[PATCH 2/2] [v3] kasan: use internal prototypes matching gcc-13 builtins
Arnd Bergmann
arnd at kernel.org
Tue May 9 07:57:21 PDT 2023
From: Arnd Bergmann <arnd at arndb.de>
gcc-13 warns about function definitions for builtin interfaces
that have a different prototype, e.g.:
In file included from kasan_test.c:31:
kasan.h:574:6: error: conflicting types for built-in function '__asan_register_globals'; expected 'void(void *, long int)' [-Werror=builtin-declaration-mismatch]
574 | void __asan_register_globals(struct kasan_global *globals, size_t size);
kasan.h:577:6: error: conflicting types for built-in function '__asan_alloca_poison'; expected 'void(void *, long int)' [-Werror=builtin-declaration-mismatch]
577 | void __asan_alloca_poison(unsigned long addr, size_t size);
kasan.h:580:6: error: conflicting types for built-in function '__asan_load1'; expected 'void(void *)' [-Werror=builtin-declaration-mismatch]
580 | void __asan_load1(unsigned long addr);
kasan.h:581:6: error: conflicting types for built-in function '__asan_store1'; expected 'void(void *)' [-Werror=builtin-declaration-mismatch]
581 | void __asan_store1(unsigned long addr);
kasan.h:643:6: error: conflicting types for built-in function '__hwasan_tag_memory'; expected 'void(void *, unsigned char, long int)' [-Werror=builtin-declaration-mismatch]
643 | void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size);
The two problems are:
- Addresses are passes as 'unsigned long' in the kernel, but gcc-13
expects a 'void *'.
- sizes meant to use a signed ssize_t rather than size_t.
Change all the prototypes to match these. Using 'void *' consistently
for addresses gets rid of a couple of type casts, so push that down to
the leaf functions where possible.
This now passes all randconfig builds on arm, arm64 and x86, but I have
not tested it on the other architectures that support kasan, since they
tend to fail randconfig builds in other ways. This might fail if any
of the 32-bit architectures expect a 'long' instead of 'int' for the
size argument.
The __asan_allocas_unpoison() function prototype is somewhat weird,
since it uses a pointer for 'stack_top' and an size_t for 'stack_bottom'.
This looks like it is meant to be 'addr' and 'size' like the others,
but the implementation clearly treats them as 'top' and 'bottom'.
Signed-off-by: Arnd Bergmann <arnd at arndb.de>
---
v3: rebase to make it apply cleanly
v2: Remove custom size type that turned out to be unnecessary after all
---
arch/arm64/kernel/traps.c | 2 +-
arch/arm64/mm/fault.c | 2 +-
include/linux/kasan.h | 2 +-
mm/kasan/common.c | 2 +-
mm/kasan/generic.c | 72 ++++++++---------
mm/kasan/kasan.h | 160 +++++++++++++++++++-------------------
mm/kasan/report.c | 17 ++--
mm/kasan/report_generic.c | 12 +--
mm/kasan/report_hw_tags.c | 2 +-
mm/kasan/report_sw_tags.c | 2 +-
mm/kasan/shadow.c | 36 ++++-----
mm/kasan/sw_tags.c | 20 ++---
12 files changed, 164 insertions(+), 165 deletions(-)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 35a95b78b14f..3f5a21e5968e 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -1044,7 +1044,7 @@ static int kasan_handler(struct pt_regs *regs, unsigned long esr)
bool recover = esr & KASAN_ESR_RECOVER;
bool write = esr & KASAN_ESR_WRITE;
size_t size = KASAN_ESR_SIZE(esr);
- u64 addr = regs->regs[0];
+ void *addr = (void *)regs->regs[0];
u64 pc = regs->pc;
kasan_report(addr, size, write, pc);
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index f4418382be98..940391ec5e1e 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -317,7 +317,7 @@ static void report_tag_fault(unsigned long addr, unsigned long esr,
* find out access size.
