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Bug 1187217

Summary:	Customer is using libmpathpersist and since updating to device-mapper-multipath-0.4.9-80.el6_6.1 is experiencing application coredumps
Product:	Red Hat Enterprise Linux 6	Reporter:	Jan Kurik <jkurik>
Component:	device-mapper-multipath	Assignee:	Ben Marzinski <bmarzins>
Status:	CLOSED ERRATA	QA Contact:	yanfu,wang <yanwang>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	6.6	CC:	agk, asanders, bmarzins, bubrown, dwysocha, heinzm, jherrman, jmagrini, loberman, mgandhi, msnitzer, pm-eus, prajnoha, prockai, rbalakri, tbowling, yanwang, zkabelac
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	device-mapper-multipath-0.4.9-80.el6_6.3	Doc Type:	Bug Fix
Doc Text:	Previously, the libmultipath utility was keeping a global cache of sysfs data for all programs, even though this was only necessary for the multipathd daemon. As a consequence, a memory error could occur when multiple threads were using libmultipath without locking. This led to unexpected termination of multithreaded programs using the mpath_persistent_reserve_in() or mpath_persistent_reserve_out() functions. With this update, only multipathd uses the global sysfs data cache, and the described crashes are thus avoided.	Story Points:	---
Clone Of:	1171862	Environment:
Last Closed:	2015-02-05 08:58:44 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:
Bug Depends On:	1171862
Bug Blocks:

Description Jan Kurik 2015-01-29 15:00:29 UTC

This bug has been copied from bug #1171862 and has been proposed
to be backported to 6.6 z-stream (EUS).

Comment 3 Ben Marzinski 2015-01-29 21:05:19 UTC

Fix backported.

Comment 5 Ben Marzinski 2015-01-30 02:01:52 UTC

I think this will need to be tested by the reporter.  QA should still do sanity testing to make sure that no regressions were introduced, but this defect doesn't effect any of the actual programs in the device-mapper-multipath package.

Comment 12 errata-xmlrpc 2015-02-05 08:58:44 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, 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/RHBA-2015-0129.html