Bug 1134251
| Summary: | Opening an obviously truncated VMDK image should fail | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Fam Zheng <famz> |
| Component: | qemu-kvm | Assignee: | Fam Zheng <famz> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.1 | CC: | hhuang, huding, juzhang, mrezanin, rbalakri, sluo, tlavigne, virt-maint, xfu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-1.5.3-84.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-03-05 08:11:25 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-1.5.3-84.el7 Reproduce this issue:
host info:
# uname -r && rpm -q qemu-kvm
3.10.0-219.el7.x86_64
qemu-kvm-1.5.3-83.el7.x86_64
# qemu-img create -f vmdk a.vmdk 4T
Formatting 'a.vmdk', fmt=vmdk size=4398046511104 compat6=off zeroed_grain=off
# truncate a.vmdk --size 1M
# qemu-img info a.vmdk
image: a.vmdk
file format: vmdk
virtual size: 4.0T (4398046511104 bytes)
disk size: 520K
Format specific information:
cid: 1419402502
parent cid: 4294967295
create type: monolithicSparse
extents:
[0]:
virtual size: 4398046511104
filename: a.vmdk
cluster size: 65536
format:
Verify this issue:
host info:
# uname -r && rpm -q qemu-kvm
3.10.0-219.el7.x86_64
qemu-kvm-1.5.3-84.el7.x86_64
# qemu-img create -f vmdk a.vmdk 4T
Formatting 'a.vmdk', fmt=vmdk size=4398046511104 compat6=off zeroed_grain=off
# truncate a.vmdk --size 1M
# qemu-img info a.vmdk
qemu-img: Could not open 'a.vmdk': File truncated, expecting at least 537985024 bytes
Base on above, this issue has been fixed correctly, move to VERIFIED status, please correct me if any mistake, thanks.
Best Regards,
sluo
Tried the qemu-kvm-rhev-2.1.2-17.el7.x86_64 which also did not have such issue. host info: # uname -r && rpm -q qemu-kvm-rhev 3.10.0-219.el7.x86_64 qemu-kvm-rhev-2.1.2-17.el7.x86_64 # qemu-img create -f vmdk a.vmdk 4T Formatting 'a.vmdk', fmt=vmdk size=4398046511104 compat6=off # truncate a.vmdk --size 1M # qemu-img info a.vmdk qemu-img: Could not open 'a.vmdk': File truncated, expecting at least 537985024 bytes Best Regards, sluo 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://rhn.redhat.com/errata/RHSA-2015-0349.html |
For those VMDK images that are even smaller than the value in header field "overhead", the files are obviously truncated and unusable. We can detect and error out this case: $ qemu-img create -f vmdk a.vmdk 4T Formatting 'a.vmdk', fmt=vmdk size=4398046511104 compat6=off zeroed_grain=off $ truncate a.vmdk --size 1M Current result: $ ~/build/rhel7/qemu-img info a.vmdk image: a.vmdk file format: vmdk virtual size: 4.0T (4398046511104 bytes) disk size: 520K Format specific information: cid: 1409125474 parent cid: 4294967295 create type: monolithicSparse extents: [0]: virtual size: 4398046511104 filename: a.vmdk cluster size: 65536 format: Expected result: $ qemu-img info a.vmdk qemu-img: Could not open 'a.vmdk': File truncated, expecting at least 537985024 bytes