*/
bool is_write = !!(esr & ESR_ELx_WNR);
- kasan_report(addr, 0, is_write, regs->pc);
+ kasan_report((void *)addr, 0, is_write, regs->pc);
}
#else
/* Tag faults aren't enabled without CONFIG_KASAN_HW_TAGS. */
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index f7ef70661ce2..819b6bc8ac08 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -343,7 +343,7 @@ static inline void *kasan_reset_tag(const void *addr)
* @is_write: whether the bad access is a write or a read
* @ip: instruction pointer for the accessibility check or the bad access itself
*/
-bool kasan_report(unsigned long addr, size_t size,
+bool kasan_report(const void *addr, size_t size,
bool is_write, unsigned long ip);
#else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index b376a5d055e5..256930da578a 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -445,7 +445,7 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag
bool __kasan_check_byte(const void *address, unsigned long ip)
{
if (!kasan_byte_accessible(address)) {
- kasan_report((unsigned long)address, 1, false, ip);
+ kasan_report(address, 1, false, ip);
return false;
}
return true;
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index e5eef670735e..224d161a5a22 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -40,39 +40,39 @@
* depending on memory access size X.
*/
-static __always_inline bool memory_is_poisoned_1(unsigned long addr)
+static __always_inline bool memory_is_poisoned_1(const void *addr)
{
- s8 shadow_value = *(s8 *)kasan_mem_to_shadow((void *)addr);
+ s8 shadow_value = *(s8 *)kasan_mem_to_shadow(addr);
if (unlikely(shadow_value)) {
- s8 last_accessible_byte = addr & KASAN_GRANULE_MASK;
+ s8 last_accessible_byte = (unsigned long)addr & KASAN_GRANULE_MASK;
return unlikely(last_accessible_byte >= shadow_value);
}
return false;
}
-static __always_inline bool memory_is_poisoned_2_4_8(unsigned long addr,
+static __always_inline bool memory_is_poisoned_2_4_8(const void *addr,
unsigned long size)
{
- u8 *shadow_addr = (u8 *)kasan_mem_to_shadow((void *)addr);
+ u8 *shadow_addr = (u8 *)kasan_mem_to_shadow(addr);
/*
* Access crosses 8(shadow size)-byte boundary. Such access maps
* into 2 shadow bytes, so we need to check them both.
*/
- if (unlikely(((addr + size - 1) & KASAN_GRANULE_MASK) < size - 1))
+ if (unlikely((((unsigned long)addr + size - 1) & KASAN_GRANULE_MASK) < size - 1))
return *shadow_addr || memory_is_poisoned_1(addr + size - 1);
return memory_is_poisoned_1(addr + size - 1);
}
-static __always_inline bool memory_is_poisoned_16(unsigned long addr)
+static __always_inline bool memory_is_poisoned_16(const void *addr)
{
- u16 *shadow_addr = (u16 *)kasan_mem_to_shadow((void *)addr);
+ u16 *shadow_addr = (u16 *)kasan_mem_to_shadow(addr);
/* Unaligned 16-bytes access maps into 3 shadow bytes. */
- if (unlikely(!IS_ALIGNED(addr, KASAN_GRANULE_SIZE)))
+ if (unlikely(!IS_ALIGNED((unsigned long)addr, KASAN_GRANULE_SIZE)))
return *shadow_addr || memory_is_poisoned_1(addr + 15);
return *shadow_addr;
@@ -120,26 +120,25 @@ static __always_inline unsigned long memory_is_nonzero(const void *start,
return bytes_is_nonzero(start, (end - start) % 8);
}
-static __always_inline bool memory_is_poisoned_n(unsigned long addr,
- size_t size)
+static __always_inline bool memory_is_poisoned_n(const void *addr, size_t size)
{
unsigned long ret;
- ret = memory_is_nonzero(kasan_mem_to_shadow((void *)addr),
- kasan_mem_to_shadow((void *)addr + size - 1) + 1);
+ ret = memory_is_nonzero(kasan_mem_to_shadow(addr),
+ kasan_mem_to_shadow(addr + size - 1) + 1);
