Also hit this issue on qemu-kvm-3.1.0-15.module+el8+2792+e33e01a0.x86_64, when do block_resize on a re-start qcow2 image(which has a bitmap created before hard shutdown)
*** Bug 1717161 has been marked as a duplicate of this bug. ***
Verified it on qemu-kvm-4.1.0-1.module+el8.1.0+3966+4a23dca1.x86_64, the problem has been resolved, set bug's status to "Verified". Test steps: 1.Start guest with qemu cmd, in guest, format data disk. /usr/libexec/qemu-kvm \ -name 'avocado-vt-vm1' \ -machine pc \ -nodefaults \ -device VGA,bus=pci.0,addr=0x2 \ -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1-20190123-032240-rOoB4cgD,server,nowait \ -mon chardev=qmp_id_qmpmonitor1,mode=control \ -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor-20190123-032240-rOoB4cgD,server,nowait \ -mon chardev=qmp_id_catch_monitor,mode=control \ -device pvpanic,ioport=0x505,id=id8Ec4Bn \ -chardev socket,id=serial_id_serial0,path=/var/tmp/serial-serial0-20190123-032240-rOoB4cgD,server,nowait \ -device isa-serial,chardev=serial_id_serial0 \ -chardev socket,id=seabioslog_id_20190123-032240-rOoB4cgD,path=/var/tmp/seabios-20190123-032240-rOoB4cgD,server,nowait \ -device isa-debugcon,chardev=seabioslog_id_20190123-032240-rOoB4cgD,iobase=0x402 \ -device ich9-usb-ehci1,id=usb1,addr=0x1d.7,multifunction=on,bus=pci.0 \ -device ich9-usb-uhci1,id=usb1.0,multifunction=on,masterbus=usb1.0,addr=0x1d.0,firstport=0,bus=pci.0 \ -device ich9-usb-uhci2,id=usb1.1,multifunction=on,masterbus=usb1.0,addr=0x1d.2,firstport=2,bus=pci.0 \ -device ich9-usb-uhci3,id=usb1.2,multifunction=on,masterbus=usb1.0,addr=0x1d.4,firstport=4,bus=pci.0 \ -object iothread,id=iothread0 \ -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2 \ -device virtio-blk-pci,id=image1,drive=drive_image1,bus=pci.0,iothread=iothread0 \ -drive id=drive_data1,if=none,snapshot=off,aio=native,cache=none,format=qcow2,file=/home/data1.qcow2 \ -device virtio-blk-pci,id=data1,drive=drive_data1,bus=pci.0,iothread=iothread0 \ -device virtio-net-pci,mac=9a:39:3a:3b:3c:3d,id=id1JNQsL,vectors=4,netdev=idVpZZ6A,bus=pci.0 \ -netdev tap,id=idVpZZ6A,vhost=on \ -m 4096 \ -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \ -cpu host,+kvm_pv_unhalt \ -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \ -vnc :0 \ -rtc base=utc,clock=host,driftfix=slew \ -boot order=cdn,once=c,menu=off,strict=off \ -enable-kvm \ -monitor stdio \ -qmp tcp:0:3000,server,nowait \ (guest)#fdisk /dev/vdb #mkfs.ext4 /dev/vdb #mount /dev/vdb /mnt #cd /mnt 2. Add persistent bitmap to data disk, and check bitmap info: { "execute": "block-dirty-bitmap-add", "arguments": {"node": "drive_data1", "name": "bitmap0","persistent":true}} 3. Add new file to data disk,check bitmap info (guest)# dd if=/dev/urandom of=test bs=1M count=1000 {"execute":"query-block"} {"return": [{"io-status": "ok", "device": "drive_image1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 21474836480, "filename": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 4905029632, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block156", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/image1/virtio-backend", "type": "unknown"}, {"io-status": "ok", "device": "drive_data1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 2147483648, "filename": "/home/data1.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 1117462528, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block301", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/data1.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/data1/virtio-backend", "dirty-bitmaps": [{"name": "bitmap0", "recording": true, "persistent": true, "busy": false, "status": "active", "granularity": 65536, "count": 1049165824}], "type": "unknown"}]} 4. Quit vm, resize data disk size to 3G, then check image info (qemu)quit #qemu-img resize /home/data1.qcow2 3G #qemu-img info /home/data1.qcow2 image: /home/data1.qcow2 file format: qcow2 virtual size: 3 GiB (3221225472 bytes) disk size: 1.04 GiB cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false bitmaps: [0]: flags: [0]: auto name: bitmap0 granularity: 65536 refcount bits: 16 corrupt: false 5.Start vm again, resize bitmap info to 4T, check image info by query-block {"execute":"block_resize","arguments":{"device":"drive_data1","size":4398046511104}} {"execute":"query-block"} {"return": [{"io-status": "ok", "device": "drive_image1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 21474836480, "filename": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 4905029632, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block119", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/image1/virtio-backend", "type": "unknown"}, {"io-status": "ok", "device": "drive_data1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 4398046511104, "filename": "/home/data1.