id = 2756
title = "Unexpected port id 2909357808 for device virtio-serial0.0"
state = "opened"
created_at = "2024-12-29T14:30:04.433Z"
closed_at = "n/a"
labels = ["device:virtio"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2756"
host-os = "centos8"
host-arch = "x86"
qemu-version = "6.2.0"
guest-os = "Windows 10"
guest-arch = "x86"
description = """when the VM runs for a period of time.qemu log always print the error：“Unexpected port id 2909357808 for device virtio-serial0.0”.And the spice connet display black screen.Restart the vm,it recovery. my channel is 16,Normally it will always output port less than 16,but when error it report a lage port. why it get a lage port "2909357808",Is there a data overflow?"""
reproduce = """1.The VM runs for a period of time

2.report the error: "Unexpected port id 2909357808 for device virtio-serial0.0".

3.restart to recovery."""
additional = """qemu log:

when vm is ok:
```
virtio serial port 16 send control message event = 1, value = 1
virtio serial port 0 send control message event = 1, value = 1
virtio serial port '1' handle control message event = 3, value = 1
virtio serial port '2' handle control message event = 3, value = 1
virtio serial port 2 send control message event = 6, value = 1
virtio serial port '3' handle control message event = 3, value = 1
virtio serial port 3 send control message event = 6, value = 1
virtio serial port '4' handle control message event = 3, value = 1
virtio serial port 4 send control message event = 6, value = 1
```


when error:

```
2024-11-07T07:19:50.969383Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2909357808 for device virtio-serial0.0
virtio serial port '2400366800' handle control message event = 49671, value = 65535
2024-11-07T07:19:50.969706Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2400366800 for device virtio-serial0.0
virtio serial port '2909357808' handle control message event = 52747, value = 65535
2024-11-07T07:20:00.944495Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2909357808 for device virtio-serial0.0
virtio serial port '2400366800' handle control message event = 49671, value = 65535
2024-11-07T07:20:00.950544Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2400366800 for device virtio-serial0.0
virtio serial port '2909357808' handle control message event = 52747, value = 65535
2024-11-07T07:20:47.923564Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2909357808 for device virtio-serial0.0
virtio serial port '2400366800' handle control message event = 49671, value = 65535
2024-11-07T07:20:47.924422Z qemu-system-x86_64: virtio-serial-bus: Unexpected port id 2400366800 for device virtio-serial0.0
virtio serial port '2909357808' handle control message event = 52747, value = 65535
```"""