RHBA-2015:0452 - Bug Fix Advisory

Topic

Updated libcgroup packages that fix several bugs and add various enhancements
are now available for Red Hat Enterprise Linux 7.

Description

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

This update fixes the following bugs:

• Previously, the parameters for the test_cgroup2/ SPISE group were not set. As

a consequence, running the "cgset --copy-from test_cgroup1/ test_cgroup2/"
command failed with an error message. This update sets the parameters for
test_cgroup2/, and the aforementioned command no longer fails. (BZ#963515)

• Prior to this update, the cgconfigparser utility wrote the whole multi-line

value in the single write() function call, whereas the "devices" kernel
subsystem expects only one line per write(). Consequently, cgconfigparser did
not properly parse multi-line variables. The underlying source code has been
fixed, and cgconfigparser now parses all variables as intended. (BZ#1142807)

• In the /etc/cgconfig.conf file, the cgroup named as "default" was not

considered a valid name. As a consequence, /etc/cgconfig.conf file lost backward
compatibility and failed to parse. With this update, double quotes are used when
listing cgroup names, and /etc/cgconfig.conf is now parsed correctly.
(BZ#1143851)

In addition, this update adds the following enhancements:

• With this update, cgcreate supports the "*" (asterisk) option. Now, if no

controller is specified, it is assumed that all mounted controllers are taken
into consideration. In addition, it is no longer mandatory to specify
controller(s) in command-line options. If the user has not specified any
controller, only a cgroup, then it is assumed that the operation applies to all
mounted hierarchies. (BZ#885166)

• With this update, the /etc/cgconfig.d/ directory has been included in the

libcgroup packages by default. It can contain additional cgroup config files
specific to individual applications. This allows the user to ship his
configuration files together with his application. (BZ#885174)

• This update provides a more detailed entry for the cgset utility in a number

of libcgroup man pages, including examples demonstrating the correct syntax for
setting the parameters of given cgroup(s). (BZ#886920)

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

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64

Fixes

• BZ - 1142807 - cgconfigparser does not properly parse the multi-line variables
• BZ - 1143851 - cgroup named as default without double quotes is not parsed

CVEs

(none)

References

(none)