Ack :Re: [RESEND] [PATCH 0/2] [CVE-2012-1601] KVM: Ensure all vcpus are consistent with in-kernel irqchip

[Herton Ronaldo Krzesinski]

On Thu, Apr 26, 2012 at 09:37:37AM -0700, Brad Figg wrote:
> CVE-2012-1601
> 
> BugLink: http://bugs.launchpad.net/bugs/971685
> 
> If some vcpus are created before KVM_CREATE_IRQCHIP, then
> irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading
> to potential NULL pointer dereferences.
> 
> Fix by:
> - ensuring that no vcpus are installed when KVM_CREATE_IRQCHIP is called
> - ensuring that a vcpu has an apic if it is installed after KVM_CREATE_IRQCHIP
> 
> This is somewhat long winded because vcpu->arch.apic is created without
> kvm->lock held.
> 
> Signed-off-by: Brad Figg <brad.figg at canonical.com>
> -- 
> 1.7.9.5
> 
> 
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> 

-- 
[]'s
Herton