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 1117794304, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "bitmaps": [{"flags": ["in-use", "auto"], "name": "bitmap0", "granularity": 65536}], "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block310", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/data1.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/data1/virtio-backend", "dirty-bitmaps": [{"name": "bitmap0", "recording": true, "persistent": true, "busy": false, "status": "active", "granularity": 65536, "count": 1049165824}], "type": "unknown"}]} 6. Quit vm, shrink data disk size to 4G,check image info #qemu-img resize /home/data1.qcow2 4G --shrink #qemu-img info /home/data1.qcow2 image: /home/data1.qcow2 file format: qcow2 virtual size: 4 GiB (4294967296 bytes) disk size: 1.04 GiB cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false bitmaps: [0]: flags: [0]: auto name: bitmap0 granularity: 65536 refcount bits: 16 corrupt: false 7.Start vm again, shrink data disk size to 2G, check image info {"execute":"block_resize","arguments":{"device":"drive_data1","size":2147483648}} {"execute":"query-block"} {"return": [{"io-status": "ok", "device": "drive_image1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 21474836480, "filename": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 4905029632, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block198", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/image1/virtio-backend", "type": "unknown"}, {"io-status": "ok", "device": "drive_data1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 2147483648, "filename": "/home/data1.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 1117597696, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "bitmaps": [{"flags": ["in-use", "auto"], "name": "bitmap0", "granularity": 65536}], "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block363", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/data1.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/data1/virtio-backend", "dirty-bitmaps": [{"name": "bitmap0", "recording": true, "persistent": true, "busy": false, "status": "active", "granularity": 65536, "count": 1049165824}], "type": "unknown"}]} 8. Add a new file to data disk, check bitmap info (guest)# dd if=/dev/urandom of=te bs=1M count=1000 {"execute":"query-block"} {"return": [{"io-status": "ok", "device": "drive_image1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 21474836480, "filename": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 4905021440, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block198", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/kvm_autotest_root/images/rhel810-64-virtio-scsi.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/image1/virtio-backend", "type": "unknown"}, {"io-status": "ok", "device": "drive_data1", "locked": false, "removable": false, "inserted": {"iops_rd": 0, "detect_zeroes": "off", "image": {"virtual-size": 2147483648, "filename": "/home/data1.qcow2", "cluster-size": 65536, "format": "qcow2", "actual-size": 2076127232, "format-specific": {"type": "qcow2", "data": {"compat": "1.1", "lazy-refcounts": false, "bitmaps": [{"flags": ["in-use", "auto"], "name": "bitmap0", "granularity": 65536}], "refcount-bits": 16, "corrupt": false}}, "dirty-flag": false}, "iops_wr": 0, "ro": false, "node-name": "#block363", "backing_file_depth": 0, "drv": "qcow2", "iops": 0, "bps_wr": 0, "write_threshold": 0, "encrypted": false, "bps": 0, "bps_rd": 0, "cache": {"no-flush": false, "direct": true, "writeback": true}, "file": "/home/data1.qcow2", "encryption_key_missing": false}, "qdev": "/machine/peripheral/data1/virtio-backend", "dirty-bitmaps": [{"name": "bitmap0", "recording": true, "persistent": true, "busy": false, "status": "active", "granularity": 65536, "count": 2024210432}], "type": "unknown"}]} 9. Quit vm, check data disk image info: #qemu-img info /home/data1.qcow2 image: /home/data1.qcow2 file format: qcow2 virtual size: 2 GiB (2147483648 bytes) disk size: 1.93 GiB cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false bitmaps: [0]: flags: [0]: auto name: bitmap0 granularity: 65536 refcount bits: 16 corrupt: false
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:3723