This bug has been copied from bug #630563 and has been proposed to be backported to 5.3 z-stream (EUS).
in kernel-2.6.18-128.29.1.el5 linux-2.6-mm-add-guard-page-for-stacks-that-grow-upwards.patch
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: An additional patch has been applied to add a guard page for stacks that grow upwards.
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-2011-0140.html