Bug 882188

Summary:	samba4-libs: yyin symbol collision
Product:	Red Hat Enterprise Linux 6	Reporter:	Florian Weimer <fweimer>
Component:	samba4	Assignee:	Andreas Schneider <asn>
Status:	CLOSED ERRATA	QA Contact:	Namita Soman <nsoman>
Severity:	unspecified	Docs Contact:
Priority:	medium
Version:	6.3	CC:	sbose
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	samba4-4.0.0-24.el6.rc1	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-02-21 08:46:21 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:	882173

Description Florian Weimer 2012-11-30 11:04:37 UTC

Two DSOs define "yyin" and other flex-related symbols:

 /usr/lib64/libdcerpc_samr.so.0.0.1     | samba4-libs-4.0.0-23.alpha11.el6.x86_64
 /usr/lib64/libdcerpc.so.0.0.1          | samba4-libs-4.0.0-23.alpha11.el6.x86_64

This can lead to symbol collisions and hard-to-track-down bugs.  These symbols should be mangled or hidden.

This might already have been fixed upstream because I don't see it in F18 anymore.

Comment 2 Andreas Schneider 2012-11-30 12:10:27 UTC

yyin and yyout are defined in the in-source heimdal kerberos. In RHEL 6.4 we build with MIT Kerberos. So there are no such symbols.

Comment 3 Andreas Schneider 2012-11-30 12:17:14 UTC

Also all heimdal 'in-source' libraries have version scripts to export only public symbols. This is fixed with the rebase!

Comment 5 Namita Soman 2013-01-29 02:47:56 UTC

please provide steps to verify

Comment 6 Florian Weimer 2013-01-29 09:17:48 UTC

(In reply to comment #5)
> please provide steps to verify

You can check the DSOs with:

$ readelf -s libdcerpc.so.0.0.1 | grep yy

If this command shows no output, the symbols are indeed gone.

Comment 7 Namita Soman 2013-01-29 11:21:19 UTC

Thanks for the steps!

Verified using them:
readelf -s /usr/lib64/libdcerpc.so.0.0.1 | grep yy
<Nothing listed>

Comment 8 errata-xmlrpc 2013-02-21 08:46:21 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.

http://rhn.redhat.com/errata/RHSA-2013-0506.html