linux-kernel - Re: [PATCH v2 11/11] kasan: docs: update tests section

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Date:   Fri, 12 Mar 2021 16:11:01 +0100
From:   Marco Elver <elver@...gle.com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 11/11] kasan: docs: update tests section

On Fri, Mar 12, 2021 at 03:24PM +0100, Andrey Konovalov wrote:
> Update the "Tests" section in KASAN documentation:
> 
> - Add an introductory sentence.
> - Add proper indentation for the list of ways to run KUnit tests.
> - Punctuation, readability, and other minor clean-ups.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>

Reviewed-by: Marco Elver <elver@...gle.com>

> ---
> 
> Changes v1->v2:
> - Fix missing snippet delimeter around "test_kasan.ko".
> - Drop "the" before "test_kasan.ko".
> ---
>  Documentation/dev-tools/kasan.rst | 32 +++++++++++++++----------------
>  1 file changed, 15 insertions(+), 17 deletions(-)
> 
> diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
> index 5749c14b38d0..a8c3e0cff88d 100644
> --- a/Documentation/dev-tools/kasan.rst
> +++ b/Documentation/dev-tools/kasan.rst
> @@ -411,19 +411,20 @@ saving and restoring the per-page KASAN tag via
>  Tests
>  ~~~~~
>  
> -KASAN tests consist of two parts:
> +There are KASAN tests that allow verifying that KASAN works and can detect
> +certain types of memory corruptions. The tests consist of two parts:
>  
>  1. Tests that are integrated with the KUnit Test Framework. Enabled with
>  ``CONFIG_KASAN_KUNIT_TEST``. These tests can be run and partially verified
> -automatically in a few different ways, see the instructions below.
> +automatically in a few different ways; see the instructions below.
>  
>  2. Tests that are currently incompatible with KUnit. Enabled with
>  ``CONFIG_KASAN_MODULE_TEST`` and can only be run as a module. These tests can
> -only be verified manually, by loading the kernel module and inspecting the
> +only be verified manually by loading the kernel module and inspecting the
>  kernel log for KASAN reports.
>  
> -Each KUnit-compatible KASAN test prints a KASAN report if an error is detected.
> -Then the test prints its number and status.
> +Each KUnit-compatible KASAN test prints one of multiple KASAN reports if an
> +error is detected. Then the test prints its number and status.
>  
>  When a test passes::
>  
> @@ -451,27 +452,24 @@ Or, if one of the tests failed::
>  
>          not ok 1 - kasan
>  
> -
>  There are a few ways to run KUnit-compatible KASAN tests.
>  
>  1. Loadable module
>  
> -With ``CONFIG_KUNIT`` enabled, ``CONFIG_KASAN_KUNIT_TEST`` can be built as
> -a loadable module and run on any architecture that supports KASAN by loading
> -the module with insmod or modprobe. The module is called ``test_kasan``.
> +   With ``CONFIG_KUNIT`` enabled, KASAN-KUnit tests can be built as a loadable
> +   module and run by loading ``test_kasan.ko`` with ``insmod`` or ``modprobe``.
>  
>  2. Built-In
>  
> -With ``CONFIG_KUNIT`` built-in, ``CONFIG_KASAN_KUNIT_TEST`` can be built-in
> -on any architecure that supports KASAN. These and any other KUnit tests enabled
> -will run and print the results at boot as a late-init call.
> +   With ``CONFIG_KUNIT`` built-in, KASAN-KUnit tests can be built-in as well.
> +   In this case, the tests will run at boot as a late-init call.
>  
>  3. Using kunit_tool
>  
> -With ``CONFIG_KUNIT`` and ``CONFIG_KASAN_KUNIT_TEST`` built-in, it's also
> -possible use ``kunit_tool`` to see the results of these and other KUnit tests
> -in a more readable way. This will not print the KASAN reports of the tests that
> -passed. Use `KUnit documentation <https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html>`_
> -for more up-to-date information on ``kunit_tool``.
> +   With ``CONFIG_KUNIT`` and ``CONFIG_KASAN_KUNIT_TEST`` built-in, it is also
> +   possible to use ``kunit_tool`` to see the results of KUnit tests in a more
> +   readable way. This will not print the KASAN reports of the tests that passed.
> +   See `KUnit documentation <https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html>`_
> +   for more up-to-date information on ``kunit_tool``.
>  
>  .. _KUnit: https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html
> -- 
> 2.31.0.rc2.261.g7f71774620-goog
>