Bug 882188 – samba4-libs: yyin symbol collision

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Bug 882188 - samba4-libs: yyin symbol collision

Summary:	samba4-libs: yyin symbol collision

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	samba4 (Show other bugs)
Sub Component:
Version:	6.3
Hardware:	Unspecified Unspecified

Priority	medium Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Andreas Schneider
QA Contact:	Namita Soman
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	882173
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Reported:	2012-11-30 06:04 EST by Florian Weimer
Modified:	2013-02-21 03:46 EST (History)
CC List:	1 user (show)

See Also:
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 03:46:21 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2013:0506	normal	SHIPPED_LIVE	Moderate: samba4 security, bug fix and enhancement update	2013-02-20 16:30:25 EST

Groups: None (edit)

Description Florian Weimer 2012-11-30 06:04:37 EST

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 07:10:27 EST

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 07:17:14 EST

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

Comment 5 Namita Soman 2013-01-28 21:47:56 EST

please provide steps to verify

Comment 6 Florian Weimer 2013-01-29 04:17:48 EST

(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 06:21:19 EST

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 03:46:21 EST

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

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