RHBA-2014:1228 - Bug Fix Advisory

Topic

Updated device-mapper-multipath packages that fix several bugs are now available
for Red Hat Enterprise Linux 5.

Description

The device-mapper-multipath packages provide tools for managing multipath
devices using the device-mapper multipath kernel module.

This update fixes the following bugs:

• A bug in Device Mapper Multipath (DM-Multipath) allowed the main multipathd

thread to free memory that was still being used by other multipathd threads
during system shutdown. Consequently, the multipathd daemon terminated
unexpectedly due to use-after-free memory corruption. This update avoids this
problem by ensuring that memory being used by multipathd threads is freed in the
final cleanup upon the exit of multipathd. (BZ#1092603)

• DM-Multipath allowed configurations with duplicate name aliases mapped to

different World Wide Identifiers (WWIDs). However, such configurations could
result in path corruption when a device was reloaded and used the paths of
another device. This update ensures that DM-Multipath refuses to reload a device
if its alias matches another device. DM-Multipath now also warns the user on
potentially conflicting aliases. (BZ#1039935)

• The multipathd daemon could attempt to reconfigure before it was completely

set up after receiving the SIGHUP signal on startup. As a consequence,
multipathd terminated unexpectedly with a segmentation fault. With this update,
multipathd now blocks the SIGHUP signal until it has completed its
initialization. (BZ#1086949)

Users of device-mapper-multipath are advised to upgrade to these updated
packages, which fix these bugs.

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/site/articles/11258

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 - 489499 - Docu Bug manpage multipathd miss -k option
• BZ - 560955 - device-mapper-multipath src.rpm does not contain pristine tarball
• BZ - 798543 - device-mapper-multipath: standard rpm cflags not used during build [rhel-5]
• BZ - 1086949 - If multipathd is reconfigured before it starts completely up, it will crash.

CVEs

(none)

References

(none)