RHBA-2015:0332 - Bug Fix Advisory

Topic

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

Description

The libteam packages contain a library which is a user-space counterpart for the
team network driver. The libteam library also provides an API to control team
network devices.

The libteam packages have been upgraded to upstream version 1.15, which provides
a number of bug fixes and enhancements over the previous version, including
documentation for the doxygen documenting tool. (BZ#1116970, BZ#1125296)

This update also fixes the following bugs:

• Previously, the team daemon did not restart and could not fail over. This

update makes sure that teamd is always running unless the user requests the
systemd daemon to stop it. As a result, teamd automatically restarts if
terminated unexpectedly, a teamd instance takes over. (BZ#1072855)

• Previously, when the user created a team device using initscripts and removed

the device by the ip command, the teamd daemon kept running unaware that the
device it controlled had already been removed. With this update, teamd detects
the removal and quits as expected. (BZ#1082551)

• Due to a regression, when using take-over mode, it was impossible to remove a

port using control interface, for example teamdctl. As a consequence, the ip
utility returned an error. A patch has been provided to fix this bug, and the
aforementioned error is no longer returned. (BZ#1085938)

• Prior to this update, Link Aggregation Control Protocol (LACP) active runner

was incorrectly selecting incorrect aggregator on port activation. As a
consequence, the link of current active port was dropped. This update fixes LACP
aggregator behavior, and the selection process now proceeds correctly.
(BZ#1089256)

• Previously, the actor "system" value was set to a MAC address which was

afterwards set to the team device during the team initialization. If that was
changed later on, the teamd daemon sent Link Aggregation Control Protocol Data
Units (LACPDUs) with the old MAC. An upstream patch has been backported to fix
this bug, and teamd now sends only correct MAC addresses. (BZ#1090578)

• When downing or reactivating a connection in NetworkManager, the teamd

instance managing the link terminated unexpectedly. As a consequence, the whole
process group was terminated. The underlying source code has been patched, and
pgroup no longer crashes in the described scenario. (BZ#1160615)

• The teamd daemon writes messages to standard errors, depending on the

verbosity level. However, writing to a closed standard error caused the SIGPIPE
signal to be returned, which consequently terminated teamd. With this update,
teamd ignores SIGPIPE, thus fixing this bug. (BZ#1173632)

In addition, this update adds the following enhancements:

• With this update, the ifup-eth and ifdown-eth scripts are able to use the ifup

and ifdown scripts, so that the teamd initscripts can be executed directly from
ifup-eth and ifdown-eth. (BZ#1082522)

• This update adds the "debug_level" configuration option, so now it is possible

to obtain more verbose logs for troubleshooting purposes. (BZ#1086383)

• This update adds the missing security-related compile-time flags, PIE and full

RELRO, to the libteam packages. These flags bring security benefits for
long-running executables, and thus are required to be used for daemons in Red
Hat Enterprise Linux. (BZ#1092549)

Users of libteam 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 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 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 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 Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• 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 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
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64

Fixes

• BZ - 1085938 - teamd: fix port remove by ctl (teamdctl) when take-over is on
• BZ - 1116970 - rebase libteam packages to version 1.15
• BZ - 1125296 - Generate doxygen documentation

CVEs

(none)

References

(none)