:37.754+0000: shutting down, reason=crashed

4. check the qemu log on source host
#cat /var/log/libvirt/qemu/lizhu.log
...
2023-08-30 14:35:30.974+0000: initiating migration
2023-08-30 14:35:37.789+0000: shutting down, reason=crashed

5. check the guest states on source host
# virsh domstate lizhu --reason
shut off (unknown)

Actual results:
Migration failed, qemu crashed

Expected results:
Qemu should not crash.
Comment 1 Guo, Zhiyi 2023-09-06 11:22:59 UTC 
I think live migration should be blocked if blob is enabled
Comment 2 Marc-Andre Lureau 2023-09-06 13:09:28 UTC 
I sent a patch to the ML: "[PATCH] virtio-gpu: block migration of VMs with blob=true"

we will need future work to allow migration.
Comment 3 RHEL Program Management 2023-09-22 18:10:39 UTC 
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.
Comment 4 RHEL Program Management 2023-09-22 18:15:41 UTC 
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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