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kasan: add option to disable read/write checks 

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>
This commit is contained in:
Xu Xingliang 2023-08-31 18:11:39 +08:00 committed by Xiang Xiao
parent cb105192c7
commit a2df576ecf
5 changed files with 49 additions and 0 deletions
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8
arch/arm/src/common/Toolchain.defs
View File

@ -78,6 +78,14 @@ ifeq ($(CONFIG_MM_KASAN_ALL),y)
ARCHOPTIMIZATION += -fsanitize=kernel-address
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_READS_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-reads=0
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_WRITES_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-writes=0
endif
ifeq ($(CONFIG_UNWINDER_ARM),y)
ARCHOPTIMIZATION += -funwind-tables -fasynchronous-unwind-tables
endif

8
arch/risc-v/src/common/Toolchain.defs
View File

@ -230,6 +230,14 @@ ifeq ($(CONFIG_MM_KASAN_ALL),y)
ARCHOPTIMIZATION += -fsanitize=kernel-address
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_READS_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-reads=0
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_WRITES_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-writes=0
endif
ifeq ($(CONFIG_MM_UBSAN_ALL),y)
ARCHOPTIMIZATION += $(CONFIG_MM_UBSAN_OPTION)
endif

8
arch/xtensa/src/lx6/Toolchain.defs
View File

@ -47,6 +47,14 @@ ifeq ($(CONFIG_MM_KASAN_ALL),y)
ARCHOPTIMIZATION += -fsanitize=kernel-address
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_READS_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-reads=0
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_WRITES_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-writes=0
endif
ifeq ($(CONFIG_MM_UBSAN_ALL),y)
ARCHOPTIMIZATION += $(CONFIG_MM_UBSAN_OPTION)
endif

8
arch/xtensa/src/lx7/Toolchain.defs
View File

@ -47,6 +47,14 @@ ifeq ($(CONFIG_MM_KASAN_ALL),y)
ARCHOPTIMIZATION += -fsanitize=kernel-address
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_READS_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-reads=0
endif
ifeq ($(CONFIG_MM_KASAN_DISABLE_WRITES_CHECK),y)
ARCHOPTIMIZATION += --param asan-instrument-writes=0
endif
ifeq ($(CONFIG_MM_UBSAN_ALL),y)
ARCHOPTIMIZATION += $(CONFIG_MM_UBSAN_OPTION)
endif

17
mm/Kconfig
View File

@ -265,6 +265,23 @@ config MM_KASAN_ALL
to check. Enabling this option will get image size increased
and performance decreased significantly.
config MM_KASAN_DISABLE_READS_CHECK
bool "Disable reads check"
depends on MM_KASAN
default n
---help---
This option disable kasan reads check. It speeds up performance
compared with default read/write check. Only disable it when you are
sure there's no need to do so. Or performance is too bad and only focus
on writes check.
config MM_KASAN_DISABLE_WRITES_CHECK
bool "Disable writes check"
depends on MM_KASAN
default n
---help---
This option disable kasan writes check.
config MM_UBSAN
bool "Undefined Behavior Sanitizer"
default n