CVE ID:	CVE-2011-4622
Description:	The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.
Test IDs:	1.3.6.1.4.1.25623.1.0.702389   1.3.6.1.4.1.25623.1.1.4.2015.0652.1   1.3.6.1.4.1.25623.1.0.123962
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2011-4622 1026559 http://www.securitytracker.com/id?1026559 51172 http://www.securityfocus.com/bid/51172 RHSA-2012:0051 http://www.redhat.com/support/errata/RHSA-2012-0051.html SUSE-SU-2012:0616 http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html [kvm] 20111214 [PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of irqchip support http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564 [oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the system http://www.openwall.com/lists/oss-security/2011/12/21/7 https://bugzilla.redhat.com/show_bug.cgi?id=769721 https://bugzilla.redhat.com/show_bug.cgi?id=769721 openSUSE-SU-2013:0925 http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html