if (unlikely(ret)) {
- unsigned long last_byte = addr + size - 1;
- s8 *last_shadow = (s8 *)kasan_mem_to_shadow((void *)last_byte);
+ const void *last_byte = addr + size - 1;
+ s8 *last_shadow = (s8 *)kasan_mem_to_shadow(last_byte);
if (unlikely(ret != (unsigned long)last_shadow ||
- ((long)(last_byte & KASAN_GRANULE_MASK) >= *last_shadow)))
+ (((long)last_byte & KASAN_GRANULE_MASK) >= *last_shadow)))
return true;
}
return false;
}
-static __always_inline bool memory_is_poisoned(unsigned long addr, size_t size)
+static __always_inline bool memory_is_poisoned(const void *addr, size_t size)
{
if (__builtin_constant_p(size)) {
switch (size) {
@@ -159,7 +158,7 @@ static __always_inline bool memory_is_poisoned(unsigned long addr, size_t size)
return memory_is_poisoned_n(addr, size);
}
-static __always_inline bool check_region_inline(unsigned long addr,
+static __always_inline bool check_region_inline(const void *addr,
size_t size, bool write,
unsigned long ret_ip)
{
@@ -172,7 +171,7 @@ static __always_inline bool check_region_inline(unsigned long addr,
if (unlikely(addr + size < addr))
return !kasan_report(addr, size, write, ret_ip);
- if (unlikely(!addr_has_metadata((void *)addr)))
+ if (unlikely(!addr_has_metadata(addr)))
return !kasan_report(addr, size, write, ret_ip);
if (likely(!memory_is_poisoned(addr, size)))
@@ -181,7 +180,7 @@ static __always_inline bool check_region_inline(unsigned long addr,
return !kasan_report(addr, size, write, ret_ip);
}
-bool kasan_check_range(unsigned long addr, size_t size, bool write,
+bool kasan_check_range(const void *addr, size_t size, bool write,
unsigned long ret_ip)
{
return check_region_inline(addr, size, write, ret_ip);
@@ -221,36 +220,37 @@ static void register_global(struct kasan_global *global)
KASAN_GLOBAL_REDZONE, false);
}
-void __asan_register_globals(struct kasan_global *globals, size_t size)
+void __asan_register_globals(void *ptr, ssize_t size)
{
int i;
+ struct kasan_global *globals = ptr;
for (i = 0; i < size; i++)
register_global(&globals[i]);
}
EXPORT_SYMBOL(__asan_register_globals);
-void __asan_unregister_globals(struct kasan_global *globals, size_t size)
+void __asan_unregister_globals(void *ptr, ssize_t size)
{
}
EXPORT_SYMBOL(__asan_unregister_globals);
#define DEFINE_ASAN_LOAD_STORE(size) \
- void __asan_load##size(unsigned long addr) \
+ void __asan_load##size(void *addr) \
{ \
check_region_inline(addr, size, false, _RET_IP_); \
} \
EXPORT_SYMBOL(__asan_load##size); \
__alias(__asan_load##size) \
- void __asan_load##size##_noabort(unsigned long); \
+ void __asan_load##size##_noabort(void *); \
EXPORT_SYMBOL(__asan_load##size##_noabort); \
- void __asan_store##size(unsigned long addr) \
+ void __asan_store##size(void *addr) \
{ \
check_region_inline(addr, size, true, _RET_IP_); \
} \
EXPORT_SYMBOL(__asan_store##size); \
__alias(__asan_store##size) \
- void __asan_store##size##_noabort(unsigned long); \
+ void __asan_store##size##_noabort(void *); \
EXPORT_SYMBOL(__asan_store##size##_noabort)
DEFINE_ASAN_LOAD_STORE(1);
@@ -259,24 +259,24 @@ DEFINE_ASAN_LOAD_STORE(4);
DEFINE_ASAN_LOAD_STORE(8);
DEFINE_ASAN_LOAD_STORE(16);
-void __asan_loadN(unsigned long addr, size_t size)
+void __asan_loadN(void *addr, ssize_t size)
{
kasan_check_range(addr, size, false, _RET_IP_);
}
EXPORT_SYMBOL(__asan_loadN);
__alias(__asan_loadN)
-void __asan_loadN_noabort(unsigned long, size_t);
+void __asan_loadN_noabort(void *, ssize_t);
EXPORT_SYMBOL(__asan_loadN_noabort);
-void __asan_storeN(unsigned long addr, size_t size)
