Jim, patches relative to RHEL4 are in comments 3 and 4 of bug 154451.
I originally labelled this issue as CAN-2005-0756 however that was in error due to two similar ptrace check issues. The following is as reported to vendor-sec: Fixing rip -> CAN-2005-1762 Fixing fs_base and gs_base -> CAN-2005-0756 [PATCH] x86_64: check if ptrace RIP is canonical This works around an AMD Erratum. This is a DoS on 2.4 and 2.6 http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d1099e8a18960693c04507bdd7b9403db70bfd97
A fix for this problem has just been committed to the RHEL3 U6 patch pool this evening (in kernel version 2.4.21-32.8.EL).
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/RHSA-2005-663.html