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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __MM_KASAN_KASAN_H
#define __MM_KASAN_KASAN_H
#include <linux/kasan.h>
#include <linux/linkage.h>
#define KASAN_SHADOW_SCALE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT)
#define KASAN_SHADOW_MASK (KASAN_SHADOW_SCALE_SIZE - 1)
#define KASAN_ALLOCA_REDZONE_SIZE 32
/*
* Stack frame marker (compiler ABI).
*/
#define KASAN_CURRENT_STACK_FRAME_MAGIC 0x41B58AB3
/* Don't break randconfig/all*config builds */
#ifndef KASAN_ABI_VERSION
#define KASAN_ABI_VERSION 1
#endif
struct kasan_access_info {
const void *access_addr;
const void *first_bad_addr;
size_t access_size;
bool is_write;
unsigned long ip;
};
/* The layout of struct dictated by compiler */
struct kasan_source_location {
const char *filename;
int line_no;
int column_no;
};
/* The layout of struct dictated by compiler */
struct kasan_global {
const void *beg; /* Address of the beginning of the global variable. */
size_t size; /* Size of the global variable. */
size_t size_with_redzone; /* Size of the variable + size of the red zone. 32 bytes aligned */
const void *name;
const void *module_name; /* Name of the module where the global variable is declared. */
unsigned long has_dynamic_init; /* This needed for C++ */
#if KASAN_ABI_VERSION >= 4
struct kasan_source_location *location;
#endif
#if KASAN_ABI_VERSION >= 5
char *odr_indicator;
#endif
};
static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
{
unsigned long sa = (unsigned long)shadow_addr;
sa -= kasan_shadow_base;
sa <<= KASAN_SHADOW_SCALE_SHIFT;
sa += kasan_shadow_start;
return (void *)sa;
}
static inline bool addr_has_shadow(const void *addr)
{
return (addr >= (void *)kasan_shadow_start);
}
/**
* check_memory_region - Check memory region, and report if invalid access.
* @addr: the accessed address
* @size: the accessed size
* @write: true if access is a write access
* @ret_ip: return address
* @return: true if access was valid, false if invalid
*/
bool check_memory_region(unsigned long addr, size_t size, bool write,
unsigned long ret_ip);
void *find_first_bad_addr(void *addr, size_t size);
const char *get_bug_type(struct kasan_access_info *info);
bool kasan_report(unsigned long addr, size_t size,
bool is_write, unsigned long ip);
void kasan_report_invalid_free(void *object, unsigned long ip);
#ifndef arch_kasan_set_tag
static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
{
return addr;
}
#endif
#ifndef arch_kasan_reset_tag
#define arch_kasan_reset_tag(addr) ((void *)(addr))
#endif
#ifndef arch_kasan_get_tag
#define arch_kasan_get_tag(addr) 0
#endif
#define set_tag(addr, tag) ((void *)arch_kasan_set_tag((addr), (tag)))
#define reset_tag(addr) ((void *)arch_kasan_reset_tag(addr))
#define get_tag(addr) arch_kasan_get_tag(addr)
/*
* Exported functions for interfaces called from assembly or from generated
* code. Declarations here to avoid warning about missing declarations.
*/
asmlinkage void kasan_unpoison_task_stack_below(const void *watermark);
void __asan_register_globals(struct kasan_global *globals, size_t size);
void __asan_unregister_globals(struct kasan_global *globals, size_t size);
void __asan_handle_no_return(void);
void __asan_alloca_poison(unsigned long addr, size_t size);
void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom);
void __asan_load1(unsigned long addr);
void __asan_store1(unsigned long addr);
void __asan_load2(unsigned long addr);
void __asan_store2(unsigned long addr);
void __asan_load4(unsigned long addr);
void __asan_store4(unsigned long addr);
void __asan_load8(unsigned long addr);
void __asan_store8(unsigned long addr);
void __asan_load16(unsigned long addr);
void __asan_store16(unsigned long addr);
void __asan_loadN(unsigned long addr, size_t size);
void __asan_storeN(unsigned long addr, size_t size);
void __asan_load1_noabort(unsigned long addr);
void __asan_store1_noabort(unsigned long addr);
void __asan_load2_noabort(unsigned long addr);
void __asan_store2_noabort(unsigned long addr);
void __asan_load4_noabort(unsigned long addr);
void __asan_store4_noabort(unsigned long addr);
void __asan_load8_noabort(unsigned long addr);
void __asan_store8_noabort(unsigned long addr);
void __asan_load16_noabort(unsigned long addr);
void __asan_store16_noabort(unsigned long addr);
void __asan_loadN_noabort(unsigned long addr, size_t size);
void __asan_storeN_noabort(unsigned long addr, size_t size);
void __asan_report_load1_noabort(unsigned long addr);
void __asan_report_store1_noabort(unsigned long addr);
void __asan_report_load2_noabort(unsigned long addr);
void __asan_report_store2_noabort(unsigned long addr);
void __asan_report_load4_noabort(unsigned long addr);
void __asan_report_store4_noabort(unsigned long addr);
void __asan_report_load8_noabort(unsigned long addr);
void __asan_report_store8_noabort(unsigned long addr);
void __asan_report_load16_noabort(unsigned long addr);
void __asan_report_store16_noabort(unsigned long addr);
void __asan_report_load_n_noabort(unsigned long addr, size_t size);
void __asan_report_store_n_noabort(unsigned long addr, size_t size);
void __asan_set_shadow_00(const void *addr, size_t size);
void __asan_set_shadow_f1(const void *addr, size_t size);
void __asan_set_shadow_f2(const void *addr, size_t size);
void __asan_set_shadow_f3(const void *addr, size_t size);
void __asan_set_shadow_f5(const void *addr, size_t size);
void __asan_set_shadow_f8(const void *addr, size_t size);
extern int kasan_depth;
#endif
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