2020-11-10 22:14:32

by Andrey Konovalov

Subject: [PATCH v9 02/44] kasan: KASAN_VMALLOC depends on KASAN_GENERIC

Currently only generic KASAN mode supports vmalloc, reflect that
in the config.

Signed-off-by: Andrey Konovalov <[email protected]>
Signed-off-by: Vincenzo Frascino <[email protected]>
Reviewed-by: Marco Elver <[email protected]>
---
Change-Id: I1889e5b3bed28cc5d607802fb6ae43ba461c0dc1
---
lib/Kconfig.kasan | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 542a9c18398e..8f0742a0f23e 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -155,7 +155,7 @@ config KASAN_SW_TAGS_IDENTIFY

config KASAN_VMALLOC
bool "Back mappings in vmalloc space with real shadow memory"
- depends on HAVE_ARCH_KASAN_VMALLOC
+ depends on KASAN_GENERIC && HAVE_ARCH_KASAN_VMALLOC
help
By default, the shadow region for vmalloc space is the read-only
zero page. This means that KASAN cannot detect errors involving
--
2.29.2.222.g5d2a92d10f8-goog

2020-11-11 13:23:49

by Alexander Potapenko

Subject: Re: [PATCH v9 02/44] kasan: KASAN_VMALLOC depends on KASAN_GENERIC

On Tue, Nov 10, 2020 at 11:11 PM Andrey Konovalov <[email protected]> wrote:
>
> Currently only generic KASAN mode supports vmalloc, reflect that
> in the config.
>
> Signed-off-by: Andrey Konovalov <[email protected]>
> Signed-off-by: Vincenzo Frascino <[email protected]>
> Reviewed-by: Marco Elver <[email protected]>
Reviewed-by: Alexander Potapenko <[email protected]>

> ---
> Change-Id: I1889e5b3bed28cc5d607802fb6ae43ba461c0dc1
> ---
> lib/Kconfig.kasan | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
> index 542a9c18398e..8f0742a0f23e 100644
> --- a/lib/Kconfig.kasan
> +++ b/lib/Kconfig.kasan
> @@ -155,7 +155,7 @@ config KASAN_SW_TAGS_IDENTIFY
>
> config KASAN_VMALLOC
> bool "Back mappings in vmalloc space with real shadow memory"
> - depends on HAVE_ARCH_KASAN_VMALLOC
> + depends on KASAN_GENERIC && HAVE_ARCH_KASAN_VMALLOC
> help
> By default, the shadow region for vmalloc space is the read-only
> zero page. This means that KASAN cannot detect errors involving
> --
> 2.29.2.222.g5d2a92d10f8-goog
>


--
Alexander Potapenko
Software Engineer

Google Germany GmbH
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