From: Vasily Gorbik Date: Sun, 19 Nov 2017 10:39:39 +0000 (+0100) Subject: s390/kasan: enable stack and global variables access checks X-Git-Tag: v4.20-rc1~173^2~27 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5e785963298b7923e28817d20868882fbefc863c;p=thirdparty%2Fkernel%2Flinux.git s390/kasan: enable stack and global variables access checks By defining KASAN_SHADOW_OFFSET in Kconfig stack and global variables memory access check instrumentation is enabled. gcc version 4.9.2 or newer is also required. Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 95fff775ac7c4..24586257c5cd7 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -56,6 +56,11 @@ config PCI_QUIRKS config ARCH_SUPPORTS_UPROBES def_bool y +config KASAN_SHADOW_OFFSET + hex + depends on KASAN + default 0x30000000000 + config S390 def_bool y select ARCH_BINFMT_ELF_STATE diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h index 7de6eceb562ee..892f4585c663f 100644 --- a/arch/s390/include/asm/kasan.h +++ b/arch/s390/include/asm/kasan.h @@ -9,7 +9,7 @@ #define KASAN_SHADOW_SCALE_SHIFT 3 #define KASAN_SHADOW_SIZE \ (_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT)) -#define KASAN_SHADOW_OFFSET _AC(0x30000000000, UL) +#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) #define KASAN_SHADOW_START KASAN_SHADOW_OFFSET #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)