Bug 253533 - Data corruption with multiple qemu or KVM Instances possible
Summary: Data corruption with multiple qemu or KVM Instances possible
Alias: None
Product: Fedora
Classification: Fedora
Component: qemu (Show other bugs)
(Show other bugs)
Version: 7
Hardware: All Linux
Target Milestone: ---
Assignee: David Woodhouse
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2007-08-20 13:52 UTC by Sven Oehme
Modified: 2008-06-17 02:11 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-06-17 02:11:47 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Sven Oehme 2007-08-20 13:52:40 UTC
Description of problem:

you can start multiple instances of qemu as well as kvm using a single disk
image in R/W 

Version-Release number of selected component (if applicable):

all Versions 

How reproducible:

start qemu or qemu-kvm multiple times and point to the same image file after
-hda (e.g. -hda /temp/image) 

Steps to Reproduce:
1. create a image
2. install aguest 
3. start qemu first time, login, write to disk
4. start qemu second time, login, write to disk
Actual results:

filesystem gets corrupted 

Expected results:

the application should set a lock on the image and should denie the acces to the
image to the second instance by default. a flag -force-rw or similar need to be
set to override the default 

Additional info:

especially if you have multiple hosts running kvm and you like to share/migrate
images between hosts (over nfs , gfs or other filesystems) it is critical that
the 2. instances get a deny on a already in use file as with more images it is
more likely that by mistake somebody is using the same volume in rw mode

Comment 1 Bug Zapper 2008-05-14 14:02:17 UTC
This message is a reminder that Fedora 7 is nearing the end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 7. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '7'.

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Comment 3 Bug Zapper 2008-06-17 02:11:45 UTC
Fedora 7 changed to end-of-life (EOL) status on June 13, 2008. 
Fedora 7 is no longer maintained, which means that it will not 
receive any further security or bug fix updates. As a result we 
are closing this bug. 

If you can reproduce this bug against a currently maintained version 
of Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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