+void __asan_storeN(void *addr, ssize_t size)
{
kasan_check_range(addr, size, true, _RET_IP_);
}
EXPORT_SYMBOL(__asan_storeN);
__alias(__asan_storeN)
-void __asan_storeN_noabort(unsigned long, size_t);
+void __asan_storeN_noabort(void *, ssize_t);
EXPORT_SYMBOL(__asan_storeN_noabort);
/* to shut up compiler complaints */
@@ -284,7 +284,7 @@ void __asan_handle_no_return(void) {}
EXPORT_SYMBOL(__asan_handle_no_return);
/* Emitted by compiler to poison alloca()ed objects. */
-void __asan_alloca_poison(unsigned long addr, size_t size)
+void __asan_alloca_poison(void *addr, ssize_t size)
{
size_t rounded_up_size = round_up(size, KASAN_GRANULE_SIZE);
size_t padding_size = round_up(size, KASAN_ALLOCA_REDZONE_SIZE) -
@@ -295,7 +295,7 @@ void __asan_alloca_poison(unsigned long addr, size_t size)
KASAN_ALLOCA_REDZONE_SIZE);
const void *right_redzone = (const void *)(addr + rounded_up_size);
- WARN_ON(!IS_ALIGNED(addr, KASAN_ALLOCA_REDZONE_SIZE));
+ WARN_ON(!IS_ALIGNED((unsigned long)addr, KASAN_ALLOCA_REDZONE_SIZE));
kasan_unpoison((const void *)(addr + rounded_down_size),
size - rounded_down_size, false);
@@ -307,18 +307,18 @@ void __asan_alloca_poison(unsigned long addr, size_t size)
EXPORT_SYMBOL(__asan_alloca_poison);
/* Emitted by compiler to unpoison alloca()ed areas when the stack unwinds. */
-void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom)
+void __asan_allocas_unpoison(void *stack_top, ssize_t stack_bottom)
{
- if (unlikely(!stack_top || stack_top > stack_bottom))
+ if (unlikely(!stack_top || stack_top > (void *)stack_bottom))
return;
- kasan_unpoison(stack_top, stack_bottom - stack_top, false);
+ kasan_unpoison(stack_top, (void *)stack_bottom - stack_top, false);
}
EXPORT_SYMBOL(__asan_allocas_unpoison);
/* Emitted by the compiler to [un]poison local variables. */
#define DEFINE_ASAN_SET_SHADOW(byte) \
- void __asan_set_shadow_##byte(const void *addr, size_t size) \
+ void __asan_set_shadow_##byte(const void *addr, ssize_t size) \
{ \
__memset((void *)addr, 0x##byte, size); \
} \
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index cd846ca34f44..b799f11e45dc 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -198,13 +198,13 @@ enum kasan_report_type {
struct kasan_report_info {
/* Filled in by kasan_report_*(). */
enum kasan_report_type type;
- void *access_addr;
+ const void *access_addr;
size_t access_size;
bool is_write;
unsigned long ip;
/* Filled in by the common reporting code. */
- void *first_bad_addr;
+ const void *first_bad_addr;
struct kmem_cache *cache;
void *object;
size_t alloc_size;
@@ -311,7 +311,7 @@ static __always_inline bool addr_has_metadata(const void *addr)
* @ret_ip: return address
* @return: true if access was valid, false if invalid
*/
-bool kasan_check_range(unsigned long addr, size_t size, bool write,
+bool kasan_check_range(const void *addr, size_t size, bool write,
unsigned long ret_ip);
#else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
@@ -323,7 +323,7 @@ static __always_inline bool addr_has_metadata(const void *addr)
#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
-void *kasan_find_first_bad_addr(void *addr, size_t size);
+const void *kasan_find_first_bad_addr(const void *addr, size_t size);
size_t kasan_get_alloc_size(void *object, struct kmem_cache *cache);
void kasan_complete_mode_report_info(struct kasan_report_info *info);
void kasan_metadata_fetch_row(char *buffer, void *row);
@@ -346,7 +346,7 @@ void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object);
static inline void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object) { }
