RHBA-2007:0872 - Bug Fix Advisory

Topic

An updated yaboot package that fixes a bug is now available.

Description

The yaboot package is a bootloader for Open Firmware-based PowerPC
machines. It can be used to boot IBM pSeries machines.

This updated package includes the following fix:

• if "Local CD-ROM" was selected as the install medium (ie when installing

via CD or DVD), the install application would return a 'No driver found'
error.

A workaround involved clearing the NVRAM. This workaround reset the
real-base address used by Open Firmware for itself to 0xc00000, from
0x2000000. This latter address is used by Open Firmware after any firmware
update or the installation of another operating system, such as AIX.

When the Open Firmware starting address is 0x2000000, the linux kernel
cannot load all necessary modules including, in this case, the USB-DVD
driver.

With this update, yaboot now attempts to load the linux kernel at
0x00C00000 and climbs the stack looking for open space if there is overlap.
Consequently, the kernel is not squeezed, even in AIX/Red Hat Enterprise
Linux dual-boot setups.

All PowerPC yaboot users are advised to upgrade to this updated package,
which addresses this issue.

Solution

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

CVEs

(none)

References

(none)