mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-01 14:53:11 +01:00
Walter Wu
02c587733c
CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN stack
instrumentation, but we should only need one config, so that we remove
CONFIG_KASAN_STACK_ENABLE and make CONFIG_KASAN_STACK workable. see [1].
When enable KASAN stack instrumentation, then for gcc we could do no
prompt and default value y, and for clang prompt and default value n.
This patch fixes the following compilation warning:
include/linux/kasan.h:333:30: warning: 'CONFIG_KASAN_STACK' is not defined, evaluates to 0 [-Wundef]
[[email protected]: fix merge snafu]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=210221 [1]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: d9b571c885 ("kasan: fix KASAN_STACK dependency for HW_TAGS")
Signed-off-by: Walter Wu <[email protected]>
Suggested-by: Dmitry Vyukov <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
58 lines
1.6 KiB
Makefile
58 lines
1.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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CFLAGS_KASAN_NOSANITIZE := -fno-builtin
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KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
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cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
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ifdef CONFIG_KASAN_STACK
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stack_enable := 1
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else
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stack_enable := 0
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endif
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ifdef CONFIG_KASAN_GENERIC
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ifdef CONFIG_KASAN_INLINE
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call_threshold := 10000
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else
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call_threshold := 0
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endif
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CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
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# -fasan-shadow-offset fails without -fsanitize
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CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \
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-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
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$(call cc-option, -fsanitize=kernel-address \
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-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
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ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)
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CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
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else
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# Now add all the compiler specific options that are valid standalone
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CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \
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$(call cc-param,asan-globals=1) \
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$(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \
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$(call cc-param,asan-stack=$(stack_enable)) \
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$(call cc-param,asan-instrument-allocas=1)
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endif
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endif # CONFIG_KASAN_GENERIC
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ifdef CONFIG_KASAN_SW_TAGS
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ifdef CONFIG_KASAN_INLINE
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instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET))
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else
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instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1)
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endif
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CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
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$(call cc-param,hwasan-instrument-stack=$(stack_enable)) \
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$(call cc-param,hwasan-use-short-granules=0) \
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$(instrumentation_flags)
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endif # CONFIG_KASAN_SW_TAGS
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export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE
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