From: Avi Kivity Date: Mon, 5 Mar 2012 12:23:29 +0000 (+0200) Subject: KVM: Ensure all vcpus are consistent with in-kernel irqchip settings X-Git-Tag: v3.4-rc1~59^2~12 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e515705a1f46beb1c942bb8043c16f8ac7b1e9e;p=pandora-kernel.git KVM: Ensure all vcpus are consistent with in-kernel irqchip settings 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. Based on earlier patch by Michael Ellerman. Signed-off-by: Michael Ellerman Signed-off-by: Avi Kivity --- Reading git-diff-tree failed