mm/kasan/kasan.h

#ifndef __MM_KASAN_KASAN_H
#define __MM_KASAN_KASAN_H

#include <linux/kasan.h>

#define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
#define KASAN_SHADOW_MASK       (KASAN_SHADOW_SCALE_SIZE - 1)

#define KASAN_FREE_PAGE         0xFF  /* page was freed */

struct kasan_access_info {
	const void *access_addr;
	const void *first_bad_addr;
	size_t access_size;
	bool is_write;
	unsigned long ip;
};

void kasan_report_error(struct kasan_access_info *info);
void kasan_report_user_access(struct kasan_access_info *info);

static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
{
	return (void *)(((unsigned long)shadow_addr - KASAN_SHADOW_OFFSET)
		<< KASAN_SHADOW_SCALE_SHIFT);
}

static inline bool kasan_enabled(void)
{
	return !current->kasan_depth;
}

void kasan_report(unsigned long addr, size_t size,
		bool is_write, unsigned long ip);

#endif