Sean Christopherson <seanjc@xxxxxxxxxx> writes:
> When looking for a "mangled", i.e. dynamic, CPUID entry, terminate the
> walk based on the number of array _entries_, not the size in bytes of
> the array. Iterating based on the total size of the array can result in
> false passes, e.g. if the random data beyond the array happens to match
> a CPUID entry's function and index.
>
> Fixes: fb18d053b7f8 ("selftest: kvm: x86: test KVM_GET_CPUID2 and guest visible CPUIDs against KVM_GET_SUPPORTED_CPUID")
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> ---
> tools/testing/selftests/kvm/x86_64/cpuid_test.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/kvm/x86_64/cpuid_test.c b/tools/testing/selftests/kvm/x86_64/cpuid_test.c
> index 8c579ce714e9..fec03b11b059 100644
> --- a/tools/testing/selftests/kvm/x86_64/cpuid_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/cpuid_test.c
> @@ -60,7 +60,7 @@ static bool is_cpuid_mangled(const struct kvm_cpuid_entry2 *entrie)
> {
> int i;
>
> - for (i = 0; i < sizeof(mangled_cpuids); i++) {
> + for (i = 0; i < ARRAY_SIZE(mangled_cpuids); i++) {
> if (mangled_cpuids[i].function == entrie->function &&
> mangled_cpuids[i].index == entrie->index)
> return true;
Reviewed-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
--
Vitaly
