[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELBA-2019-4774)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2019-4774 can now be patched using Ksplice

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2019-4774.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2019-4774.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and OL7 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

* Network TUN device creation failure with formatted names.

Incorrect error handling when creating TUN devices could result in false
positives when using formatted names and failure to create the device.

Orabug: 30085611


* SUNRPC failure during NFS secure unmounting.

Incorrect error handling could result in unhandled errors in the
SUNRPC subsystem and subsequent I/O failures.

Orabug: 29926734


* Improved Spectre v2 vulnerability message on non-retpoline module loading.

The kernel tainting for loading a non-retpoline enabled kernel module on
a retpoline kernel could lead to reporting errors for Spectre v2
vulnerability.  The vulnerability reporting now includes information
about retpoline being enabled but non-retpoline modules being loaded.

Orabug: 30185537


* Use-after-free in Xen network backend receive path.

Incorrect locking could result in races between interrupts when
processing received data leading to a use-after-free and potential
kernel crash.

Orabug: 30223112


* Kernel IO hang during directory entry cache shrinking.

Missing scheduler calls when performing directory entry cache shrinking
could result in an IO stall and subsequent kernel hang under heavy IO
load.

Orabug: 30101895


* Incorrect IPv4 address reporting in rds-info.

A logic error when reading IPv4 addresses with rds-info could result in
all IP addresses being returned as 0.0.0.0.

Orabug: 30022915

SUPPORT

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