From 5e785963298b7923e28817d20868882fbefc863c Mon Sep 17 00:00:00 2001 From: Vasily Gorbik <gor@linux.ibm.com> Date: Sun, 19 Nov 2017 11:39:39 +0100 Subject: [PATCH] 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 <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> --- arch/s390/Kconfig | 5 +++++ arch/s390/include/asm/kasan.h | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) 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) -- GitLab