+++ This bug was initially created as a clone of Bug #520297 +++
Description of problem:
Add a check in ip_append_data() for NULL *rtp to prevent future bugs in callers from being exploitable.
A patch for this issue has been included in build 2.4.21-61.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 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.