Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
For bugs related to Red Hat Enterprise Linux 5 product line. The current stable release is 5.10. For Red Hat Enterprise Linux 6 and above, please visit Red Hat JIRA https://issues.redhat.com/secure/CreateIssue!default.jspa?pid=12332745 to report new issues.

Bug 310801

Summary: Register backing store bug.
Product: Red Hat Enterprise Linux 5 Reporter: Andrew B <andrew>
Component: kernelAssignee: Luming Yu <luyu>
Status: CLOSED ERRATA QA Contact: Martin Jenner <mjenner>
Severity: low Docs Contact:
Priority: low    
Version: 5.0CC: dchapman, dzickus, luyu, peterm, prarit
Target Milestone: ---   
Target Release: ---   
Hardware: ia64   
OS: Linux   
Whiteboard:
Fixed In Version: RHBA-2008-0314 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-05-21 14:56:47 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:
Attachments:
Description Flags
Register backing store patch none

Description Andrew B 2007-09-28 13:00:51 UTC 
Description of problem:

A bug in the register backing store code can interact badly with the address
space randomisation feature to cause applications to seg-fault.

This is fixed by the attached patch, which has already been submitted back to
the mainline kernel and is currently included in the 2.6.23-rc8 prepatch.

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

Any IA64 Linux RH version could be effected, though it's unlikely that this
issue will be noticed until the address space randomisation is turned on.


How reproducible:

This problem is always reproducible for me on our product, but I've not figured
out exactly why we trigger the bug and other applications don't yet.

Steps to Reproduce:

So far I've not been unable to recreate this in a small, standalone example.
  
Actual results:

N/A

Expected results:

N/A

Additional info:
Comment 1 Andrew B 2007-09-28 13:00:51 UTC 
Created attachment 210261 [details]
Register backing store patch
Comment 2 RHEL Program Management 2007-11-09 11:45:18 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.
Comment 4 Don Zickus 2007-12-14 18:34:19 UTC 
in 2.6.18-60.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 7 errata-xmlrpc 2008-05-21 14:56:47 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 the 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-2008-0314.html