#endif
-bool kasan_report(unsigned long addr, size_t size,
+bool kasan_report(const void *addr, size_t size,
bool is_write, unsigned long ip);
void kasan_report_invalid_free(void *object, unsigned long ip, enum kasan_report_type type);
@@ -571,82 +571,82 @@ void kasan_restore_multi_shot(bool enabled);
*/
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_register_globals(void *globals, ssize_t size);
+void __asan_unregister_globals(void *globals, ssize_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);
-
-void *__asan_memset(void *addr, int c, size_t len);
-void *__asan_memmove(void *dest, const void *src, size_t len);
-void *__asan_memcpy(void *dest, const void *src, size_t len);
-
-void __hwasan_load1_noabort(unsigned long addr);
-void __hwasan_store1_noabort(unsigned long addr);
-void __hwasan_load2_noabort(unsigned long addr);
-void __hwasan_store2_noabort(unsigned long addr);
-void __hwasan_load4_noabort(unsigned long addr);
-void __hwasan_store4_noabort(unsigned long addr);
-void __hwasan_load8_noabort(unsigned long addr);
-void __hwasan_store8_noabort(unsigned long addr);
-void __hwasan_load16_noabort(unsigned long addr);
-void __hwasan_store16_noabort(unsigned long addr);
-void __hwasan_loadN_noabort(unsigned long addr, size_t size);
-void __hwasan_storeN_noabort(unsigned long addr, size_t size);
-
-void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size);
-
-void *__hwasan_memset(void *addr, int c, size_t len);
-void *__hwasan_memmove(void *dest, const void *src, size_t len);
-void *__hwasan_memcpy(void *dest, const void *src, size_t len);
-
-void kasan_tag_mismatch(unsigned long addr, unsigned long access_info,
+void __asan_alloca_poison(void *, ssize_t size);
+void __asan_allocas_unpoison(void *stack_top, ssize_t stack_bottom);
+
+void __asan_load1(void *);
+void __asan_store1(void *);
+void __asan_load2(void *);
+void __asan_store2(void *);
+void __asan_load4(void *);
+void __asan_store4(void *);
+void __asan_load8(void *);
+void __asan_store8(void *);
+void __asan_load16(void *);
+void __asan_store16(void *);
+void __asan_loadN(void *, ssize_t size);
+void __asan_storeN(void *, ssize_t size);
+
+void __asan_load1_noabort(void *);
+void __asan_store1_noabort(void *);
+void __asan_load2_noabort(void *);
+void __asan_store2_noabort(void *);
+void __asan_load4_noabort(void *);
+void __asan_store4_noabort(void *);
+void __asan_load8_noabort(void *);
+void __asan_store8_noabort(void *);
+void __asan_load16_noabort(void *);
+void __asan_store16_noabort(void *);
+void __asan_loadN_noabort(void *, ssize_t size);
+void __asan_storeN_noabort(void *, ssize_t size);
+
+void __asan_report_load1_noabort(void *);
+void __asan_report_store1_noabort(void *);
+void __asan_report_load2_noabort(void *);
+void __asan_report_store2_noabort(void *);
+void __asan_report_load4_noabort(void *);
+void __asan_report_store4_noabort(void *);
+void __asan_report_load8_noabort(void *);
+void __asan_report_store8_noabort(void *);
+void __asan_report_load16_noabort(void *);
+void __asan_report_store16_noabort(void *);
+void __asan_report_load_n_noabort(void *, ssize_t size);
+void __asan_report_store_n_noabort(void *, ssize_t size);
+
+void __asan_set_shadow_00(const void *addr, ssize_t size);
+void __asan_set_shadow_f1(const void *addr, ssize_t size);
+void __asan_set_shadow_f2(const void *addr, ssize_t size);
+void __asan_set_shadow_f3(const void *addr, ssize_t size);
+void __asan_set_shadow_f5(const void *addr, ssize_t size);
