linux-kernel - Re: [PATCH v6 04/14] KVM: s390: selftest: memop: Add bad address test

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Date:   Thu, 26 Jan 2023 16:23:40 +0100
From:   Janosch Frank <frankja@...ux.ibm.com>
To:     Janis Schoetterl-Glausch <scgl@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>
Cc:     David Hildenbrand <david@...hat.com>,
        Jonathan Corbet <corbet@....net>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-s390@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Shuah Khan <shuah@...nel.org>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Nico Boehr <nrb@...ux.ibm.com>
Subject: Re: [PATCH v6 04/14] KVM: s390: selftest: memop: Add bad address test

On 1/25/23 22:25, Janis Schoetterl-Glausch wrote:
> Add test that tries to access, instead of CHECK_ONLY.
""
Add a test that tries a real write to a bad address.
A CHECK_ONLY test doesn't cover all paths.
""

At first I thought you were replacing a test.

> 
> Signed-off-by: Janis Schoetterl-Glausch <scgl@...ux.ibm.com>
> Reviewed-by: Nico Boehr <nrb@...ux.ibm.com>
> ---
>   tools/testing/selftests/kvm/s390x/memop.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c
> index bbc191a13760..5aae27549437 100644
> --- a/tools/testing/selftests/kvm/s390x/memop.c
> +++ b/tools/testing/selftests/kvm/s390x/memop.c
> @@ -641,7 +641,9 @@ static void _test_errors_common(struct test_info info, enum mop_target target, i
>   
>   	/* Bad guest address: */
>   	rv = ERR_MOP(info, target, WRITE, mem1, size, GADDR((void *)~0xfffUL), CHECK_ONLY);
> -	TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory access");
> +	TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory address");

"ioctl does not report bad guest memory address on CHECK_ONLY write" ?

> +	rv = ERR_MOP(info, target, WRITE, mem1, size, GADDR((void *)~0xfffUL));
> +	TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory address");

"ioctl does not report bad guest memory address on write" ?

Not really necessary in this case, it just needs to be different from 
the one on top.

>   
>   	/* Bad host address: */
>   	rv = ERR_MOP(info, target, WRITE, 0, size, GADDR_V(mem1));