RHBA-2012:1399 - Bug Fix Advisory

Topic

Updated lvm2 packages that fix several bugs are now available for Red Hat
Enterprise Linux 6.

Description

The lvm2 packages provide support for Logical Volume Management (LVM).

This update fixes the following bugs:

• When using a physical volume (PV) that contained ignored metadata areas, an

LVM command, such as pvs, could incorrectly display the PV as being orphan
despite it belonged to a volume group (VG). This incorrect behavior was also
dependent on the order of processing each PV in the VG. With this update, the
processing of PVs in a VG has been fixed to properly account for PVs with
ignored metadata areas so that the order of processing is no longer important,
and LVM commands now always give the same correct result, regardless of PVs with
ignored metadata areas. (BZ#843808)

• Previously, if the "issue_discards=1" configuration option was used with an

LVM command, moving physical volumes using the pvmove command resulted in data
loss. This update fixes the bug in pvmove and the data loss no longer occurs in
the described scenario. (BZ#852438)

• When the "--alloc anywhere" command-line option was specified for the lvcreate

command, an attempt to create a logical volume failed if "raid4", "raid5", or
"raid6" was specified for the "--type" command-line option as well. A patch has
been provided to address this bug and lvcreate now succeeds in the described
scenario. (BZ#852440)

• An error in the way RAID 4/5/6 space was calculated, was preventing users from

being able to increase the size of these logical volumes. This update provides a
patch to fix this bug but it comes with two limitations. Firstly, a RAID 4/5/6
logical volume cannot be reduced in size yet. Secondly, users cannot extend a
RAID 4/5/6 logical volume with a different stripe count than the original.
(BZ#852441)

• If the "issue_discards=1" configuration option was set in the

/etc/lvm/lvm.conf file, it was possible to issue a discard request to a PV that
was missing in a VG. Consequently, the dmeventd, lvremove, or vgreduce utilities
could terminate unexpectedly with a segmentation fault. This bug has been fixed
and discard requests are no longer issued on missing devices. As the discard
operation is irreversible, in addition to this fix, a confirmation prompt has
been added to the lvremove utility to ask the user before discarding a LV, thus
increasing robustness of the discard logic. (BZ#867009)

Users of lvm2 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/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 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 IBM z Systems - Extended Update Support 6.3 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.3 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Resilient Storage for x86_64 6 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 6 i386
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 6.3 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 6.3 i386
• 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 Update Support from RHUI 6.3 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 i386
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 6 x86_64
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 6 i386
• 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 - 843808 - vgname missing from pvs output when PV contains ignored mda
• BZ - 852438 - pvmove cannot be used with lvm.conf option issue_discards
• BZ - 852440 - --alloc anywhere only works with raid1, not raid4, raid5, or raid6
• BZ - 852441 - unable to extend a striped raid (4|5|6)
• BZ - 867009 - segfault in dmeventd, lvremove, vgreduce when removing part of an LV on a missing PV with issue_discards enabled

CVEs

(none)

References

(none)