What were you trying to do that didn't work?

boot windows VM with multiple chardev.

Please provide the package NVR for which bug is seen:

qemu-kvm-8.2.0-4.el9
kernel-5.14.0-417.el9.x86_64
swtpm-0.8.0-1.el9.x86_64

Steps to reproduce

1. boot VM with multiple chardev for vioser.

Expected results

VM run well.

Actual results

qemu crash:
[stdlog] 2024-02-05 10:16:44,415 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:44,417 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:44,599 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:44,600 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:44,764 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:44,764 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:44,918 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:44,919 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,074 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,074 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,238 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,238 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,388 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,389 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,542 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,542 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,686 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,686 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,830 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,830 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:45,961 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:45,962 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:46,106 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:46,106 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:46,234 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_set_host_notifier: unable to init event notifier: Too many open files (-24)
[stdlog] 2024-02-05 10:16:46,234 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).
[stdlog] 2024-02-05 10:16:55,912 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio-scsi: Failed to set guest notifiers (-24), ensure -accel kvm is set.
[stdlog] 2024-02-05 10:16:55,913 avocado.virttest.qemu_vm client           L0620 INFO | [qemu output] qemu-kvm: virtio_bus_start_ioeventfd: failed. Fallback to userspace (slower).