Article ID: 114447, created on Jul 26, 2012, last review on May 11, 2014

  • Applies to:
  • Virtuozzo containers for Linux 4.7
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Synopsis:          New Parallels Virtuozzo Containers 4.7 kernel provides
                   an update with security and stability fixes.
Product:           Parallels Virtuozzo Containers 4.7
Keywords:          "bugfix" "stability" "security"

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This document provides information on the new Parallels Virtuozzo Containers 4.7 kernel,
version 2.6.32-042stab059.7.

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TABLE OF CONTENTS

1. About This Release
2. Updates Description
3. Obtaining New Kernel
4. Installing New Kernel
5. Required RPMs
6. References

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1. ABOUT THIS RELEASE

The current update for the Parallels Virtuozzo Containers (PVC) 4.7 kernel provides a new
kernel based on the Red Hat Enterprise Linux 6.3 kernel (2.6.32-279.1.1.el6).
The updated kernel includes a number of security and stability fixes.

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2. UPDATES DESCRIPTION

This update contains fixes for the following issues:

* Pre-online migration checks have been enhanced. Messages reported if some
  issues are detected preventing online migration have been made more user
  friendly. (PSBM-13676)

* The Open vSwitch kernel module has been added to the Parallels Virtuozzo
  Containers 4.7 kernel. (PSBM-10295)

* The GRO feature is now enabled by default in the "benet" network card driver.
  With the GRO feature disabled, some network cards supported by the "benet"
  driver could drop TCP/UDP incoming traffic. (PSBM-13817)

* Under certain circumstances, the sys_clock_gettime(CLOCK_MONOTONIC) call could
  return a non-monotonic value in a Container that was migrated online to
  another Hardware Node. (PSBM-13860)

* Under certain circumstances, the Source Node could leak swap entries allocated
  by a Container that was migrated to another Hardware Node using the online
  migration type. (PCLIN-30780)

* Sometimes, renaming a network interface on a Hardware Node could fail.
  (PSBM-14016)

* A kernel panic could occur in the journal_commit_transaction() function.
  (PCLIN-30972)

* A possible deadlock in the memory reclaimer code has been fixed. (PSBM-14021)

* When migrating a Container using the online migration type, a kernel panic
  could occur on the Destination Node if the CPUs on the Source Node had the
  "xsave" feature, while the CPUs on the Destination Node did not have this
  feature, and the administrator forced the migration, disregarding the
  respective warning messages. (PCLIN-31031, OVZ 2275)

* The cgroups code has been reworked to fix possible deadlocks and crashes.
  (OVZ 2278)

* A kernel panic could occur when mounting an NFS volume in the case of memory
  shortage. (PCLIN-31080)

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3. OBTAINING NEW KERNEL

You can download and install this kernel update using the vzup2date utility
included in the Parallels Virtuozzo Containers 4.7 distribution set.

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4. INSTALLING NEW KERNEL

To install the update, do the following:

I. Use the "rpm -ihv" command to install the new kernel and PVC modules.

# rpm -ivh vzkernel-2.6.32-042stab059.7.i686.rpm \
vzmodules-2.6.32-042stab059.7.i686.rpm
Preparing...                ################################# [100%]
    1:vzkernel               ################################# [50%]
    2:vzmodules              ################################# [100%]

    Please DO NOT USE the "rpm -Uhv" command to install the kernel. Otherwise,
    all the kernels previously installed on your system may be removed from
    the Hardware Node.

II. You can adjust your boot loader configuration file to have the new kernel
    loaded by default. If you use the LILO bootloader, please do not forget to
    execute the "lilo" command to write the changes to the boot sector:

     # lilo
     Added Virtuozzo2 *
     Added Virtuozzo1
     Added linux
     Added linux-up

III. Reboot your computer with the "shutdown -r now" command to boot the new
     kernel.

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5. REQUIRED RPMS

Depending on the processor installed on the Hardware Node, the following RPM
packages are included in the kernel update:

x86 kernels:

- SMP:
   vzkernel-2.6.32-042stab059.7.i686.rpm
   vzmodules-2.6.32-042stab059.7.i686.rpm

- Enterprise:
   vzkernel-ent-2.6.32-042stab059.7.i686.rpm
   vzmodules-ent-2.6.32-042stab059.7.i686.rpm

- Enterprise with the 4GB split feature disabled:
   vzkernel-PAE-2.6.32-042stab059.7.i686.rpm
   vzmodules-PAE-2.6.32-042stab059.7.i686.rpm


x86_64 kernels:

- SMP:
   vzkernel-2.6.32-042stab059.7.x86_64.rpm
   vzmodules-2.6.32-042stab059.7.x86_64.rpm

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6. REFERENCES

http://rhn.redhat.com/errata/RHSA-2012-0862.html
https://www.redhat.com/security/data/cve/CVE-2011-1083.html
https://www.redhat.com/security/data/cve/CVE-2011-4131.html

http://rhn.redhat.com/errata/RHSA-2012-1064.html
https://www.redhat.com/security/data/cve/CVE-2012-2744.html
https://www.redhat.com/security/data/cve/CVE-2012-2745.html

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Copyright (c) 1999-2012 Parallels Holdings, Ltd. and its affiliates. All rights
reserved.

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