RHBA-2009:0094 - Bug Fix Advisory

Topic

Updated dbus packages that fix a bug and add enhancements are now
available.

Description

D-Bus is a system for sending messages between applications. It is used
both for the system-wide message bus service, and as a
per-user-login-session messaging facility.

In certain cases, if a process listened for D-Bus messages in one thread,
while at the same time sending messages to the D-Bus daemon from another
thread, the process could hang or crash. This update fixes incorrect POSIX
threads (pthreads) locking and clean up issues in the D-Bus libraries,
which caused this problem.

The system bus now supports starting services on demand in the same manner
as the session bus already does. This allows privileged services to be
started only when they are needed, and exit when they are finished
processing their requests, making more efficient use of system resources.

Also, these updated packages upgrade D-Bus to version 1.1.2. Refer to the
D-Bus 1.1.2 changelog for information about bug fixes and enhancements not
listed here:

http://webcvs.freedesktop.org/dbus/dbus/ChangeLog?view=co&pathrev= DBUS_1_1_2

Users are advised to upgrade to these updated packages, which resolve this
issue and add these enhancements.

Solution

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 463278 - Incorrect D-Bus system bus user ID in system.conf

CVEs

(none)

References

(none)