Bug 1813245

Summary:	Rebase lz4 to 1.8.2 release version
Product:	Red Hat Enterprise Linux 7	Reporter:	Divya <dbasant>
Component:	lz4	Assignee:	Jakub Martisko <jamartis>
Status:	CLOSED ERRATA	QA Contact:	Radka Brychtova <rskvaril>
Severity:	low	Docs Contact:
Priority:	low
Version:	7.7	CC:	fsumsal, rskvaril, vikpatil
Target Milestone:	rc	Keywords:	Rebase
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1821237 (view as bug list)		Environment:
Last Closed:	2020-09-29 20:06:43 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:
Bug Depends On:
Bug Blocks:	1821237

Description Divya 2020-03-13 11:24:38 UTC

Description of problem:
In older versions of lz4 (anything older than 1.8.2) bit errors can be introduced when compressing from fragmented source memory (i.e., a sequence of non-continguous memory extents).

Version-Release number of selected component (if applicable):
lz4-1.7.5-3

How reproducible:
Always

Steps to Reproduce:
1.
2.
3.

Actual results:
Ceph clusters crash

Expected results:
Ceph clusters should not crash

Additional info:
Upstream thread at https://github.com/ceph/ceph/pull/33584 discusses the issue in detail and also has a reproducer. Fix of this issue is available at https://github.com/lz4/lz4/commit/af127334670a5e7b710bbd6adb71aa7c3ef0cd72, but backporting it alone seems impossible so rebase seems the most feasible option.

Comment 12 Divya 2020-08-20 07:59:46 UTC

Hello 

Sorry for missing out on getting the justification as requested in comment #2. I've set the priority of this bug based on priority with which customer opened the case with Red Hat. I see bug has already got all the acks for RHEL-7.9, so I am clearing the needinfo for now. Let me know if there is anything I need to provide here.

Comment 14 errata-xmlrpc 2020-09-29 20:06:43 UTC

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 (lz4 bug fix and enhancement update), 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-2020:3957