Red Hat ENTERPRISE LINUX 5.5 - S 2010, Manual

Page: 151 / 470

RHSA-2010:0271: Important security, bug fix and enhancement update
141
• KVM did not change the pacakge address of the
etherboot
.zrom
file. KVM would always used the
default, the
ne.zrom
file. Guests could not get an IP address or access PXE servers. The updated
packages resolve this issue and guests can access PXE server when using non-default network
devices. (
BZ#526124
1289
)
• KVM could generate invalid memory types in Memory Type Range Registers (MTRR) and Page
Attribute Tables (PAT). This could be used by guests running random code to possibly store (and
later use) a random MTRR type. The updated package prevent these invalid memory types from
being created. (
BZ#526837
1290
)
• An error in the Makefile prevented users from using the source RPM to install KVM.
(
BZ#527722
1291
)
• Linux guest
initrd
images greater than 4GB would cause the guest to crash. KVM now limits the
size of
initrd
images to less than 4GB. (
BZ#529694
1292
)
• If the
qemu-kvm
command's
-net user
option was used, unattended Windows XP installations
would not receive an IP address after rebooting. The guest requests a second DHCP address which
makes the list of free DHCP addresses run out much quicker. This issue is fixed by reassigning the
same addressed requested with DHCP to the guest after the guest reboots. (
BZ#531631
1293
)
• The para-virtualized clock (pvclock) Mode-specific register values were not preserved after a
migration. This issue also affected the para-virtualized clock when a guest was saved and restored.
These drivers not being saved could cause the guest's time keeping to become significantly skewed
after restoring or migrating the guest. In the updated packages, the MSR values are preserved when
a guest is saved and restored, and for migrations. (
BZ#531701
1294
)
• Installing Windows Server 2008 R2 from an ISO image could result in a blue screen
"
BAD_POOL_HEADER
" stop error. (
BZ#531887
1295
)
• Running certain test functions on Windows 7 guests caused a blue screen
"
HAL_RTC_IRQF_WILL_NOT_CLEAR
" stop error. (
BZ#556455
1296
)
• Windows Server 2003 R2 Service Pack 2 32-bit guests using the para-virtualized block drivers could
crash with an
unhandledvm exit
error during reboot. The hypervisor now handles this error,
resolving the issue. (
BZ#532086
1297
)
• After restoring a migrated Windows Server 2008 R2 guest, a race condition caused the
guest to hang during the shut down sequence. The updated packages resolve this issue and
Windows Server 2008 R2 guests will successfully shut down when requested after a migration.
(
BZ#533090
1298
)
• a bug in the
grow_refcount_table()
error handling caused infinite recursion in some cases.
This caused the
qemu-kvm
process to hang and eventually crash. (
BZ#537075
1299
)
• Full I/O error codes were not passed up to the host or the Red Hat Enterprise Virtualization
Manager. Accurate I/O error codes are now forwarded to the user and management tools.
(
BZ#537077
1300
)
• There was a regression in the
qemu-img
command, Fibre Channel devices could not be formatted
using RAW or use preallocated RAW devices. The
qemu-img
command is updated to handle Fibre
Channel devices in the RAW format. (
BZ#537655
1301
)