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References: <20210626100931.22794-1-Kuan-Ying.Lee@mediatek.com> <20210626100931.22794-2-Kuan-Ying.Lee@mediatek.com>
In-Reply-To: <20210626100931.22794-2-Kuan-Ying.Lee@mediatek.com>
From:   Marco Elver <elver@google.com>
Date:   Mon, 28 Jun 2021 08:00:00 +0200
Message-ID: <CANpmjNO6k5=0HMf-Y3j70iTKLKY8XJAiLDDrfNf4-3cLASxHOA@mail.gmail.com>
Subject: Re: [PATCH v4 1/3] kasan: rename CONFIG_KASAN_SW_TAGS_IDENTIFY to CONFIG_KASAN_TAGS_IDENTIFY
To:     Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc:     Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Alexander Potapenko <glider@google.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com,
        chinwen.chang@mediatek.com, nicholas.tang@mediatek.com
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On Sat, 26 Jun 2021 at 12:09, Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> wrote:
>
> This patch renames CONFIG_KASAN_SW_TAGS_IDENTIFY to
> CONFIG_KASAN_TAGS_IDENTIFY in order to be compatible
> with hardware tag-based mode.
>
> Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
> Suggested-by: Marco Elver <elver@google.com>
> Reviewed-by: Alexander Potapenko <glider@google.com>
> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>

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


> ---
>  lib/Kconfig.kasan         | 2 +-
>  mm/kasan/kasan.h          | 4 ++--
>  mm/kasan/report_sw_tags.c | 2 +-
>  mm/kasan/sw_tags.c        | 4 ++--
>  4 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
> index c3b228828a80..fdb4a08dba83 100644
> --- a/lib/Kconfig.kasan
> +++ b/lib/Kconfig.kasan
> @@ -167,7 +167,7 @@ config KASAN_STACK
>           instrumentation is also disabled as it adds inline-style
>           instrumentation that is run unconditionally.
>
> -config KASAN_SW_TAGS_IDENTIFY
> +config KASAN_TAGS_IDENTIFY
>         bool "Enable memory corruption identification"
>         depends on KASAN_SW_TAGS
>         help
> diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
> index 7b45b17a8106..952df2db7fdd 100644
> --- a/mm/kasan/kasan.h
> +++ b/mm/kasan/kasan.h
> @@ -153,7 +153,7 @@ struct kasan_track {
>         depot_stack_handle_t stack;
>  };
>
> -#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
> +#ifdef CONFIG_KASAN_TAGS_IDENTIFY
>  #define KASAN_NR_FREE_STACKS 5
>  #else
>  #define KASAN_NR_FREE_STACKS 1
> @@ -170,7 +170,7 @@ struct kasan_alloc_meta {
>  #else
>         struct kasan_track free_track[KASAN_NR_FREE_STACKS];
>  #endif
> -#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
> +#ifdef CONFIG_KASAN_TAGS_IDENTIFY
>         u8 free_pointer_tag[KASAN_NR_FREE_STACKS];
>         u8 free_track_idx;
>  #endif
> diff --git a/mm/kasan/report_sw_tags.c b/mm/kasan/report_sw_tags.c
> index 3d20d3451d9e..821a14a19a92 100644
> --- a/mm/kasan/report_sw_tags.c
> +++ b/mm/kasan/report_sw_tags.c
> @@ -31,7 +31,7 @@
>
>  const char *kasan_get_bug_type(struct kasan_access_info *info)
>  {
> -#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
> +#ifdef CONFIG_KASAN_TAGS_IDENTIFY
>         struct kasan_alloc_meta *alloc_meta;
>         struct kmem_cache *cache;
>         struct page *page;
> diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c
> index 9362938abbfa..dd05e6c801fa 100644
> --- a/mm/kasan/sw_tags.c
> +++ b/mm/kasan/sw_tags.c
> @@ -177,7 +177,7 @@ void kasan_set_free_info(struct kmem_cache *cache,
>         if (!alloc_meta)
>                 return;
>
> -#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
> +#ifdef CONFIG_KASAN_TAGS_IDENTIFY
>         idx = alloc_meta->free_track_idx;
>         alloc_meta->free_pointer_tag[idx] = tag;
>         alloc_meta->free_track_idx = (idx + 1) % KASAN_NR_FREE_STACKS;
> @@ -196,7 +196,7 @@ struct kasan_track *kasan_get_free_track(struct kmem_cache *cache,
>         if (!alloc_meta)
>                 return NULL;
>
> -#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
> +#ifdef CONFIG_KASAN_TAGS_IDENTIFY
>         for (i = 0; i < KASAN_NR_FREE_STACKS; i++) {
>                 if (alloc_meta->free_pointer_tag[i] == tag)
>                         break;
> --
> 2.18.0
>
> --
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