| Message ID | 20210107062152.2015-1-walter-zh.wu@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kasan: remove redundant config option | expand |
On Thu, Jan 07, 2021 at 02:21:52PM +0800, Walter Wu wrote: > CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN > stack instrumentation, but we should only need one config option, > so that we remove CONFIG_KASAN_STACK_ENABLE. see [1]. > > For gcc we could do no prompt and default value y, and for clang > prompt and default value n. > > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=210221 > > Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> > Suggested-by: Dmitry Vyukov <dvyukov@google.com> > Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> > Cc: Dmitry Vyukov <dvyukov@google.com> > Cc: Andrey Konovalov <andreyknvl@google.com> > Cc: Alexander Potapenko <glider@google.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > --- > arch/arm64/kernel/sleep.S | 2 +- > arch/x86/kernel/acpi/wakeup_64.S | 2 +- > include/linux/kasan.h | 2 +- > lib/Kconfig.kasan | 11 ++++------- > mm/kasan/common.c | 2 +- > mm/kasan/kasan.h | 2 +- > mm/kasan/report_generic.c | 2 +- > scripts/Makefile.kasan | 10 ++++++++-- > 8 files changed, 18 insertions(+), 15 deletions(-) > > diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S > index 6bdef7362c0e..7c44ede122a9 100644 > --- a/arch/arm64/kernel/sleep.S > +++ b/arch/arm64/kernel/sleep.S > @@ -133,7 +133,7 @@ SYM_FUNC_START(_cpu_resume) > */ > bl cpu_do_resume > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > mov x0, sp > bl kasan_unpoison_task_stack_below > #endif > diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S > index 5d3a0b8fd379..c7f412f4e07d 100644 > --- a/arch/x86/kernel/acpi/wakeup_64.S > +++ b/arch/x86/kernel/acpi/wakeup_64.S > @@ -112,7 +112,7 @@ SYM_FUNC_START(do_suspend_lowlevel) > movq pt_regs_r14(%rax), %r14 > movq pt_regs_r15(%rax), %r15 > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > /* > * The suspend path may have poisoned some areas deeper in the stack, > * which we now need to unpoison. > diff --git a/include/linux/kasan.h b/include/linux/kasan.h > index 5e0655fb2a6f..35d1e9b2cbfa 100644 > --- a/include/linux/kasan.h > +++ b/include/linux/kasan.h > @@ -302,7 +302,7 @@ static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} > > #endif /* CONFIG_KASAN */ > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > void kasan_unpoison_task_stack(struct task_struct *task); > #else > static inline void kasan_unpoison_task_stack(struct task_struct *task) {} > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index f5fa4ba126bf..59de74293454 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -138,9 +138,11 @@ config KASAN_INLINE > > endchoice > > -config KASAN_STACK_ENABLE > - bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST You are effectively undoing commits 6baec880d7a5 ("kasan: turn off asan-stack for clang-8 and earlier") and ebb6d35a74ce ("kasan: remove clang version check for KASAN_STACK") with this change. This change should still remain around so that all{mod,yes}config remain mostly clean for clang builds. This should not change anything from the user's perspective because this option was never user selectable for GCC and the default y keeps it on. > +config KASAN_STACK > + bool "Enable stack instrumentation (unsafe)" > depends on KASAN_GENERIC || KASAN_SW_TAGS > + default y if CC_IS_GCC > + default n if CC_IS_CLANG This is implied and can be removed. > help > The LLVM stack address sanitizer has a know problem that > causes excessive stack usage in a lot of functions, see > @@ -154,11 +156,6 @@ config KASAN_STACK_ENABLE > CONFIG_COMPILE_TEST. On gcc it is assumed to always be safe > to use and enabled by default. > > -config KASAN_STACK > - int > - default 1 if KASAN_STACK_ENABLE || CC_IS_GCC > - default 0 > - > config KASAN_SW_TAGS_IDENTIFY > bool "Enable memory corruption identification" > depends on KASAN_SW_TAGS > diff --git a/mm/kasan/common.c b/mm/kasan/common.c > index 38ba2aecd8f4..02ec7f81dc16 100644 > --- a/mm/kasan/common.c > +++ b/mm/kasan/common.c > @@ -63,7 +63,7 @@ void __kasan_unpoison_range(const void *address, size_t size) > unpoison_range(address, size); > } > > -#if CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN_STACK) Isn't '#ifdef CONFIG_...' preferred for CONFIG symbols? > /* Unpoison the entire stack for a task. */ > void kasan_unpoison_task_stack(struct task_struct *task) > { > diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h > index cc4d9e1d49b1..bdfdb1cff653 100644 > --- a/mm/kasan/kasan.h > +++ b/mm/kasan/kasan.h > @@ -224,7 +224,7 @@ void *find_first_bad_addr(void *addr, size_t size); > const char *get_bug_type(struct kasan_access_info *info); > void metadata_fetch_row(char *buffer, void *row); > > -#if defined(CONFIG_KASAN_GENERIC) && CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN_GENERIC) && defined(CONFIG_KASAN_STACK) > void print_address_stack_frame(const void *addr); > #else > static inline void print_address_stack_frame(const void *addr) { } > diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c > index 8a9c889872da..137a1dba1978 100644 > --- a/mm/kasan/report_generic.c > +++ b/mm/kasan/report_generic.c > @@ -128,7 +128,7 @@ void metadata_fetch_row(char *buffer, void *row) > memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW); > } > > -#if CONFIG_KASAN_STACK > +#if defined(CONFIG_KASAN_STACK) > static bool __must_check tokenize_frame_descr(const char **frame_descr, > char *token, size_t max_tok_len, > unsigned long *value) > diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan > index 1e000cc2e7b4..abf231d209b1 100644 > --- a/scripts/Makefile.kasan > +++ b/scripts/Makefile.kasan > @@ -2,6 +2,12 @@ > CFLAGS_KASAN_NOSANITIZE := -fno-builtin > KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) > > +ifdef CONFIG_KASAN_STACK > + stack_enable := 1 > +else > + stack_enable := 0 > +endif > + > ifdef CONFIG_KASAN_GENERIC > > ifdef CONFIG_KASAN_INLINE > @@ -27,7 +33,7 @@ else > CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ > $(call cc-param,asan-globals=1) \ > $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ > - $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ > + $(call cc-param,asan-stack=$(stack_enable)) \ > $(call cc-param,asan-instrument-allocas=1) > endif > > @@ -42,7 +48,7 @@ else > endif > > CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ > - -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ > + -mllvm -hwasan-instrument-stack=$(stack_enable) \ > -mllvm -hwasan-use-short-granules=0 \ > $(instrumentation_flags) > > -- > 2.18.0 >
On Thu, 2021-01-07 at 14:00 -0700, Nathan Chancellor wrote: > On Thu, Jan 07, 2021 at 02:21:52PM +0800, Walter Wu wrote: > > CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN > > stack instrumentation, but we should only need one config option, > > so that we remove CONFIG_KASAN_STACK_ENABLE. see [1]. > > > > For gcc we could do no prompt and default value y, and for clang > > prompt and default value n. > > > > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=210221 > > > > Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> > > Suggested-by: Dmitry Vyukov <dvyukov@google.com> > > Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> > > Cc: Dmitry Vyukov <dvyukov@google.com> > > Cc: Andrey Konovalov <andreyknvl@google.com> > > Cc: Alexander Potapenko <glider@google.com> > > Cc: Andrew Morton <akpm@linux-foundation.org> > > --- > > arch/arm64/kernel/sleep.S | 2 +- > > arch/x86/kernel/acpi/wakeup_64.S | 2 +- > > include/linux/kasan.h | 2 +- > > lib/Kconfig.kasan | 11 ++++------- > > mm/kasan/common.c | 2 +- > > mm/kasan/kasan.h | 2 +- > > mm/kasan/report_generic.c | 2 +- > > scripts/Makefile.kasan | 10 ++++++++-- > > 8 files changed, 18 insertions(+), 15 deletions(-) > > > > diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S > > index 6bdef7362c0e..7c44ede122a9 100644 > > --- a/arch/arm64/kernel/sleep.S > > +++ b/arch/arm64/kernel/sleep.S > > @@ -133,7 +133,7 @@ SYM_FUNC_START(_cpu_resume) > > */ > > bl cpu_do_resume > > > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > > mov x0, sp > > bl kasan_unpoison_task_stack_below > > #endif > > diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S > > index 5d3a0b8fd379..c7f412f4e07d 100644 > > --- a/arch/x86/kernel/acpi/wakeup_64.S > > +++ b/arch/x86/kernel/acpi/wakeup_64.S > > @@ -112,7 +112,7 @@ SYM_FUNC_START(do_suspend_lowlevel) > > movq pt_regs_r14(%rax), %r14 > > movq pt_regs_r15(%rax), %r15 > > > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > > /* > > * The suspend path may have poisoned some areas deeper in the stack, > > * which we now need to unpoison. > > diff --git a/include/linux/kasan.h b/include/linux/kasan.h > > index 5e0655fb2a6f..35d1e9b2cbfa 100644 > > --- a/include/linux/kasan.h > > +++ b/include/linux/kasan.h > > @@ -302,7 +302,7 @@ static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} > > > > #endif /* CONFIG_KASAN */ > > > > -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) > > void kasan_unpoison_task_stack(struct task_struct *task); > > #else > > static inline void kasan_unpoison_task_stack(struct task_struct *task) {} > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > > index f5fa4ba126bf..59de74293454 100644 > > --- a/lib/Kconfig.kasan > > +++ b/lib/Kconfig.kasan > > @@ -138,9 +138,11 @@ config KASAN_INLINE > > > > endchoice > > > > -config KASAN_STACK_ENABLE > > - bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST > > You are effectively undoing commits 6baec880d7a5 ("kasan: turn off > asan-stack for clang-8 and earlier") and ebb6d35a74ce ("kasan: remove > clang version check for KASAN_STACK") with this change. This change > should still remain around so that all{mod,yes}config remain mostly > clean for clang builds. This should not change anything from the user's > perspective because this option was never user selectable for GCC and > the default y keeps it on. > Ok, I will remain this. > > +config KASAN_STACK > > + bool "Enable stack instrumentation (unsafe)" > > depends on KASAN_GENERIC || KASAN_SW_TAGS > > + default y if CC_IS_GCC > > + default n if CC_IS_CLANG > > This is implied and can be removed. > > > help > > The LLVM stack address sanitizer has a know problem that > > causes excessive stack usage in a lot of functions, see > > @@ -154,11 +156,6 @@ config KASAN_STACK_ENABLE > > CONFIG_COMPILE_TEST. On gcc it is assumed to always be safe > > to use and enabled by default. > > > > -config KASAN_STACK > > - int > > - default 1 if KASAN_STACK_ENABLE || CC_IS_GCC > > - default 0 > > - > > config KASAN_SW_TAGS_IDENTIFY > > bool "Enable memory corruption identification" > > depends on KASAN_SW_TAGS > > diff --git a/mm/kasan/common.c b/mm/kasan/common.c > > index 38ba2aecd8f4..02ec7f81dc16 100644 > > --- a/mm/kasan/common.c > > +++ b/mm/kasan/common.c > > @@ -63,7 +63,7 @@ void __kasan_unpoison_range(const void *address, size_t size) > > unpoison_range(address, size); > > } > > > > -#if CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN_STACK) > > Isn't '#ifdef CONFIG_...' preferred for CONFIG symbols? > Yes, I will fix in the next version. Thanks for your review. > > /* Unpoison the entire stack for a task. */ > > void kasan_unpoison_task_stack(struct task_struct *task) > > { > > diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h > > index cc4d9e1d49b1..bdfdb1cff653 100644 > > --- a/mm/kasan/kasan.h > > +++ b/mm/kasan/kasan.h > > @@ -224,7 +224,7 @@ void *find_first_bad_addr(void *addr, size_t size); > > const char *get_bug_type(struct kasan_access_info *info); > > void metadata_fetch_row(char *buffer, void *row); > > > > -#if defined(CONFIG_KASAN_GENERIC) && CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN_GENERIC) && defined(CONFIG_KASAN_STACK) > > void print_address_stack_frame(const void *addr); > > #else > > static inline void print_address_stack_frame(const void *addr) { } > > diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c > > index 8a9c889872da..137a1dba1978 100644 > > --- a/mm/kasan/report_generic.c > > +++ b/mm/kasan/report_generic.c > > @@ -128,7 +128,7 @@ void metadata_fetch_row(char *buffer, void *row) > > memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW); > > } > > > > -#if CONFIG_KASAN_STACK > > +#if defined(CONFIG_KASAN_STACK) > > static bool __must_check tokenize_frame_descr(const char **frame_descr, > > char *token, size_t max_tok_len, > > unsigned long *value) > > diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan > > index 1e000cc2e7b4..abf231d209b1 100644 > > --- a/scripts/Makefile.kasan > > +++ b/scripts/Makefile.kasan > > @@ -2,6 +2,12 @@ > > CFLAGS_KASAN_NOSANITIZE := -fno-builtin > > KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) > > > > +ifdef CONFIG_KASAN_STACK > > + stack_enable := 1 > > +else > > + stack_enable := 0 > > +endif > > + > > ifdef CONFIG_KASAN_GENERIC > > > > ifdef CONFIG_KASAN_INLINE > > @@ -27,7 +33,7 @@ else > > CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ > > $(call cc-param,asan-globals=1) \ > > $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ > > - $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ > > + $(call cc-param,asan-stack=$(stack_enable)) \ > > $(call cc-param,asan-instrument-allocas=1) > > endif > > > > @@ -42,7 +48,7 @@ else > > endif > > > > CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ > > - -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ > > + -mllvm -hwasan-instrument-stack=$(stack_enable) \ > > -mllvm -hwasan-use-short-granules=0 \ > > $(instrumentation_flags) > > > > -- > > 2.18.0 > > >
diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index 6bdef7362c0e..7c44ede122a9 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -133,7 +133,7 @@ SYM_FUNC_START(_cpu_resume) */ bl cpu_do_resume -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) mov x0, sp bl kasan_unpoison_task_stack_below #endif diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S index 5d3a0b8fd379..c7f412f4e07d 100644 --- a/arch/x86/kernel/acpi/wakeup_64.S +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -112,7 +112,7 @@ SYM_FUNC_START(do_suspend_lowlevel) movq pt_regs_r14(%rax), %r14 movq pt_regs_r15(%rax), %r15 -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) /* * The suspend path may have poisoned some areas deeper in the stack, * which we now need to unpoison. diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 5e0655fb2a6f..35d1e9b2cbfa 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -302,7 +302,7 @@ static inline void kasan_kfree_large(void *ptr, unsigned long ip) {} #endif /* CONFIG_KASAN */ -#if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) void kasan_unpoison_task_stack(struct task_struct *task); #else static inline void kasan_unpoison_task_stack(struct task_struct *task) {} diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index f5fa4ba126bf..59de74293454 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -138,9 +138,11 @@ config KASAN_INLINE endchoice -config KASAN_STACK_ENABLE - bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST +config KASAN_STACK + bool "Enable stack instrumentation (unsafe)" depends on KASAN_GENERIC || KASAN_SW_TAGS + default y if CC_IS_GCC + default n if CC_IS_CLANG help The LLVM stack address sanitizer has a know problem that causes excessive stack usage in a lot of functions, see @@ -154,11 +156,6 @@ config KASAN_STACK_ENABLE CONFIG_COMPILE_TEST. On gcc it is assumed to always be safe to use and enabled by default. -config KASAN_STACK - int - default 1 if KASAN_STACK_ENABLE || CC_IS_GCC - default 0 - config KASAN_SW_TAGS_IDENTIFY bool "Enable memory corruption identification" depends on KASAN_SW_TAGS diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 38ba2aecd8f4..02ec7f81dc16 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -63,7 +63,7 @@ void __kasan_unpoison_range(const void *address, size_t size) unpoison_range(address, size); } -#if CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_STACK) /* Unpoison the entire stack for a task. */ void kasan_unpoison_task_stack(struct task_struct *task) { diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index cc4d9e1d49b1..bdfdb1cff653 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -224,7 +224,7 @@ void *find_first_bad_addr(void *addr, size_t size); const char *get_bug_type(struct kasan_access_info *info); void metadata_fetch_row(char *buffer, void *row); -#if defined(CONFIG_KASAN_GENERIC) && CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_GENERIC) && defined(CONFIG_KASAN_STACK) void print_address_stack_frame(const void *addr); #else static inline void print_address_stack_frame(const void *addr) { } diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index 8a9c889872da..137a1dba1978 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -128,7 +128,7 @@ void metadata_fetch_row(char *buffer, void *row) memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW); } -#if CONFIG_KASAN_STACK +#if defined(CONFIG_KASAN_STACK) static bool __must_check tokenize_frame_descr(const char **frame_descr, char *token, size_t max_tok_len, unsigned long *value) diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 1e000cc2e7b4..abf231d209b1 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -2,6 +2,12 @@ CFLAGS_KASAN_NOSANITIZE := -fno-builtin KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) +ifdef CONFIG_KASAN_STACK + stack_enable := 1 +else + stack_enable := 0 +endif + ifdef CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_INLINE @@ -27,7 +33,7 @@ else CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ $(call cc-param,asan-globals=1) \ $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ - $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ + $(call cc-param,asan-stack=$(stack_enable)) \ $(call cc-param,asan-instrument-allocas=1) endif @@ -42,7 +48,7 @@ else endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ - -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ + -mllvm -hwasan-instrument-stack=$(stack_enable) \ -mllvm -hwasan-use-short-granules=0 \ $(instrumentation_flags)
CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN stack instrumentation, but we should only need one config option, so that we remove CONFIG_KASAN_STACK_ENABLE. see [1]. For gcc we could do no prompt and default value y, and for clang prompt and default value n. [1]: https://bugzilla.kernel.org/show_bug.cgi?id=210221 Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> Suggested-by: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> --- arch/arm64/kernel/sleep.S | 2 +- arch/x86/kernel/acpi/wakeup_64.S | 2 +- include/linux/kasan.h | 2 +- lib/Kconfig.kasan | 11 ++++------- mm/kasan/common.c | 2 +- mm/kasan/kasan.h | 2 +- mm/kasan/report_generic.c | 2 +- scripts/Makefile.kasan | 10 ++++++++-- 8 files changed, 18 insertions(+), 15 deletions(-)