committed in stream U6 build 61. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/
I tried -61 on an AMD test system running the i386 version of 4.5. The system survived running my reproducer for 30 minutes, so this one should be ready to go to "Verified" once it makes its way into the erratum.
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-2007-0791.html