Bug 310801 - Register backing store bug.
Summary: Register backing store bug.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.0
Hardware: ia64
OS: Linux
low
low
Target Milestone: ---
: ---
Assignee: Luming Yu
QA Contact: Martin Jenner
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-09-28 13:00 UTC by Andrew B
Modified: 2013-08-06 01:43 UTC (History)
5 users (show)

Fixed In Version: RHBA-2008-0314
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2008-05-21 14:56:47 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
Register backing store patch (1.26 KB, patch)
2007-09-28 13:00 UTC, Andrew B
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2008:0314 0 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5.2 2008-05-20 18:43:34 UTC

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



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