Red Hat Bugzilla – Bug 310801
Register backing store bug.
Last modified: 2013-08-05 21:43:38 EDT
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.
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.
Created attachment 210261 [details]
Register backing store patch
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
You can download this test kernel from http://people.redhat.com/dzickus/el5
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.