[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELBA-2020-5675)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2020-5675 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-2020-5675.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2020-5675.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

* Soft lockup when multiple threads read /proc/stat simultaneously.

An invalid locking assumption in kstat_irqs_user() could result in
significant lock contention when multiple readers access /proc/stat at
the same time, resulting in severe performance degradation.

Orabug: 30953676

SUPPORT

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