Article ID: 119967, created on Feb 3, 2014, last review on Apr 29, 2014

  • Applies to:
  • Virtuozzo 6.0

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Synopsis:          A new Parallels Cloud Server 6.0 kernel update
                   addressing security and stability issues.
Product:           Parallels Cloud Server 6.0
Keywords:          'bugfix' 'stability' 'security'

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This document provides information on the new Parallels Cloud Server 6.0 kernel,
version 2.6.32-042stab084.20.

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CONTENTS

1. About This Update
2. Update Description
3. Obtaining the New Kernel

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1. ABOUT THIS UPDATE

The current update for the Parallels Cloud Server 6.0 kernel provides a new
kernel based on the Red Hat Enterprise Linux 6.4 kernel (2.6.32-358.23.2.el6).
The updated kernel includes a number of security and stability fixes.

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2. UPDATE DESCRIPTION

This update includes the following fixes and improvements:

* Kernel crashes due to intensive use of conntracks inside a Container. Kernel
  memory corruption caused by races in conntrack initialization and incorrect
  freeing, which is triggered by a very specific load from inside Containers
  with conntracks enabled. (PCLIN-32278, PCLIN-31920, PCLIN-32220, OVZ# 2851)

* Fusion-io's ioMemory Virtual Storage Layer driver kernel module (iomemory-vsl)
  failed to compile due to hardcoded size of kernel struct file_operations.
  (PCLIN-32299)

* A race condition on relocation of blocks in ploop code could lead to a kernel
  panic. (PSBM-23905)

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3. OBTAINING THE NEW KERNEL

You can download and install this kernel update using the yum utility included
in the Parallels Cloud Server 6.0 distribution set.

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Copyright (c) 1999-2014 Parallels IP Holdings GmbH and its affiliates. All
rights reserved.

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