RHBA-2014:1458 - Bug Fix Advisory

Topic

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

Description

The libguestfs packages contain a library, which is used for accessing and
modifying virtual machine (VM) disk images.

The virt-sysprep packages have been upgraded to upstream version 1.24.6, which
provides a number of enhancements over the previous version, namely new features
such as removing unnecessary files, including the possibility to specify custom
paths, and setting user passwords. (BZ#1037166)

This update also fixes the following bugs:

• The blockdev_setbsz API has been deprecated as the underlying implementation

("blockdev --setbsz") is no longer considered useful. (BZ#624335)

• Prior to this update, the gdisk utility was not available as a dependency on

the libguestfs library. Consequently, gdisk was not available, and thus
guestfs_part_get_gpt_type and guestfs_part_set_gpt_type APIs were not usable.
This update adds gdisk as a dependency, and thus is now available as well as the
aforementioned APIs. (BZ#965495)

• Due to the fstrim feature marked as available, calling the fstrim API returned

errors. As fstrim does not work with both the kernel and QEMU available in Red
Hat Enterprise Linux 6, this update disables fstrim. Now, calling the fstrim API
reports that fstrim is no longer available. (BZ#982979)

• Previously, when the virt-sparsify utility was run with a block or character

device as output, the output device was overwritten by a file,
or deleted. To fix this bug, if a block or character device is specified as
output, virt-sparsify refuses to run. (BZ#1056558)

• Due to wrong implementation of the Guestfs.new() constructor in the Ruby

binding, creating a new Guestfs instance often resulted in an error. With this
update, the implementation of Guestfs.new() has been rewritten, and Guestfs.new
now works correctly. (BZ#1072062)

• When running the tar-in guestfish command, or using the tar_in guestfs API,

with a non-existing input tar or to a non-existing destination directory, the
libguestfs appliance terminated unexpectedly. The error checking has been
approved, and the tar-in now cleanly returns an error. (BZ#1091805)

• Previously, the virt-sparsify utility did not check for free space available

in the temporary directory. Consequently, virt-sparsify became unresponsive if
the temporary directory lacked enough free space. With this update,
virt-sparsify checks by default for available space before the sparsification
operation, and virt-sparsify now works as intended. (BZ#1056558)

• Previously, particular permission checks for the root user in the FUSE layer

of the libguestfs library were missing. Consequently, mounting a disk image
using guestmount and accessing a directory as root with permissions 700 and not
owned by root failed with the "permission denied" error. With this update,
permissions have been disabled, and root can now access any directory of a disk
image mounted using guestmount. (BZ#1106548)

• The previous version of libguestfs library was not closing all the open file

descriptors when forking subprocesses such as QEMU. Consequently, if the parent
process or any non-libguestfs library did not atomically set the O_CLOEXEC flag
on file descriptors, the parent process leaked into QEMU, In OpenStack, this bug
also caused deadlocks, because Python 2 is unable to set O_CLOEXEC atomically.
With this update, libguestfs closes all the file descriptors before executing
QEMU, and deadlocks no longer occur. (BZ#1123794)

• Previously, the libguestfs library was skipping partitions with type 0x42,

Windows Lightweight Device Mounter (LDM) volumes, when LDM was not available.
Consequently, simple LDM volumes mountable as a single partition were ignored.
With this update, the partition detection is not skipped if LDM is missing, and
simple LDM volumes can now be recognized and mounted as plain NTFS partitions.
(BZ#1079182)

Users of libguestfs are advised to upgrade to these updated packages, which fix
these bugs 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/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Desktop 6 x86_64
• 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 - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 624335 - blockdev-setbsz succeeds, but does not affect blockdev-getbsz
• BZ - 965495 - New APIs required in libguestfs for virt-v2v in RHEL 6.5
• BZ - 982979 - Disable fstrim API/command in RHEL 6
• BZ - 1025269 - libguestfs tests hang in libguestfs-1.20.11/tests/guests/guest-aux/make-fedora-img.pl
• BZ - 1056558 - virt-sparsify overwrites block devices if used as output files
• BZ - 1057510 - mount-local should give a clearer error if root is not mounted
• BZ - 1072062 - Ruby bindings for libguestfs throws an error periodically
• BZ - 1079182 - virt-df cannot report used disk space of windows guest when updated to 6.5
• BZ - 1091805 - tar-in-opts execute failed that cause libguestfs appliance crashed
• BZ - 1097359 - virt-sparsify hangs with 'No space left on device' while filling LV
• BZ - 1099105 - libguestfs Requires: /lib64/libldif-2.4.so.2 missing from openldap-2.4.39-6.el6.x86_64
• BZ - 1099332 - typo errors in man pages
• BZ - 1106548 - root gets an error accessing to a non-root dir on a snapshot guestmount VMDK img
• BZ - 1117540 - Support virt-sparsify option to allow specifying temporary file or block device

CVEs

(none)

References

(none)