+void __asan_set_shadow_f8(const void *addr, ssize_t size);
+
+void *__asan_memset(void *addr, int c, ssize_t len);
+void *__asan_memmove(void *dest, const void *src, ssize_t len);
+void *__asan_memcpy(void *dest, const void *src, ssize_t len);
+
+void __hwasan_load1_noabort(void *);
+void __hwasan_store1_noabort(void *);
+void __hwasan_load2_noabort(void *);
+void __hwasan_store2_noabort(void *);
+void __hwasan_load4_noabort(void *);
+void __hwasan_store4_noabort(void *);
+void __hwasan_load8_noabort(void *);
+void __hwasan_store8_noabort(void *);
+void __hwasan_load16_noabort(void *);
+void __hwasan_store16_noabort(void *);
+void __hwasan_loadN_noabort(void *, ssize_t size);
+void __hwasan_storeN_noabort(void *, ssize_t size);
+
+void __hwasan_tag_memory(void *, u8 tag, ssize_t size);
+
+void *__hwasan_memset(void *addr, int c, ssize_t len);
+void *__hwasan_memmove(void *dest, const void *src, ssize_t len);
+void *__hwasan_memcpy(void *dest, const void *src, ssize_t len);
+
+void kasan_tag_mismatch(void *addr, unsigned long access_info,
unsigned long ret_ip);
#endif /* __MM_KASAN_KASAN_H */
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 892a9dc9d4d3..84d9f3b37014 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -211,7 +211,7 @@ static void start_report(unsigned long *flags, bool sync)
pr_err("==================================================================\n");
}
-static void end_report(unsigned long *flags, void *addr)
+static void end_report(unsigned long *flags, const void *addr)
{
if (addr)
trace_error_report_end(ERROR_DETECTOR_KASAN,
@@ -450,8 +450,8 @@ static void print_memory_metadata(const void *addr)
static void print_report(struct kasan_report_info *info)
{
- void *addr = kasan_reset_tag(info->access_addr);
- u8 tag = get_tag(info->access_addr);
+ void *addr = kasan_reset_tag((void *)info->access_addr);
+ u8 tag = get_tag((void *)info->access_addr);
print_error_description(info);
if (addr_has_metadata(addr))
@@ -468,12 +468,12 @@ static void print_report(struct kasan_report_info *info)
static void complete_report_info(struct kasan_report_info *info)
{
- void *addr = kasan_reset_tag(info->access_addr);
+ void *addr = kasan_reset_tag((void *)info->access_addr);
struct slab *slab;
if (info->type == KASAN_REPORT_ACCESS)
info->first_bad_addr = kasan_find_first_bad_addr(
- info->access_addr, info->access_size);
+ (void *)info->access_addr, info->access_size);
else
info->first_bad_addr = addr;
@@ -544,11 +544,10 @@ void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_ty
* user_access_save/restore(): kasan_report_invalid_free() cannot be called
* from a UACCESS region, and kasan_report_async() is not used on x86.
*/
-bool kasan_report(unsigned long addr, size_t size, bool is_write,
+bool kasan_report(const void *addr, size_t size, bool is_write,
unsigned long ip)
{
bool ret = true;
- void *ptr = (void *)addr;
unsigned long ua_flags = user_access_save();
unsigned long irq_flags;
struct kasan_report_info info;
@@ -562,7 +561,7 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write,
memset(&info, 0, sizeof(info));
info.type = KASAN_REPORT_ACCESS;
- info.access_addr = ptr;
+ info.access_addr = addr;
info.access_size = size;
info.is_write = is_write;
info.ip = ip;
@@ -571,7 +570,7 @@ bool kasan_report(unsigned long addr, size_t size, bool is_write,
print_report(&info);
- end_report(&irq_flags, ptr);
+ end_report(&irq_flags, (void *)addr);
out:
user_access_restore(ua_flags);
diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c
index 87d39bc0a673..51a1e8a8877f 100644
