RHBA-2012:0835 - Bug Fix Advisory

Topic

An updated iproute package that fixes two bugs and adds three enhancements is
now available for Red Hat Enterprise Linux 6.

Description

The iproute package contains networking utilities (ip and rtmon, for example),
which are designed to use the advanced networking capabilities of the Linux
kernel.

This updated iproute package provides fixes for the following bugs:

• The ip6tunnel mode command passed a zeroed parameter structure to the kernel,

which attempted to change all tunnel parameters to zero and failed.
Consequently, users could not change ip6tunnel parameters. With this update, the
ip6tunnel code has been changed so that it updates only the changed parameters.
As a result, it is now possible for users to adjust ip6tunnel parameters as
expected. (BZ#730627)

• The lnstat utility used an incorrect file descriptor for its dump output.

Consequently, the lnstat utility printed its dump output to stderr rather than
to stdout. The code has been fixed and lnstat now prints its dump output to
stdout. (BZ#736106)

In addition, this updated package provides the following enhancements:

• The tc utility (a traffic control tool) has been enhanced to allow users to

work with the Multi-queue priority (MQPRIO) Queueing Discipline (qdiscs)
scheduler. With MQPRIO qdiscs, QOS can be offloaded from NICs that support
external QOS schedulers. As a result, it is now possible for users to monitor
traffic classes, gather statistics, set socket-buffer (SKB) priority and
socket-priority-to-traffic-class mapping. (BZ#748767)

• The tc utility has been updated to work with Quick Fair Queueing (QFQ) kernel

features. Users can now take advantage of the new QFQ-traffic scheduler from
user space. (BZ#788120)

• This update adds support for multiple multicast routing tables. (BZ#812779)

Users are advised to upgrade to this updated iproute package, which fixes these
bugs and adds these enhancements.

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/knowledge/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 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 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 730627 - can't change hoplimit of tunnel device in ip6ip6 mode

CVEs

(none)

References

(none)