RHBA-2013:1305 - Bug Fix Advisory

Topic

Updated clustermon packages that fix several bugs are now available for Red Hat
Enterprise Linux 5.

Description

The clustermon packages are used for remote cluster management. The modclusterd
service provides an abstraction of cluster status used by conga and by the
Simple Network Management (SNMP) and Common Information Model (CIM) modules of
clustermon.

This update fixes the following bugs:

• Previously, the SNMP agent exposing the cluster status and shipped as

cluster-snmp caused the SNMP server (snmpd) to terminate unexpectedly with a
segmentation fault when this module was loaded, and the containing server was
told to reload. This was caused by an improper disposal of the resources
facilitated by this server, alarms in particular. Now, the module will properly
clean up such resources when being unloaded, preventing the crash on reload.
(BZ#847289)

• Prior to this update, the dynamic library that represents the CIM provider of

a cluster status was not built with all the required dependencies, and certain
symbols could not be resolved. As a consequence, the cluster status could not be
accessed by CIM. This update adds the missing dependencies to the dynamic
library, and the cluster status is now accessible as expected. (BZ#882277)

• When modclusterd was about to associate the local machine with a particular

cluster node entry from the cluster configuration, it first tried CMAN API in an
improper way, yielding no expected results. This process occurred every five
seconds. As a consequence, it had to periodically resort to iterative detection
through local interface addresses. Also when logging for CMAN enabled, and
including membership messages, it would cause messages arising from the CMAN API
misuse to be emitted. Now, the API is used as expected, which corrects the
aforementioned consequences. (BZ#957798)

• Previously, a segmentation fault occurred in the modclusterd daemon and/or

modcluster, ricci cluster-dedicated module, when processing large cluster.conf
files (or peer-delivered counterparts). This was caused by the allocation of
large amounts of memory not available on the stack. With this update, a patch
has been introduced to allocate memory on the heap, and provide an error if not
enough memory is available. As a result, crashes no longer occur in the
described scenario. (BZ#965792)

Users of clustermon are advised to upgrade to these updated packages, which fix
these bugs.

Solution

Before applying this update, make sure all previously-released errata relevant
to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 5 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 5 ppc
• Red Hat Enterprise Linux High Availability for x86_64 5 ia64
• Red Hat Enterprise Linux High Availability for x86_64 5 i386
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 5 x86_64
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 5 i386

Fixes

• BZ - 882277 - cluster-cim: missing symbols/provider library not compiled properly

CVEs

(none)

References

(none)