--- a/mm/kasan/report_generic.c
+++ b/mm/kasan/report_generic.c
@@ -30,9 +30,9 @@
#include "kasan.h"
#include "../slab.h"
-void *kasan_find_first_bad_addr(void *addr, size_t size)
+const void *kasan_find_first_bad_addr(const void *addr, size_t size)
{
- void *p = addr;
+ const void *p = addr;
if (!addr_has_metadata(p))
return p;
@@ -362,14 +362,14 @@ void kasan_print_address_stack_frame(const void *addr)
#endif /* CONFIG_KASAN_STACK */
#define DEFINE_ASAN_REPORT_LOAD(size) \
-void __asan_report_load##size##_noabort(unsigned long addr) \
+void __asan_report_load##size##_noabort(void *addr) \
{ \
kasan_report(addr, size, false, _RET_IP_); \
} \
EXPORT_SYMBOL(__asan_report_load##size##_noabort)
#define DEFINE_ASAN_REPORT_STORE(size) \
-void __asan_report_store##size##_noabort(unsigned long addr) \
+void __asan_report_store##size##_noabort(void *addr) \
{ \
kasan_report(addr, size, true, _RET_IP_); \
} \
@@ -386,13 +386,13 @@ DEFINE_ASAN_REPORT_STORE(4);
DEFINE_ASAN_REPORT_STORE(8);
DEFINE_ASAN_REPORT_STORE(16);
-void __asan_report_load_n_noabort(unsigned long addr, size_t size)
+void __asan_report_load_n_noabort(void *addr, ssize_t size)
{
kasan_report(addr, size, false, _RET_IP_);
}
EXPORT_SYMBOL(__asan_report_load_n_noabort);
-void __asan_report_store_n_noabort(unsigned long addr, size_t size)
+void __asan_report_store_n_noabort(void *addr, ssize_t size)
{
kasan_report(addr, size, true, _RET_IP_);
}
diff --git a/mm/kasan/report_hw_tags.c b/mm/kasan/report_hw_tags.c
index 32e80f78de7d..065e1b2fc484 100644
--- a/mm/kasan/report_hw_tags.c
+++ b/mm/kasan/report_hw_tags.c
@@ -15,7 +15,7 @@
#include "kasan.h"
-void *kasan_find_first_bad_addr(void *addr, size_t size)
+const void *kasan_find_first_bad_addr(const void *addr, size_t size)
{
/*
* Hardware Tag-Based KASAN only calls this function for normal memory
diff --git a/mm/kasan/report_sw_tags.c b/mm/kasan/report_sw_tags.c
index 8b1f5a73ee6d..689e94f9fe3c 100644
--- a/mm/kasan/report_sw_tags.c
+++ b/mm/kasan/report_sw_tags.c
@@ -30,7 +30,7 @@
#include "kasan.h"
#include "../slab.h"
-void *kasan_find_first_bad_addr(void *addr, size_t size)
+const void *kasan_find_first_bad_addr(const void *addr, size_t size)
{
u8 tag = get_tag(addr);
void *p = kasan_reset_tag(addr);
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index c8b86f3273b5..3e62728ae25d 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -28,13 +28,13 @@
bool __kasan_check_read(const volatile void *p, unsigned int size)
{
- return kasan_check_range((unsigned long)p, size, false, _RET_IP_);
+ return kasan_check_range((void *)p, size, false, _RET_IP_);
}
EXPORT_SYMBOL(__kasan_check_read);
bool __kasan_check_write(const volatile void *p, unsigned int size)
{
- return kasan_check_range((unsigned long)p, size, true, _RET_IP_);
+ return kasan_check_range((void *)p, size, true, _RET_IP_);
}
EXPORT_SYMBOL(__kasan_check_write);
@@ -50,7 +50,7 @@ EXPORT_SYMBOL(__kasan_check_write);
#undef memset
void *memset(void *addr, int c, size_t len)
{
- if (!kasan_check_range((unsigned long)addr, len, true, _RET_IP_))
+ if (!kasan_check_range(addr, len, true, _RET_IP_))
return NULL;
return __memset(addr, c, len);
@@ -60,8 +60,8 @@ void *memset(void *addr, int c, size_t len)
#undef memmove
void *memmove(void *dest, const void *src, size_t len)
{
- if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) ||
- !kasan_check_range((unsigned long)dest, len, true, _RET_IP_))
+ if (!kasan_check_range(src, len, false, _RET_IP_) ||
+ !kasan_check_range(dest, len, true, _RET_IP_))
return NULL;
return __memmove(dest, src, len);
