Hi Matthew Ruffell
First of all, thank you for your response.
If you want to reproduce this issue, you can try the following steps:
1. Boot the Ubuntu 24 system and modify the kernel boot parameters to
include virtio_pci.force_legacy=1.
2. Use perf-tools or ftrace to trace the return value of the
virtio_pci_legacy_probe function.
3. Insert a virtio network card or disk, and observe the return value
of the virtio_pci_legacy_probe function within the guest OS to confirm a
successful return of 0x0, indicating that the virtio device has been enabled
using virtio_pci_legacy_probe.
4. Remove the network card or disk, and you should be able to reproduce
the issue.
I have installed and tested the test kernel you built on Ubuntu 24, and
it's working fine. Additionally, I have also backported the patch from
https://github.com/torvalds/linux/commit/c8fae27d141a32a1624d0d0d5419d94252824498
(virtio-pci: Check if is_avq is NULL) and compiled the Ubuntu kernel,
which also has no issues.
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https://bugs.launchpad.net/bugs/2067862
Title:
remove virtio legacy device make kernel Oops
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