Issued:

2015-12-16

Updated:

2015-12-16

RHBA-2015:2654 - udev bug fix update

Synopsis

udev bug fix update

Type/Severity

Bug Fix Advisory

Topic

Updated udev packages that fix two bugs are now available for Red Hat Enterprise Linux 6.

Description

The udev packages implement a dynamic device-directory, providing only the devices present on the system. This dynamic directory runs in user space, dynamically creates and removes devices, provides consistent naming, and a user-space API. The udev packages replace the devfs package and provide better hot plug functionality.

This update fixes the following bugs:

• Module autoloading was previously turned on for every device, even if a driver for the device was already loaded, because Intelligent Platform Management Interface (IPMI) devices required this setting. Consequently, too many modprobe instances were executed. This update allows modprobe for IPMI devices only if a driver is already loaded, and module autoloading thus works as expected. Now, all other drivers are not accessed again, which results in a decrease in workload. (BZ#1281467)

• Previously, the modprobe execution could be done in parallel with an infinite number of other modprobe executions, which led to hundreds of modprobes running in parallel. This update limits the maximum number of workers which are spawned additionally to the count governed by the max_childs setting. Note that it is highly recommended to adjust the size of the kernel log buffer when logging to a serial console (log_buf_len=4M on kernel command line), as affected systems are able to boot even without any fixes now provided. (BZ#1281469)

Users of udev are advised to upgrade to these updated packages, which fix these bugs.

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

Updated Packages

• libudev-devel-147-2.63.el6_7.1.ppc.rpm
• udev-147-2.63.el6_7.1.i686.rpm
• libudev-147-2.63.el6_7.1.s390.rpm
• libgudev1-147-2.63.el6_7.1.i686.rpm
• udev-147-2.63.el6_7.1.x86_64.rpm
• udev-147-2.63.el6_7.1.s390x.rpm
• libgudev1-147-2.63.el6_7.1.ppc.rpm
• udev-147-2.63.el6_7.1.ppc64.rpm
• libudev-147-2.63.el6_7.1.ppc.rpm
• libudev-devel-147-2.63.el6_7.1.ppc64.rpm
• libgudev1-devel-147-2.63.el6_7.1.s390x.rpm
• libgudev1-147-2.63.el6_7.1.s390.rpm
• libgudev1-devel-147-2.63.el6_7.1.i686.rpm
• udev-debuginfo-147-2.63.el6_7.1.ppc64.rpm
• libgudev1-147-2.63.el6_7.1.ppc64.rpm
• udev-147-2.63.el6_7.1.src.rpm
• libgudev1-devel-147-2.63.el6_7.1.s390.rpm
• libudev-devel-147-2.63.el6_7.1.i686.rpm
• libudev-devel-147-2.63.el6_7.1.s390.rpm
• libgudev1-147-2.63.el6_7.1.x86_64.rpm
• udev-debuginfo-147-2.63.el6_7.1.s390.rpm
• libudev-147-2.63.el6_7.1.s390x.rpm
• udev-debuginfo-147-2.63.el6_7.1.i686.rpm
• libudev-147-2.63.el6_7.1.i686.rpm
• libudev-devel-147-2.63.el6_7.1.x86_64.rpm
• libudev-147-2.63.el6_7.1.x86_64.rpm
• udev-debuginfo-147-2.63.el6_7.1.ppc.rpm
• libgudev1-devel-147-2.63.el6_7.1.x86_64.rpm
• libudev-147-2.63.el6_7.1.ppc64.rpm
• udev-debuginfo-147-2.63.el6_7.1.x86_64.rpm
• udev-debuginfo-147-2.63.el6_7.1.s390x.rpm
• libudev-devel-147-2.63.el6_7.1.s390x.rpm
• libgudev1-devel-147-2.63.el6_7.1.ppc.rpm
• libgudev1-devel-147-2.63.el6_7.1.ppc64.rpm
• libgudev1-147-2.63.el6_7.1.s390x.rpm

Fixes

(none)

CVEs

(none)

References

(none)

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.