238 lines
7.1 KiB
C
238 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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_TAG_KERNEL 0xFF /* native kernel pointers tag */
|
|
#define KASAN_TAG_INVALID 0xFE /* inaccessible memory tag */
|
|
#define KASAN_TAG_MAX 0xFD /* maximum value for random tags */
|
|
|
|
#ifdef CONFIG_KASAN_GENERIC
|
|
#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) */
|
|
#else
|
|
#define KASAN_FREE_PAGE KASAN_TAG_INVALID
|
|
#define KASAN_PAGE_REDZONE KASAN_TAG_INVALID
|
|
#define KASAN_KMALLOC_REDZONE KASAN_TAG_INVALID
|
|
#define KASAN_KMALLOC_FREE KASAN_TAG_INVALID
|
|
#endif
|
|
|
|
#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
|
|
|
|
/*
|
|
* alloca redzone shadow values
|
|
*/
|
|
#define KASAN_ALLOCA_LEFT 0xCA
|
|
#define KASAN_ALLOCA_RIGHT 0xCB
|
|
|
|
#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
|
|
};
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
static inline bool addr_has_shadow(const void *addr)
|
|
{
|
|
return (addr >= kasan_shadow_to_mem((void *)KASAN_SHADOW_START));
|
|
}
|
|
|
|
void kasan_poison_shadow(const void *address, size_t size, u8 value);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
void kasan_report(unsigned long addr, size_t size,
|
|
bool is_write, unsigned long ip);
|
|
void kasan_report_invalid_free(void *object, unsigned long ip);
|
|
|
|
#if defined(CONFIG_KASAN_GENERIC) && \
|
|
(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
|
|
|
|
#ifdef CONFIG_KASAN_SW_TAGS
|
|
|
|
void print_tags(u8 addr_tag, const void *addr);
|
|
|
|
u8 random_tag(void);
|
|
|
|
#else
|
|
|
|
static inline void print_tags(u8 addr_tag, const void *addr) { }
|
|
|
|
static inline u8 random_tag(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
#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_loadN(unsigned long addr, size_t size);
|
|
void __asan_storeN(unsigned long addr, 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_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_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);
|
|
|
|
#endif
|