The kvm_vm_ioctl_assign_device function in virt/kvm/assigned-dev.c in
the KVM subsystem in the Linux kernel before 3.1.10 does not verify
permission to access PCI configuration space and BAR resources, which
allows host OS users to assign PCI devices and cause a denial of
service (host OS crash) via a KVM_ASSIGN_PCI_DEVICE operation.
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