[Crash-utility] Issues with ps -a/vtop

Hello All, I ran into this problem were ps -a/vtop can't access user space. Looking at the change log it appears a fix was put in as 4.0-3.7. But I'm seeing this issue with 5.1.3 crash> ps -a 23591 PID: 23591 TASK: ffff8103813be7a0 CPU: 5 COMMAND: "python" ps: cannot access user stack address: 7fff7d89a75f crash> vtop 7fff7d89a75f VIRTUAL PHYSICAL 7fff7d89a75f (not accessible) This is on a RHEL 5.4 with kernel 2.6.18-194.11.3.el5. What information will needed to debug this? Or am I using these commands incorrectly? Thanks in advance for any help you can give me. Steven Soulen Unless otherwise indicated, this message is intended only for the personal and confidential use of the designated recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product or service, an official confirmation of any transaction, or as an official statement of the entity sending this message. Email transmission cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice.