Bug the VM and terminate emulation if an out-of-bounds read into the
emulator's data cache occurs.  Knowingly contuining on all but guarantees
that KVM will overwrite random kernel data, which is far, far worse than
killing the VM.
Signed-off-by: NSean Christopherson <seanjc@google.com>
Reviewed-by: NKees Cook <keescook@chromium.org>
Reviewed-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220526210817.3428868-9-seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>