Red Hat is aware of this issue and is tracking it via the following bug:
This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise MRG, as it did not include support for the GFS and GFS2 file systems.
For the GFS issue, it was addressed in Red Hat Enterprise Linux 3 in the gfs package, 4 in the GFS-kernel package, and 5 in the gfs-kmod package, via https://rhn.redhat.com/errata/RHSA-2010-9493.html, https://rhn.redhat.com/errata/RHSA-2010-9494.html, https://rhn.redhat.com/errata/RHSA-2010-0291.html respectively.
For the GFS2 issue, it was addressed in Red Hat Enterprise Linux 5 in the kernel package via https://rhn.redhat.com/errata/RHSA-2010-0178.html.
Red Hat Security Errata
|RHEL Cluster-Storage (v. 5.4.Z server) (gfs-kmod)||RHSA-2010:0521||2010-07-08|
|Red Hat Global File System 3AS (GFS)||RHSA-2010:0330||2010-03-30|
|Red Hat Enterprise Linux Cluster-Storage (v. 5 server) (gfs-kmod)||RHSA-2010:0291||2010-03-29|
|Red Hat Enterprise Linux 5 (kernel)||RHSA-2010:0178||2010-03-29|
|Red Hat Enterprise Linux EUS (v. 5.4 server) (kernel)||RHSA-2010:0380||2010-04-27|
|Red Hat Global File System 4AS (GFS-kernel)||RHSA-2010:0331||2010-03-30|