Bug 646871

Summary:	misaddresed user-space probes on prelinked shared libraries on i686 (REL)
Product:	Red Hat Enterprise Linux 6	Reporter:	Frank Ch. Eigler <fche>
Component:	systemtap	Assignee:	Frank Ch. Eigler <fche>
Status:	CLOSED ERRATA	QA Contact:	qe-baseos-tools-bugs
Severity:	high	Docs Contact:
Priority:	low
Version:	6.1	CC:	jeast, mjw, pmuller, roland
Target Milestone:	rc
Target Release:	---
Hardware:	i686
OS:	Unspecified
Whiteboard:
Fixed In Version:	systemtap-1.4-1.el6	Doc Type:	Bug Fix
Doc Text:	n/a, see bug #652858.	Story Points:	---
Clone Of:	646870
Clones:	652857 652858 (view as bug list)		Environment:
Last Closed:	2011-05-19 13:54:48 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:	646870, 652857, 652858
Bug Blocks:

Description Frank Ch. Eigler 2010-10-26 14:25:28 UTC

+++ This bug was initially created as a clone of Bug #646870 +++

Due to a suspected problem in the way systemtap/elfutils
compute PC addresses to place int3 probe breakpoints into
prelinked shared libraries, sometimes the wrong instruction
is modified.  This can lead to lost probes, or segmentation
violations, or more subtle errors.  This problem appears to
exist in all versions of systemtap.

"prelink -u /usr/lib/libFOO.so" corrects the miscalculations,
as a temporary workaround.

This issue is being tracked upstream at
http://sourceware.org/bugzilla/show_bug.cgi?id=12141

Comment 2 Frank Ch. Eigler 2010-11-14 02:04:18 UTC

elfutils patch in hand

Comment 4 Frank Ch. Eigler 2011-01-17 15:30:50 UTC

relies on elfutils 0.151 (or perhaps 0.150)

Comment 10 Frank Ch. Eigler 2011-05-12 13:54:50 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
n/a, see bug #652858.

Comment 11 errata-xmlrpc 2011-05-19 13:54:48 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0651.html