Bug 1211098

Summary:	ld.so crash when audit modules provide path
Product:	Red Hat Enterprise Linux 6	Reporter:	Kazu Yoshida <kyoshida>
Component:	glibc	Assignee:	Florian Weimer <fweimer>
Status:	CLOSED ERRATA	QA Contact:	Arjun Shankar <ashankar>
Severity:	high	Docs Contact:	Marc Muehlfeld <mmuehlfe>
Priority:	high
Version:	6.6	CC:	apetrova, ashankar, bhubbard, codonell, fweimer, mmuehlfe, mnewsome, pfrankli
Target Milestone:	rc	Keywords:	Patch
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	glibc-2.12-1.176.el6	Doc Type:	Release Note
Doc Text:	The dynamic linker (ld.so) does not fail anymore when an audit module provides a DSO path Previously, when an audit module provided an alternate DSO (dynamic shared object) path, the ld.so dynamic linker terminated unexpectedly with a segmentation fault. This update addresses the bug, and now the dynamic linker keeps track of the original DSO path for future reference and does not fail anymore.	Story Points:	---
Clone Of:
Clones:	1211100 (view as bug list)		Environment:
Last Closed:	2016-05-10 21:26:33 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:	1172231, 1271375

Description Kazu Yoshida 2015-04-13 01:48:28 UTC

Description of problem:

When audit modules provide path as the return value of the la_objsearch calls the name replaces whatever ld.so uses to find the DSO.  If the target DSO has an SONAME this is the SONAME. As a result the SONAME is not in the list by which the DSO is known. This usually is no problem. It becomes a problem when the SONAME is needed afterwards. One example is checking symbol and DSO versions.

Version-Release number of selected component (if applicable):
RHEL6 glibc

How reproducible:
As below

Steps to Reproduce:
ld.so crash when below both  conditions are met
1) audit modules provide path
2) dependent libary(ie what is recorded in NEEDED section) has dso versioning

Actual results:
ld.so crash

Expected results:
ld.so not to crash

Additional info:
Upstream bugzilla
https://sourceware.org/bugzilla/show_bug.cgi?id=18251

Comment 1 Kazu Yoshida 2015-04-13 01:57:37 UTC

glibc-2.12-1.149.el6_6.5

Comment 9 Florian Weimer 2015-11-06 13:20:26 UTC

Ulrich's patch posted upstream:

  https://sourceware.org/ml/libc-alpha/2015-11/msg00112.html

Comment 17 errata-xmlrpc 2016-05-10 21:26:33 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-2016-0834.html