linux-hardening - Re: [PATCH] lib: overflow: Convert to Kunit

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Message-ID: <68057bea-7bf7-afb9-4c99-aa3b2c024133@linuxfoundation.org>
Date:   Thu, 17 Feb 2022 10:24:44 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Kees Cook <keescook@...omium.org>,
        Daniel Latypov <dlatypov@...gle.com>
Cc:     David Gow <davidgow@...gle.com>,
        Vitor Massaru Iha <vitor@...saru.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        KUnit Development <kunit-dev@...glegroups.com>,
        linux-kselftest@...r.kernel.org, linux-hardening@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] lib: overflow: Convert to Kunit

On 2/17/22 10:09 AM, Kees Cook wrote:
> On Wed, Feb 16, 2022 at 02:57:12PM -0800, Daniel Latypov wrote:
>> On Wed, Feb 16, 2022 at 2:42 PM Kees Cook <keescook@...omium.org> wrote:
>>>
>>> Convert overflow unit tests to KUnit, for better integration into the
>>> kernel self test framework. Includes a rename of test_overflow.c to
>>> overflow_kunit.c, and CONFIG_TEST_OVERFLOW to CONFIG_OVERFLOW_KUNIT_TEST.
>>>
>>> $ ./tools/testing/kunit/kunit.py config
>>> ...
>>> $ ./tools/testing/kunit/kunit.py run overflow
>>
>> JFYI, you can run this as a one-liner via
>>
>> $ ./tools/testing/kunit/kunit.py run --kunitconfig /dev/stdin <<EOF
>> CONFIG_KUNIT=y
>> CONFIG_TEST_OVERFLOW=y
>> EOF
>>
>> The above is taken from my own duplicate version of this patch
>> [1] https://lore.kernel.org/linux-kselftest/20210503211536.1384578-1-dlatypov@google.com/
> 
> Ah-ha! I thought I remembered this conversion being proposed before but
> I totally failed to find it. Thank you! I'll compare/adjust this patch
> and add you as Co-developed-by.
> 
>>> ...
>>> [14:33:51] Starting KUnit Kernel (1/1)...
>>> [14:33:51] ============================================================
>>> [14:33:51] ================== overflow (11 subtests) ==================
>>> [14:33:51] [PASSED] u8_overflow_test
>>> [14:33:51] [PASSED] s8_overflow_test
>>> [14:33:51] [PASSED] u16_overflow_test
>>> [14:33:51] [PASSED] s16_overflow_test
>>> [14:33:51] [PASSED] u32_overflow_test
>>> [14:33:51] [PASSED] s32_overflow_test
>>> [14:33:51] [PASSED] u64_overflow_test
>>> [14:33:51] [PASSED] s64_overflow_test
>>> [14:33:51] [PASSED] overflow_shift_test
>>> [14:33:51] [PASSED] overflow_allocation_test
>>> [14:33:51] [PASSED] overflow_size_helpers_test
>>> [14:33:51] ==================== [PASSED] overflow =====================
>>> [14:33:51] ============================================================
>>> [14:33:51] Testing complete. Passed: 11, Failed: 0, Crashed: 0, Skipped: 0, Errors: 0
>>> [14:33:51] Elapsed time: 12.525s total, 0.001s configuring, 12.402s building, 0.101s running
>>>
>>> Cc: David Gow <davidgow@...gle.com>
>>> Cc: Vitor Massaru Iha <vitor@...saru.org>
>>> Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
>>> Cc: Nick Desaulniers <ndesaulniers@...gle.com>
>>> Co-developed-by: Vitor Massaru Iha <vitor@...saru.org>
>>> Signed-off-by: Vitor Massaru Iha <vitor@...saru.org>
>>> Link: https://lore.kernel.org/lkml/20200720224418.200495-1-vitor@massaru.org/
>>> Signed-off-by: Kees Cook <keescook@...omium.org>
>>
>> Reviewed-by: Daniel Latypov <dlatypov@...gle.com>
>>

Looks good to me. I recall reviewing this when Vitor was working on this.
Glad to this happen.

Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah