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[virtual network][rhel9][vdpa]Booting the guest with the vdpa device, hot unplugging it and then hot plugging it again, rebooting the guest causes qemu core dump
Description of problem:
Booting the guest with the vdpa device, hot unplugging it and then hot plugging it again, rebooting the guest causes qemu core dump
Version-Release number of selected component (if applicable):
qemu-kvm-6.2.0-10.el9.x86_64
kernel-5.14.0-68.mr552_220223_1400.el9.x86_64
git clone https://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git
vdpa-Add-support-to-configure-max-number-of-VQs.patch
vdpa-Remove-unsupported-command-line-option.patch
virtio-Define-bit-numbers-for-device-independent-fea.patch
# flint -d 0000:3b:00.0 q
Image type: FS4
FW Version: 22.32.2004
FW Release Date: 13.1.2022
Product Version: 22.32.2004
Rom Info: type=UEFI version=14.25.18 cpu=AMD64,AARCH64
type=PXE version=3.6.502 cpu=AMD64
Description: UID GuidsNumber
Base GUID: b8cef603000a110c 4
Base MAC: b8cef60a110c 4
Image VSD: N/A
Device VSD: N/A
PSID: MT_0000000359
Security Attributes: N/A
How reproducible:
Only once so far
Unfortunately, I only encountered it onceļ¼and no qemu core dump information was captured. In the process of continuous reproduction, I encountered another: Bug 2059799. Although the steps of the two bug tests are exactly the same, they do cause different results.
When qemu core dump occurs, qemu output:
qemu-kvm: ../hw/virtio/vhost-vdpa.c:560: int vhost_vdpa_get_vq_index(struct vhost_dev *, int): Assertion `idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs' failed.
Please feel free to connect me if you have any test need to be done.
Steps to Reproduce:
1.
2.
3.
Actual results:
Expected results:
Additional info:
(In reply to lulu from comment #2)
> Hi lei,
> would you help try to reproduce this issue in kernel-5.14.0-68.el9.x86_64?
> I wonder if this is an issue in mlx driver,
> here is the bug in rhel8.6
> https://bugzilla.redhat.com/show_bug.cgi?id=2048060
> this bug has the same assert, this issue was fixed by the MR to sync the mlx
> driver
> https://gitlab.com/redhat/rhel/src/kernel/rhel-8/-/merge_requests/1974
>
> thanks
> Cindy
Hello Cindy
I tried to test on kernel-5.14.0-68.el9.x86_64, doesn't reprodue this bug. Therefore the current bug should be the same issue as bug 2048060.
Test Version:
kernel-5.14.0-68.el9.x86_64
qemu-kvm-6.2.0-10.el9.x86_64
Best Regards
Lei