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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/kasan-checks.h
..
..
@@ -2,14 +2,49 @@
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 #ifndef _LINUX_KASAN_CHECKS_H
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 #define _LINUX_KASAN_CHECKS_H
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-#if defined(__SANITIZE_ADDRESS__) || defined(__KASAN_INTERNAL)
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-void kasan_check_read(const volatile void *p, unsigned int size);
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-void kasan_check_write(const volatile void *p, unsigned int size);
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+#include <linux/types.h>
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+
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+/*
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+ * The annotations present in this file are only relevant for the software
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+ * KASAN modes that rely on compiler instrumentation, and will be optimized
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+ * away for the hardware tag-based KASAN mode. Use kasan_check_byte() instead.
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+ */
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+
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+/*
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+ * __kasan_check_*: Always available when KASAN is enabled. This may be used
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+ * even in compilation units that selectively disable KASAN, but must use KASAN
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+ * to validate access to an address.   Never use these in header files!
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+ */
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+#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
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+bool __kasan_check_read(const volatile void *p, unsigned int size);
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+bool __kasan_check_write(const volatile void *p, unsigned int size);
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 #else
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-static inline void kasan_check_read(const volatile void *p, unsigned int size)
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-{ }
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-static inline void kasan_check_write(const volatile void *p, unsigned int size)
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-{ }
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+static inline bool __kasan_check_read(const volatile void *p, unsigned int size)
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+{
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+	return true;
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+}
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+static inline bool __kasan_check_write(const volatile void *p, unsigned int size)
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+{
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+	return true;
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+}
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+#endif
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+
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+/*
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+ * kasan_check_*: Only available when the particular compilation unit has KASAN
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+ * instrumentation enabled. May be used in header files.
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+ */
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+#ifdef __SANITIZE_ADDRESS__
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+#define kasan_check_read __kasan_check_read
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+#define kasan_check_write __kasan_check_write
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+#else
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+static inline bool kasan_check_read(const volatile void *p, unsigned int size)
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+{
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+	return true;
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+}
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+static inline bool kasan_check_write(const volatile void *p, unsigned int size)
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+{
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+	return true;
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+}
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 #endif
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 #endif