RHBA-2014:1409 - Bug Fix Advisory

Topic

Updated device-mapper-persistent-data packages that fix one bug and add two
enhancements are now available.

Description

The device-mapper-persistent-data packages provide device-mapper thin
provisioning (thinp) tools.

This update adds thin provisioning tools to support the dm-cache, as well as the
dm-era functionality for change tracking to the device-mapper-persistent-data
packages in Red Hat Enterprise Linux 6 as a Technology Preview. (BZ#1038236,
BZ#1084081)

More information about Red Hat Technology Previews is available here:
https://access.redhat.com/support/offerings/techpreview/

In addition, this update fixes the following bug:

• The thin_dump utility as well as other persistent-data tools supported only

512 B block sizes on accessed devices. Consequently, persistent-data tools could
perform I/O to misaligned buffers. The underlying source code has been updated
to support 4 KB block size, thus fixing this bug. (BZ#1035990)

Users of device-mapper-persistent-data are advised to upgrade to these updated
packages, which fix this bug and add 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/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 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 6 x86_64
• 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 - 1035990 - thin_dump and other persistent-data tools may perform IO to misaligned buffers on devices with block sizes larger than 512 bytes
• BZ - 1038236 - add dm-cache support to RHEL 6 - userspace components [Technology Preview]
• BZ - 1084081 - device-mapper-persistent-data: add critical needs_check flag and new era tools [technology preview]

CVEs

(none)

References

(none)