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authorAvi Kivity <avi@redhat.com>2012-03-05 14:23:29 +0200
committerAvi Kivity <avi@redhat.com>2012-03-08 14:10:30 +0200
commit3e515705a1f46beb1c942bb8043c16f8ac7b1e9e (patch)
treefd0e53e5f51e6e03dda80d7aec6073f5cb694fd1 /virt/kvm/assigned-dev.c
parent4cee4798a304ee1ea579423ca048f16ceaccdfb5 (diff)
downloadlinux-linaro-stable-3e515705a1f46beb1c942bb8043c16f8ac7b1e9e.tar.gz
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 <michael@ellerman.id.au> Signed-off-by: Avi Kivity <avi@redhat.com>
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