RHBA-2011:0795 - Bug Fix Advisory

Topic

An updated libnl package that fixes various bugs is now available.

Description

This package contains a convenience library to simplify using the Linux
kernel's netlink sockets interface for network manipulation.

This update addresses the following issues:

• When a domain started under libvirt, a memory leak was triggered from

the libnl library because libnl continued to use memory no longer in
use. Memory leaks in libnl are now fixed and libnl releases memory after
it completes usage. (BZ#620345)

• The port allocation/de-allocation was not safe in multi-threaded

applications and the logic was incorrect, which resulted in some
applications and other libraries being unable to initialize libnl.
Port allocation/de-allocation and logic is now fixed, and libnl can
now be initialized. (BZ#677724) (BZ#677725)

All libnl users should upgrade to this updated package, which
resolves these issues.

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/kb/docs/DOC-11259

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
• 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 - 620345 - multiple memory leaks in libnl
• BZ - 677724 - port allocation/deallocation needs to be made thread-safe
• BZ - 677725 - port allocation/deallocation is wrong [in libnl-1.1-12]

CVEs

(none)

References

(none)