[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELBA-2019-4587)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2019-4587 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-2019-4587.

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

* Denial-of-service when umounting a filesystem with many dentries in the dentry cache.

A logic error when unmounting a filesystem with many dentries in the
dentry cache could lead to a soft lockup. A local attacker could use
this flaw to cause a denial-of-service.

Orabug: 29412146


* Incorrect steal time reporting on hotplugged Xen virtual CPUs.

An overflow error when computing Xen virtual CPU steal time could lead
to a wrong steal time.

Orabug: 28806208

SUPPORT

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