Bug 1004420 - Backport qcow2 corruption prevention patches
Backport qcow2 corruption prevention patches
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm (Show other bugs)
Unspecified Unspecified
medium Severity high
: rc
: ---
Assigned To: Max Reitz
Virtualization Bugs
Depends On: 1004347
Blocks: 1002699
  Show dependency treegraph
Reported: 2013-09-04 11:23 EDT by Kevin Wolf
Modified: 2014-12-11 11:13 EST (History)
13 users (show)

See Also:
Fixed In Version: qemu-kvm-
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1004347
Last Closed: 2014-10-14 02:50:28 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

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Description Kevin Wolf 2013-09-04 11:23:01 EDT
Once the RHEL 6.6 tree is open, it would be useful to have it backported there
as well. As it's only prevention, we'll not include it in 6.5.

+++ This bug was initially created as a clone of Bug #1004347 +++

Upstream commits d4ca092a to ca0eca91 implements sanity checks for writes to a
qcow2 image as follows:

> If a qcow2 image file becomes corrupted, any write may inadvertently
> overwrite important metadata structures such as the L1 table. This
> series adds functionality for detecting, preventing and (to some extent)
> repairing such collisions.

This is something that we'll want to have in RHEL 7.
Comment 1 Ayal Baron 2014-01-29 05:03:33 EST
Please note that this bug affects RHEV customers and we would like to see this in 6.6
Comment 6 Jeff Nelson 2014-05-23 14:08:10 EDT
Fix included in qemu-kvm-
Comment 16 Sibiao Luo 2014-08-11 04:58:10 EDT
Verify this issue.

host info:
# uname -r && rpm -q qemu-kvm

# rpm -ivh qemu-kvm-
# rpmbuild -bp --nodeps /root/rpmbuild/SPECS/qemu-kvm.spec
# tar -zxvf /root/rpmbuild/SOURCES/qemu-kvm-
qemu-iotests]# pwd
qemu-iotests]# export QEMU_PROG=/usr/libexec/qemu-kvm

qemu-iotests]# ./check -qcow2 060
QEMU          -- /usr/libexec/qemu-kvm
QEMU_IMG      -- /usr/bin/qemu-img
QEMU_IO       -- /usr/bin/qemu-io 
QEMU_NBD      -- 
IMGFMT        -- qcow2
IMGPROTO      -- file
PLATFORM      -- Linux/x86_64 intel-5504-12-2 2.6.32-491.el6.x86_64

Passed all 1 tests

According to above, comment #13 and comment #15, set this issue to VERIFIED status.
Comment 17 errata-xmlrpc 2014-10-14 02:50:28 EDT
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.


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