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Bug 1439922
| Summary: | bdrv_co_do_copy_on_readv: Assertion `child->perm & (BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE)' failed. | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Richard W.M. Jones <rjones> | ||||
| Component: | qemu | Assignee: | Fedora Virtualization Maintainers <virt-maint> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | rawhide | CC: | amit, berrange, cfergeau, crobinso, dwmw2, itamar, pbonzini, rjones, virt-maint | ||||
| Target Milestone: | --- | Keywords: | Reopened | ||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | qemu-2.9.0-0.2.rc3.fc27 qemu-2.9.0-0.2.rc3.fc26 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2017-04-10 16:03:34 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 910269 | ||||||
| Attachments: |
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Description
Richard W.M. Jones
2017-04-06 20:55:30 UTC
The qemu command line is:
/usr/bin/qemu-kvm \
-global virtio-blk-pci.scsi=off \
-nodefconfig \
-enable-fips \
-nodefaults \
-display none \
-machine accel=kvm:tcg \
-cpu host \
-m 2000 \
-no-reboot \
-rtc driftfix=slew \
-no-hpet \
-global kvm-pit.lost_tick_policy=discard \
-kernel /home/rjones/d/libguestfs/tmp/.guestfs-1000/appliance.d/kernel \
-initrd /home/rjones/d/libguestfs/tmp/.guestfs-1000/appliance.d/initrd \
-object rng-random,filename=/dev/urandom,id=rng0 \
-device virtio-rng-pci,rng=rng0 \
-device virtio-scsi-pci,id=scsi \
-drive file=/home/rjones/d/libguestfs/tmp/v2vovld3c613.qcow2,cache=unsafe,discard=unmap,format=qcow2,copy-on-read=on,id=hd0,if=none \
-device scsi-hd,drive=hd0 \
-drive file=/home/rjones/d/libguestfs/tmp/v2vovl10d0af.qcow2,cache=unsafe,discard=unmap,format=qcow2,copy-on-read=on,id=hd1,if=none \
-device scsi-hd,drive=hd1 \
-drive file=/home/rjones/d/libguestfs/tmp/.guestfs-1000/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none,format=raw \
-device scsi-hd,drive=appliance \
-device virtio-serial-pci \
-serial stdio \
-device sga \
-chardev socket,path=/run/user/1000/libguestfs7XpIFo/guestfsd.sock,id=channel0 \
-device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
-netdev user,id=usernet,net=169.254.0.0/16 \
-device virtio-net-pci,netdev=usernet \
-append 'panic=1 console=ttyS0 edd=off udevtimeout=6000 udev.event-timeout=6000 no_timer_check printk.time=1 cgroup_disable=memory usbcore.nousb cryptomgr.notests tsc=reliable 8250.nr_uarts=1 root=/dev/sdc selinux=0 guestfs_verbose=1 guestfs_network=1 TERM=xterm-256color guestfs_identifier=v2v'
The minimal reproducer appears to be:
#!/bin/bash
set -e
set -x
rm -f /tmp/blank-disk.img
truncate -s 1M /tmp/blank-disk.img
qemu-img create -b /tmp/blank-disk.img -f qcow2 /tmp/ovl1.qcow2
/usr/bin/qemu-system-x86_64 \
-device virtio-scsi-pci,id=scsi \
-drive file=/tmp/ovl1.qcow2,cache=unsafe,discard=unmap,format=qcow2,copy-on-read=on,id=hd0,if=none \
-device scsi-hd,drive=hd0
-----------
When run this prints:
+ rm -f /tmp/blank-disk.img
+ truncate -s 1M /tmp/blank-disk.img
+ qemu-img create -b /tmp/blank-disk.img -f qcow2 /tmp/ovl1.qcow2
Formatting '/tmp/ovl1.qcow2', fmt=qcow2 size=1048576 backing_file=/tmp/blank-disk.img encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
+ /usr/bin/qemu-system-x86_64 -device virtio-scsi-pci,id=scsi -drive file=/tmp/ovl1.qcow2,cache=unsafe,discard=unmap,format=qcow2,copy-on-read=on,id=hd0,if=none -device scsi-hd,drive=hd0
qemu-system-x86_64: /builddir/build/BUILD/qemu-2.9.0-rc2/block/io.c:948: bdrv_co_do_copy_on_readv: Assertion `child->perm & (BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE)' failed.
/tmp/test.sh: line 15: 6880 Aborted (core dumped) /usr/bin/qemu-system-x86_64 -device virtio-scsi-pci,id=scsi -drive file=/tmp/ovl1.qcow2,cache=unsafe,discard=unmap,format=qcow2,copy-on-read=on,id=hd0,if=none -device scsi-hd,drive=hd0
I suggest raising it on qemu-devel since we are still in rc phase https://lists.nongnu.org/archive/html/qemu-devel/2017-04/msg01096.html Kevin posted a fix which works for me: https://lists.nongnu.org/archive/html/qemu-devel/2017-04/msg01192.html The upstream commit is 1bf03e66fd03af46ff0f98dd04b6e28f432ac1e3. qemu-2.9.0-0.2.rc3.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-0d191d9d55 qemu-2.9.0-0.2.rc3.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-0d191d9d55 qemu-2.9.0-0.2.rc3.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report. |