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Commit 5e785963 authored by Vasily Gorbik's avatar Vasily Gorbik Committed by Martin Schwidefsky
Browse files

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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent f4f0d32b

arch/s390/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/include/asm/kasan.h

+1 −1
Original line number Diff line number Diff line
@@ -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)