Bug 201650

Summary:	directory corruption in Linux 2.6.17 with xfs
Product:	[Fedora] Fedora	Reporter:	Thomas Antony <thomas>
Component:	kernel	Assignee:	Eric Sandeen <esandeen>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	5	CC:	davej, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://oss.sgi.com/projects/xfs/faq.html#dir2
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-08-11 06:18:07 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Thomas Antony 2006-08-07 22:49:10 UTC

Description of problem:
The linux kernel 2.6.17 can cause directory corruption with xfs formatted
partitions.
In the Linux kernel 2.6.17 release a subtle bug was accidentally introduced into
the XFS directory code by some "sparse" endian annotations. This bug was
sufficiently uncommon (it only affects a certain type of format change, in Node
or B-Tree format directories, and only in certain situations).

Version-Release number of selected component (if applicable):
kernel-2.6.17-*


How reproducible:
update the kernel to a 2.6.17 version and have a xfs partiton formatted with xfs
and mounted r/w.

Steps to Reproduce:
1. format a partition with xfs
2. update to a 2.6.17 kernel
3. mount it r/w and do crreate/modifiy some data
  
Actual results:
directory corruption and data loss

Expected results:
a stable filesystem

Additional info:
http://oss.sgi.com/projects/xfs/faq.html#dir2

Comment 1 Dave Jones 2006-08-08 19:01:11 UTC

This should be fixed in the 2.6.17.8 based update currently in updates-testing
(due to move to final today/tomorrow) I think.  Eric ?

Comment 2 Eric Sandeen 2006-08-08 19:39:04 UTC

This should have been fixed in 2.6.17.7 actually.

http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.7

grep for "XFS: corruption fix"

Also, xfsprogs v 2.8.10 will be needed to repair the damage...

Comment 3 Thomas Antony 2006-08-10 08:21:23 UTC

I have created a bug entry against xfsprogs, but did not get a response from
Jeff Garzik yet.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=201654