116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
#ifndef __MM_KASAN_KASAN_H
|
|
#define __MM_KASAN_KASAN_H
|
|
|
|
#include <linux/kasan.h>
|
|
#include <linux/stackdepot.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 */
|
|
#define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */
|
|
#define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */
|
|
#define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */
|
|
#define KASAN_GLOBAL_REDZONE 0xFA /* redzone for global variable */
|
|
|
|
/*
|
|
* Stack redzone shadow values
|
|
* (Those are compiler's ABI, don't change them)
|
|
*/
|
|
#define KASAN_STACK_LEFT 0xF1
|
|
#define KASAN_STACK_MID 0xF2
|
|
#define KASAN_STACK_RIGHT 0xF3
|
|
#define KASAN_STACK_PARTIAL 0xF4
|
|
#define KASAN_USE_AFTER_SCOPE 0xF8
|
|
|
|
/* 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
|
|
};
|
|
|
|
/**
|
|
* Structures to keep alloc and free tracks *
|
|
*/
|
|
|
|
#define KASAN_STACK_DEPTH 64
|
|
|
|
struct kasan_track {
|
|
u32 pid;
|
|
depot_stack_handle_t stack;
|
|
};
|
|
|
|
struct kasan_alloc_meta {
|
|
struct kasan_track alloc_track;
|
|
struct kasan_track free_track;
|
|
};
|
|
|
|
struct qlist_node {
|
|
struct qlist_node *next;
|
|
};
|
|
struct kasan_free_meta {
|
|
/* This field is used while the object is in the quarantine.
|
|
* Otherwise it might be used for the allocator freelist.
|
|
*/
|
|
struct qlist_node quarantine_link;
|
|
};
|
|
|
|
struct kasan_alloc_meta *get_alloc_info(struct kmem_cache *cache,
|
|
const void *object);
|
|
struct kasan_free_meta *get_free_info(struct kmem_cache *cache,
|
|
const void *object);
|
|
|
|
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);
|
|
}
|
|
|
|
void kasan_report(unsigned long addr, size_t size,
|
|
bool is_write, unsigned long ip);
|
|
void kasan_report_double_free(struct kmem_cache *cache, void *object,
|
|
s8 shadow);
|
|
|
|
#if defined(CONFIG_SLAB) || defined(CONFIG_SLUB)
|
|
void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache);
|
|
void quarantine_reduce(void);
|
|
void quarantine_remove_cache(struct kmem_cache *cache);
|
|
#else
|
|
static inline void quarantine_put(struct kasan_free_meta *info,
|
|
struct kmem_cache *cache) { }
|
|
static inline void quarantine_reduce(void) { }
|
|
static inline void quarantine_remove_cache(struct kmem_cache *cache) { }
|
|
#endif
|
|
|
|
#endif
|