This bug has been copied from bug #625841 and has been proposed to be backported to 5.5 z-stream (EUS).
in kernel 2.6.18-194.20.1.el5 linux-2.6-scsi-lpfc-fix-ioctl-crash-in-lpfc_nlp_put.patch
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/RHSA-2010-0839.html
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: Under certain circumstances, an attempt to dereference a NULL pointer in the lpfc_nlp_put() function may have caused the system to crash. With this update, several changes have been made to ensure the correct reference count, resolving this issue.