It is not a KVM bug, it is a bridge bug, affecting adding and removing interfaces from the bridge. qemu-ifup and qemu-ifdown do so, and generates the bug, but it is not Windows or Linux VM related, not either KVM related...
It is not a KVM bug, it is a bridge bug, affecting adding and removing interfaces from the bridge. qemu-ifup and qemu-ifdown do so, and generates the bug, but it is not Windows or Linux VM related, not either KVM related...