[Ksplice-cloudlinux6-updates] New updates available via Ksplice (2.6.32-320.17.1.lve1.1.7.2)

[Jamie Iles]

Synopsis: 2.6.32-320.17.1.lve1.1.7.2 can now be patched using Ksplice
CVEs: CVE-2011-4086 CVE-2012-1601

Systems running CloudLinux 6 can now use Ksplice to patch against the
latest CloudLinux 6 kernel update, 2.6.32-320.17.1.lve1.1.7.2.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on CloudLinux 6 install
these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* Kernel crash on PLOOP device unmount.

An incorrect reference counting triggered at an unmount of a PLOOP
device would cause a kernel crash after the unmount.


* Memory leak on I/O in the PLOOP device.

An invalid handling of synchronous write requests would cause the leak
of such requests during regular device I/O.


* Denial of service due to race condition in the scheduler subsystem.

A race condition between exiting a task on one CPU and waking it up by a
different CPU can cause a kernel panic when the second task will try
waking up a dead task.


* CVE-2011-4086: Denial of service in journaling block device.

The journal block device assumed that a buffer marked as unwritten
or delay could be live without checking if the buffer was mapped.

An unprivileged local user could use this flaw to crash the system.


* CVE-2012-1601: Denial of service in KVM VCPU creation.

Inconsistent state in the creation of KVM virtual CPU's could
lead to NULL pointer dereferences.  A unprivileged local user
could use this flaw to crash the system.


* Incorrect access restrictions to character devices.

The whitelist of character devices that a VE instance could access was
not complete and could allow a VE user to access the watchdog device and
reboot the host.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.