* [PATCH] kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS
@ 2021-09-10 8:42 Marco Elver
2021-10-03 17:44 ` Andrey Konovalov
0 siblings, 1 reply; 2+ messages in thread
From: Marco Elver @ 2021-09-10 8:42 UTC (permalink / raw)
To: elver, Andrew Morton
Cc: Andrey Ryabinin, Alexander Potapenko, Andrey Konovalov,
Dmitry Vyukov, kasan-dev, linux-kernel, Aleksandr Nogikh,
Taras Madan
In the main KASAN config option CC_HAS_WORKING_NOSANITIZE_ADDRESS is
checked for instrumentation-based modes. However, if
HAVE_ARCH_KASAN_HW_TAGS is true all modes may still be selected.
To fix, also make the software modes depend on
CC_HAS_WORKING_NOSANITIZE_ADDRESS.
Fixes: 6a63a63ff1ac ("kasan: introduce CONFIG_KASAN_HW_TAGS")
Signed-off-by: Marco Elver <elver@google.com>
---
lib/Kconfig.kasan | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 1e2d10f86011..cdc842d090db 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -66,6 +66,7 @@ choice
config KASAN_GENERIC
bool "Generic mode"
depends on HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC
+ depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
select SLUB_DEBUG if SLUB
select CONSTRUCTORS
help
@@ -86,6 +87,7 @@ config KASAN_GENERIC
config KASAN_SW_TAGS
bool "Software tag-based mode"
depends on HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS
+ depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
select SLUB_DEBUG if SLUB
select CONSTRUCTORS
help
--
2.33.0.309.g3052b89438-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS
2021-09-10 8:42 [PATCH] kasan: fix Kconfig check of CC_HAS_WORKING_NOSANITIZE_ADDRESS Marco Elver
@ 2021-10-03 17:44 ` Andrey Konovalov
0 siblings, 0 replies; 2+ messages in thread
From: Andrey Konovalov @ 2021-10-03 17:44 UTC (permalink / raw)
To: Marco Elver
Cc: Andrew Morton, Andrey Ryabinin, Alexander Potapenko,
Dmitry Vyukov, kasan-dev, LKML, Aleksandr Nogikh, Taras Madan
On Fri, Sep 10, 2021 at 10:42 AM Marco Elver <elver@google.com> wrote:
>
> In the main KASAN config option CC_HAS_WORKING_NOSANITIZE_ADDRESS is
> checked for instrumentation-based modes. However, if
> HAVE_ARCH_KASAN_HW_TAGS is true all modes may still be selected.
>
> To fix, also make the software modes depend on
> CC_HAS_WORKING_NOSANITIZE_ADDRESS.
>
> Fixes: 6a63a63ff1ac ("kasan: introduce CONFIG_KASAN_HW_TAGS")
> Signed-off-by: Marco Elver <elver@google.com>
> ---
> lib/Kconfig.kasan | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
> index 1e2d10f86011..cdc842d090db 100644
> --- a/lib/Kconfig.kasan
> +++ b/lib/Kconfig.kasan
> @@ -66,6 +66,7 @@ choice
> config KASAN_GENERIC
> bool "Generic mode"
> depends on HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC
> + depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
> select SLUB_DEBUG if SLUB
> select CONSTRUCTORS
> help
> @@ -86,6 +87,7 @@ config KASAN_GENERIC
> config KASAN_SW_TAGS
> bool "Software tag-based mode"
> depends on HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS
> + depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
> select SLUB_DEBUG if SLUB
> select CONSTRUCTORS
> help
> --
> 2.33.0.309.g3052b89438-goog
>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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