diff options
| -rw-r--r-- | include/linux/kasan-checks.h | 25 | ||||
| -rw-r--r-- | mm/kasan/common.c | 10 |
2 files changed, 26 insertions, 9 deletions
diff --git a/include/linux/kasan-checks.h b/include/linux/kasan-checks.h index a61dc075e2ce..221f05fbddd7 100644 --- a/include/linux/kasan-checks.h +++ b/include/linux/kasan-checks.h @@ -2,9 +2,28 @@ #ifndef _LINUX_KASAN_CHECKS_H #define _LINUX_KASAN_CHECKS_H -#if defined(__SANITIZE_ADDRESS__) || defined(__KASAN_INTERNAL) -void kasan_check_read(const volatile void *p, unsigned int size); -void kasan_check_write(const volatile void *p, unsigned int size); +/* + * __kasan_check_*: Always available when KASAN is enabled. This may be used + * even in compilation units that selectively disable KASAN, but must use KASAN + * to validate access to an address. Never use these in header files! + */ +#ifdef CONFIG_KASAN +void __kasan_check_read(const volatile void *p, unsigned int size); +void __kasan_check_write(const volatile void *p, unsigned int size); +#else +static inline void __kasan_check_read(const volatile void *p, unsigned int size) +{ } +static inline void __kasan_check_write(const volatile void *p, unsigned int size) +{ } +#endif + +/* + * kasan_check_*: Only available when the particular compilation unit has KASAN + * instrumentation enabled. May be used in header files. + */ +#ifdef __SANITIZE_ADDRESS__ +#define kasan_check_read __kasan_check_read +#define kasan_check_write __kasan_check_write #else static inline void kasan_check_read(const volatile void *p, unsigned int size) { } diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 242fdc01aaa9..6bada42cc152 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -14,8 +14,6 @@ * */ -#define __KASAN_INTERNAL - #include <linux/export.h> #include <linux/interrupt.h> #include <linux/init.h> @@ -89,17 +87,17 @@ void kasan_disable_current(void) current->kasan_depth--; } -void kasan_check_read(const volatile void *p, unsigned int size) +void __kasan_check_read(const volatile void *p, unsigned int size) { check_memory_region((unsigned long)p, size, false, _RET_IP_); } -EXPORT_SYMBOL(kasan_check_read); +EXPORT_SYMBOL(__kasan_check_read); -void kasan_check_write(const volatile void *p, unsigned int size) +void __kasan_check_write(const volatile void *p, unsigned int size) { check_memory_region((unsigned long)p, size, true, _RET_IP_); } -EXPORT_SYMBOL(kasan_check_write); +EXPORT_SYMBOL(__kasan_check_write); #undef memset void *memset(void *addr, int c, size_t len) |