RHBA-2018:0183 - Bug Fix Advisory

Topic

Updated keepalived packages that fix one bug are now available for Red Hat Enterprise Linux 7.3 Extended Update Support.

Description

The keepalived utility provides simple and robust facilities for load balancing
and high availability. The load balancing framework relies on the well-known and
widely used IP Virtual Server (IPVS) kernel module providing layer-4 (transport
layer) load balancing. Keepalived implements a set of checkers to dynamically
and adaptively maintain and manage a load balanced server pool according to the
health of the servers. Keepalived also implements the Virtual Router Redundancy
Protocol (VRRPv2) to achieve high availability with director failover.

This update fixes the following bug:

• Previously, open pipes were not closed properly when the keepalived process received the SIGHUP signal. As a consequence, every time keepalived received SIGHUP, two new pipes were created while the existing pipes were not closed. This bug has been fixed by using the pipe2() system call with the O_CLOEXEC flag. As a result, the number of open pipes no longer grows with every SIGHUP signal. (BZ#1477907)

Users of keepalived are advised to upgrade to these updated packages, which fix this bug.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.3 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64

Fixes

• BZ - 1477907 - Configuration reload (SIGHUP) opens two (never closed) new pipes in subprocess [rhel-7.3.z]

CVEs

(none)

References

(none)