linux-kernel - Re: [PATCH v3 1/3] kasan: rename CONFIG_KASAN_SW_TAGS_IDENTIFY to CONFIG_KASAN_TAGS

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Date:   Tue, 22 Jun 2021 16:54:14 +0300
From:   Andrey Konovalov <andreyknvl@...il.com>
To:     Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
Cc:     Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com,
        chinwen.chang@...iatek.com, nicholas.tang@...iatek.com
Subject: Re: [PATCH v3 1/3] kasan: rename CONFIG_KASAN_SW_TAGS_IDENTIFY to CONFIG_KASAN_TAGS_IDENTIFY

On Sun, Jun 20, 2021 at 2:48 PM Kuan-Ying Lee
<Kuan-Ying.Lee@...iatek.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@...iatek.com>
> Suggested-by: Marco Elver <elver@...gle.com>
> Cc: Andrey Ryabinin <ryabinin.a.a@...il.com>
> Cc: Alexander Potapenko <glider@...gle.com>
> Cc: Andrey Konovalov <andreyknvl@...il.com>
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> ---
>  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 cffc2ebbf185..6f5d48832139 100644
> --- a/lib/Kconfig.kasan
> +++ b/lib/Kconfig.kasan
> @@ -155,7 +155,7 @@ config KASAN_STACK
>           CONFIG_COMPILE_TEST.  On gcc it is assumed to always be safe
>           to use and enabled by default.
>
> -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 8f450bc28045..b0fc9a1eb7e3 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
>

Reviewed-by: Andrey Konovalov <andreyknvl@...il.com>