diff mbox series

[v2,19/37] kasan: don't allow SW_TAGS with ARM64_MTE

Message ID 42f25c11d97aa8497ee3851ee3531b379d6a922e.1600204505.git.andreyknvl@google.com (mailing list archive)
State New, archived
Headers show
Series kasan: add hardware tag-based mode for arm64 | expand

Commit Message

Andrey Konovalov Sept. 15, 2020, 9:16 p.m. UTC 
Software tag-based KASAN provides its own tag checking machinery that
can conflict with MTE. Don't allow enabling software tag-based KASAN
when MTE is enabled.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
Change-Id: Icd29bd0c6b1d3d7a0ee3d50c20490f404d34fc97
---
 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Catalin Marinas Sept. 17, 2020, 5:05 p.m. UTC | #1 
On Tue, Sep 15, 2020 at 11:16:01PM +0200, Andrey Konovalov wrote:
> Software tag-based KASAN provides its own tag checking machinery that
> can conflict with MTE. Don't allow enabling software tag-based KASAN
> when MTE is enabled.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
diff mbox series

Patch

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e7450fbd0aa7..e875db8e1c86 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -131,7 +131,7 @@  config ARM64
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 	select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
-	select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
+	select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE)
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_MMAP_RND_BITS
 	select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT