isec.pl reported a missing down() on mmap_sem semaphore whilst calling do_brk; so if do_brk() sleeps on a kmalloc it may get into a VMA list race - leading to results similar to the do_brk exploit.
Created attachment 109344 [details] Proposed patch for this issue.
Removing embargo
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-2005-092.html