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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Mon, 25 May 2020 11:56:53 +0200
Message-ID: <CACT4Y+agmL5ZOWmNBJyLSTuhy7ekp4HTafABUsqqP+XFd7ErKw@mail.gmail.com>
Subject: Re: [PATCH v6 4/4] kasan: update documentation for generic kasan
To:     Walter Wu <walter-zh.wu@mediatek.com>
Cc:     Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Alexander Potapenko <glider@google.com>,
        Jonathan Corbet <corbet@lwn.net>,
        kasan-dev <kasan-dev@googlegroups.com>,
        Linux-MM <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        wsd_upstream <wsd_upstream@mediatek.com>,
        linux-mediatek@lists.infradead.org
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On Fri, May 22, 2020 at 4:02 AM Walter Wu <walter-zh.wu@mediatek.com> wrote:
>
> Generic KASAN will support to record the last two call_rcu() call stacks
> and print them in KASAN report. So that need to update documentation.

Reviewed-and-tested-by: Dmitry Vyukov <dvyukov@google.com>

> Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> Cc: Alexander Potapenko <glider@google.com>
> Cc: Jonathan Corbet <corbet@lwn.net>
> ---
>  Documentation/dev-tools/kasan.rst | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
> index c652d740735d..fede42e6536b 100644
> --- a/Documentation/dev-tools/kasan.rst
> +++ b/Documentation/dev-tools/kasan.rst
> @@ -193,6 +193,9 @@ function calls GCC directly inserts the code to check the shadow memory.
>  This option significantly enlarges kernel but it gives x1.1-x2 performance
>  boost over outline instrumented kernel.
>
> +Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one
> +and the second to last.
> +
>  Software tag-based KASAN
>  ~~~~~~~~~~~~~~~~~~~~~~~~
>
> --
> 2.18.0
>
> --
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