RHBA-2014:1480 - Bug Fix Advisory

Topic

Updated libcgroup packages that fix several bugs and add one enhancement are now
available for Red Hat Enterprise Linux 6.

Description

The libcgroup packages provide tools and libraries to manage and monitor control
groups.

This update fixes the following bugs:

• Previously, the cgset command failed to assign value to multiple subsystem

parameters at once. This behavior occurred only when using the -r option more
than once to tune parameters of a single subsystem. Configuring different
subsystems simultaneously worked correctly. This bug has been fixed, and cgset
can now set multiple parameters of a single subsystem without complications.
(BZ#1022842)

• Previous libcgroup update introduced an unnecessary dependency on the

redhat-lsb-core package. The redhat-lsb-core package subsequently pulled in a
large number of other packages, which could cause problems on hardware with
limited storage. With this update, the unnecessary dependency on the
redhat-lsb-core package has been removed, and thus no unneeded packages are
installed on system. (BZ#1028773)

• Prior to this update, the /src/config.c file contained the incorrectly

specified cgroup_copy_cgroup() function. Consequently, certain user-specific
resource limits set in the /etc/cgconfig.conf configuration file were not
applied. This update fixes the syntax of the aforementioned function in
/src/config.c. As a result, all settings in /etc/cgconfig.conf are applied as
expected. (BZ#1057676)

• Previously applied patch that aimed to increase the performance of the

pam_cgroup module contained a bug. Consequently, pam_cgroup failed to start and
it did not produce an error message. With this update, the aforementioned patch
has been reverted, and pam_cgroup now works as expected. (BZ#1060227)

• The cgset utility did not process all memory subsystem parameters passed to

the --copy-from command-line option correctly. Consequently, these control group
parameters were not transferred successfully and no warning message was issued.
With this update, cgset has been modified to correctly process parameters of
memory subsystem passed to --copy-from option, thus fixing this bug.
(BZ#1080281)

In addition, this update adds the following enhancement:

• This update adds the /etc/cgconfig.d/ hierarchy designed to store

configuration files applicable to various services. (BZ#1058363)

Users of libcgroup are advised to upgrade to these updated packages, which fix
these bugs and add this enhancement.

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/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 1057676 - Cgroup templates not getting applied because of bad struct copy
• BZ - 1060227 - libcgroup-pam-0.40.rc1-5.el6_5.1 is completely broken

CVEs

(none)

References

(none)