RHBA-2020:0777 - Bug Fix Advisory

Topic

An updated gluster-block package that fixes one bug is now available for Red Hat OpenShift Container Storage 3.11 Batch 5 Update.

Description

gluster-block is a distributed management framework for block devices, provided as a command-line utility. It aims to make Gluster-backed block storage creation and maintenance as simple as possible. gluster-block can provision block devices and export them as iSCSI LUNs across multiple nodes and uses iSCSI protocol for data transfer as SCSI block/commands.

Block storage allows the creation of high-performance individual storage units unlike the traditional file storage capability that glusterfs supports, each storage volume/block device can be treated as an independent disk drive so that each storage volume/block device can support an individual file system.

This advisory fixes the following bug:

• With Red Hat OpenShift Container Storage 3.11 Update 5, a create block volume operation followed with the delete block volume operation on a given block hosting volume caused tcmu-runner service to crash with SEGV. This is caused due to memory corruption in glusterfs when global memory structures were destroyed and reinitialized as part of glfs_init() and glfs_fini(). As tcmu-runner uses gfapi library, it is the one that will receive SEGV signal. Now, with this update, memory pool management races were fixed in the core glusterfs, hence no crashes will be observed by tcmu-runner or gluster-block daemons. (BZ#1804656)

Users of Red Hat OpenShift Container Storage are advised to upgrade to these updated packages, which fixes 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 Gluster Storage Server for On-premise 3 for RHEL 7 x86_64

Fixes

• BZ - 1804656 - gfapi: tcmu-runner receives SEGV on calling glfs_init() after glfs_fini()

CVEs

(none)

References

(none)