[ Upstream commit be7fcf1d1701a5266dd36eab4978476f63d1bd57 ]
The code is trying to check that all the padding is zeroed out and it does this:
entry->padding[0] == entry->padding[1] == entry->padding[2] == 0
Assume everything is zeroed correctly, then the first comparison is true, the next comparison is false and false is equal to zero so the overall condition is true. This bug doesn't affect run time very badly, but the code should instead just check that all three paddings are zero individually.
Also the error message was copy and pasted from an earlier error and it wasn't correct.
Fixes: 7edcb7343327 ("KVM: selftests: Add hyperv_cpuid test") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Vitaly Kuznetsov vkuznets@redhat.com Reviewed-by: Thomas Huth thuth@redhat.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c index 9a21e912097c..63b9fc3fdfbe 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c @@ -58,9 +58,8 @@ static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries, TEST_ASSERT(entry->flags == 0, ".flags field should be zero");
- TEST_ASSERT(entry->padding[0] == entry->padding[1] - == entry->padding[2] == 0, - ".index field should be zero"); + TEST_ASSERT(!entry->padding[0] && !entry->padding[1] && + !entry->padding[2], "padding should be zero");
/* * If needed for debug: