+++ This bug was initially created as a clone of Bug #250496 +++
Description of problem:
The eHCA driver has a problem with mapping userspace resources. It's nicely
explained in the upstream git submission:
Some drivers have resources that they want to be able to map into
userspace that are 4k in size. On a kernel configured with 64k pages
we currently end up mapping the 4k we want plus another 60k of
physical address space, which could contain anything. This can
introduce security problems, for example in the case of an infiniband
adaptor where the other 60k could contain registers that some other
program is using for its communications.
This is present in kernel-2.6.18-36.el5
Without these changes the eHEA driver will only function in IPoIB (IP over
Infiniband). User space applications will fail to run (for example MPI). Its
primary value is thus not usable.
-- Additional comment from firstname.lastname@example.org on 2007-08-01 17:58 EST --
Created an attachment (id=160469)
Created attachment 160470 [details]
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.