Bug 1576598
| Summary: | Segfault in qemu-io and qemu-img with -U --image-opts force-share=off | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Hanna Czenczek <hreitz> |
| Component: | qemu-kvm-rhev | Assignee: | Hanna Czenczek <hreitz> |
| Status: | CLOSED ERRATA | QA Contact: | Tingting Mao <timao> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.6 | CC: | chayang, coli, juzhang, michen, ngu, pingl, qzhang, timao, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-rhev-2.12.0-5.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-11-01 11:09:52 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: | |||
Fix included in qemu-kvm-rhev-2.12.0-5.el7 Verified the bug with below packages an test steps.
Packages tested:
kernel-3.10.0-915.el7
qemu-kvm-rhev-2.12.0-5.el7
Test steps:
1. Option '-U' and 'force-share=off' can't be used at the same time.
1.1 for a file
# qemu-io -r -U --image-opts driver=file,filename=/dev/null,force-share=off
-U conflicts with image options
# qemu-img info -U --image-opts driver=file,filename=/dev/null,force-share=off
qemu-img: --force-share/-U conflicts with image options
1.2 for a qcow2 image
# qemu-io -r -U --image-opts driver=qcow2,file.driver=file,file.filename=base.qcow2,force-share=off
-U conflicts with image options
# qemu-img info -U --image-opts driver=qcow2,file.driver=file,file.filename=base.qcow2,force-share=off
qemu-img: --force-share/-U conflicts with image options
2. Option '-U' and 'force-share=on' can be used at the same time.
2.1 for a file
# qemu-io -r -U --image-opts driver=file,filename=/dev/null,force-share=on
qemu-io>
# qemu-img info -U --image-opts driver=file,filename=/dev/null,force-share=on
image: /dev/null
file format: file
virtual size: 0 (0 bytes)
disk size: 0
2.2 for a qcow2 image
# qemu-io -r -U --image-opts driver=qcow2,file.driver=file,file.filename=base.qcow2,force-share=on
qemu-io>
# qemu-img info -U --image-opts driver=qcow2,file.driver=file,file.filename=base.qcow2,force-share=on
image: base.qcow2
file format: qcow2
virtual size: 100M (104857600 bytes)
disk size: 1.3M
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
3. Run case 153 in qemu-iotests
# rpm -ivhf qemu-kvm-rhev-2.12.0-5.el7.src.rpm
# rpmbuild -bp /root/rpmbuild/SPECS/qemu-kvm.spec --nodeps
# cd /root/rpmbuild/BUILD/qemu-2.12.0/
# ./configure
# export QEMU_PROG=/usr/libexec/qemu-kvm
# export QEMU_IMG_PROG=/usr/bin/qemu-img
# export QEMU_IO_PROG=/usr/bin/qemu-io
# export QEMU_NBD_PROG=/usr/bin/qemu-nbd
# cd tests/qemu-iotests
# ./check -qcow2 153
QEMU -- "/usr/libexec/qemu-kvm" -nodefaults -machine accel=qtest
QEMU_IMG -- "/usr/bin/qemu-img"
QEMU_IO -- "/usr/bin/qemu-io" --cache writeback -f qcow2
QEMU_NBD -- "/usr/bin/qemu-nbd"
IMGFMT -- qcow2 (compat=1.1)
IMGPROTO -- file
PLATFORM -- Linux/x86_64 hp-dl385g7-09 3.10.0-915.el7.x86_64
TEST_DIR -- /root/rpmbuild/BUILD/qemu-2.12.0/tests/qemu-iotests/scratch
SOCKET_SCM_HELPER --
153
Passed all 1 tests
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-2018:3443 |
Description of problem: qemu-io and qemu-img segfault (NULL dereference) when using -U together with --image-opts force-share=[anything]. Version-Release number of selected component (if applicable): $ git describe qemu-kvm-rhev-2.12.0-1.el7 Steps to Reproduce: qemu-io: $ ./qemu-io -r -U --image-opts \ driver=file,filename=/dev/null,force-share=off [1] 19058 segmentation fault (core dumped) ./qemu-io -r -U --image-opts driver=file,filename=/dev/null,force-share=off qemu-img: $ ./qemu-img info -U --image-opts \ driver=file,filename=/dev/null,force-share=off [1] 19681 segmentation fault (core dumped) ./qemu-img info -U --image-opts driver=file,filename=/dev/null,force-share=of Expected results: First, neither should crash. Secondly, when using -U together with force-share=off, we may want to report an error (because -U sets force-share=on). Additional info: Upstream patches are queued.