Bug 2080930

This is likely a regression. Kevin, can you take this one?

Reproduce win10-32 on

Red Hat Enterprise Linux release 9.1 Beta (Plow)
5.14.0-80.el9.x86_64
qemu-kvm-7.0.0-1.el9.x86_64
seabios-bin-1.16.0-1.el9.noarch
edk2-ovmf-20220221gitb24306f15d-1.el9.noarch
virtio-win-prewhql-0.1-215.iso

(not easy to reproduce with win2016/2019) 

Reference automation
python ConfigTest.py --testcase=unattended_install.cdrom.extra_cdrom_ks.default_install.aio_threads.q35 --guestname=Win10 --driveformat=virtio_blk --machines=q35 --platform=i386

Test steps:

1. qemu-img create -f qcow2 /home/kvm_autotest_root/images/win10-32-virtio.qcow2 30G

2.
/usr/libexec/qemu-kvm \
    -name 'avocado-vt-vm1'  \
    -sandbox on  \
    -machine q35,memory-backend=mem-machine_mem \
    -device pcie-root-port,id=pcie-root-port-0,multifunction=on,bus=pcie.0,addr=0x1,chassis=1 \
    -device pcie-pci-bridge,id=pcie-pci-bridge-0,addr=0x0,bus=pcie-root-port-0  \
    -nodefaults \
    -device VGA,bus=pcie.0,addr=0x2 \
    -m 30720 \
    -object memory-backend-ram,size=30720M,id=mem-machine_mem  \
    -smp 16,maxcpus=16,cores=8,threads=1,dies=1,sockets=2  \
    -cpu 'EPYC-Rome',hv_stimer,hv_synic,hv_vpindex,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_frequencies,hv_runtime,hv_tlbflush,hv_reenlightenment,hv_stimer_direct,hv_ipi,+kvm_pv_unhalt \
    \
    -device pcie-root-port,id=pcie-root-port-1,port=0x1,addr=0x1.0x1,bus=pcie.0,chassis=2 \
    -device qemu-xhci,id=usb1,bus=pcie-root-port-1,addr=0x0 \
    -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
    \
    -blockdev node-name=file_image1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/images/win10-32-virtio.qcow2,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_image1,driver=qcow2,read-only=off,cache.direct=on,cache.no-flush=off,file=file_image1 \
    -device pcie-root-port,id=pcie-root-port-2,port=0x2,addr=0x1.0x2,bus=pcie.0,chassis=3 \
    -device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,write-cache=on,serial=SYSTEM_DISK0,bus=pcie-root-port-2,addr=0x0  \
    \
    -device pcie-root-port,id=pcie-root-port-3,port=0x3,addr=0x1.0x3,bus=pcie.0,chassis=4 \
    -device virtio-net-pci,mac=9a:cd:03:13:22:a7,id=idTh7OfR,netdev=idPetRGr,bus=pcie-root-port-3,addr=0x0  \
    -netdev tap,id=idPetRGr,vhost=on \
    -blockdev node-name=file_cd1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/ISO/Win10/en_windows_10_business_editions_version_21h1_x86_dvd_1495793c.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_cd1,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_cd1 \
    -device ide-cd,id=cd1,drive=drive_cd1,bootindex=1,write-cache=on,bus=ide.0,unit=0 \
    -blockdev node-name=file_winutils,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/windows/winutils.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_winutils,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_winutils \
    -device ide-cd,id=winutils,drive=drive_winutils,bootindex=2,write-cache=on,bus=ide.1,unit=0 \
    -blockdev node-name=file_unattended,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/images/win10-32/autounattend.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_unattended,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_unattended \
    -device ide-cd,id=unattended,drive=drive_unattended,bootindex=3,write-cache=on,bus=ide.2,unit=0  \
    -vnc :5 \
    -monitor stdio \
    -qmp tcp:0:5955,server=on,wait=off \
    -rtc base=localtime,clock=host,driftfix=slew  \
    -boot menu=off,order=cdn,once=d,strict=off \
    -enable-kvm \
    -device pcie-root-port,id=pcie_extra_root_port_0,multifunction=on,bus=pcie.0,addr=0x3,chassis=5


after add queue-size=4,num-queues=1 on device virtio-blk-pci, the issue has gone.
-device virtio-blk-pci,id=image1,drive=drive_image1,bootindex=0,write-cache=on,serial=SYSTEM_DISK0,bus=pcie-root-port-2,addr=0x0,queue-size=4,num-queues=1 

Consolidate the wrong message and workaround，
It looks likes duplicate with Bug 2079938 - qemu coredump when boot with multi disks

Hi Kevin, please help to confirm it.

Yes. this looks like the same bug.

*** This bug has been marked as a duplicate of bug 2079938 ***