@@ -71,17 +71,17 @@ void *memmove(void *dest, const void *src, size_t len)
#undef memcpy
void *memcpy(void *dest, const void *src, size_t len)
{
- if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) ||
- !kasan_check_range((unsigned long)dest, len, true, _RET_IP_))
+ if (!kasan_check_range(src, len, false, _RET_IP_) ||
+ !kasan_check_range(dest, len, true, _RET_IP_))
return NULL;
return __memcpy(dest, src, len);
}
#endif
-void *__asan_memset(void *addr, int c, size_t len)
+void *__asan_memset(void *addr, int c, ssize_t len)
{
- if (!kasan_check_range((unsigned long)addr, len, true, _RET_IP_))
+ if (!kasan_check_range(addr, len, true, _RET_IP_))
return NULL;
return __memset(addr, c, len);
@@ -89,10 +89,10 @@ void *__asan_memset(void *addr, int c, size_t len)
EXPORT_SYMBOL(__asan_memset);
#ifdef __HAVE_ARCH_MEMMOVE
-void *__asan_memmove(void *dest, const void *src, size_t len)
+void *__asan_memmove(void *dest, const void *src, ssize_t len)
{
- if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) ||
- !kasan_check_range((unsigned long)dest, len, true, _RET_IP_))
+ if (!kasan_check_range(src, len, false, _RET_IP_) ||
+ !kasan_check_range(dest, len, true, _RET_IP_))
return NULL;
return __memmove(dest, src, len);
@@ -100,10 +100,10 @@ void *__asan_memmove(void *dest, const void *src, size_t len)
EXPORT_SYMBOL(__asan_memmove);
#endif
-void *__asan_memcpy(void *dest, const void *src, size_t len)
+void *__asan_memcpy(void *dest, const void *src, ssize_t len)
{
- if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) ||
- !kasan_check_range((unsigned long)dest, len, true, _RET_IP_))
+ if (!kasan_check_range(src, len, false, _RET_IP_) ||
+ !kasan_check_range(dest, len, true, _RET_IP_))
return NULL;
return __memcpy(dest, src, len);
@@ -111,13 +111,13 @@ void *__asan_memcpy(void *dest, const void *src, size_t len)
EXPORT_SYMBOL(__asan_memcpy);
#ifdef CONFIG_KASAN_SW_TAGS
-void *__hwasan_memset(void *addr, int c, size_t len) __alias(__asan_memset);
+void *__hwasan_memset(void *addr, int c, ssize_t len) __alias(__asan_memset);
EXPORT_SYMBOL(__hwasan_memset);
#ifdef __HAVE_ARCH_MEMMOVE
-void *__hwasan_memmove(void *dest, const void *src, size_t len) __alias(__asan_memmove);
+void *__hwasan_memmove(void *dest, const void *src, ssize_t len) __alias(__asan_memmove);
EXPORT_SYMBOL(__hwasan_memmove);
#endif
-void *__hwasan_memcpy(void *dest, const void *src, size_t len) __alias(__asan_memcpy);
+void *__hwasan_memcpy(void *dest, const void *src, ssize_t len) __alias(__asan_memcpy);
EXPORT_SYMBOL(__hwasan_memcpy);
#endif
diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c
index 30da65fa02a1..220b5d4c6876 100644
--- a/mm/kasan/sw_tags.c
+++ b/mm/kasan/sw_tags.c
@@ -70,8 +70,8 @@ u8 kasan_random_tag(void)
return (u8)(state % (KASAN_TAG_MAX + 1));
}
-bool kasan_check_range(unsigned long addr, size_t size, bool write,
- unsigned long ret_ip)
+bool kasan_check_range(const void *addr, size_t size, bool write,
+ unsigned long ret_ip)
{
u8 tag;
u8 *shadow_first, *shadow_last, *shadow;
@@ -133,12 +133,12 @@ bool kasan_byte_accessible(const void *addr)
}
#define DEFINE_HWASAN_LOAD_STORE(size) \
- void __hwasan_load##size##_noabort(unsigned long addr) \
+ void __hwasan_load##size##_noabort(void *addr) \
{ \
- kasan_check_range(addr, size, false, _RET_IP_); \
+ kasan_check_range(addr, size, false, _RET_IP_); \
} \
EXPORT_SYMBOL(__hwasan_load##size##_noabort); \
- void __hwasan_store##size##_noabort(unsigned long addr) \
+ void __hwasan_store##size##_noabort(void *addr) \
{ \
kasan_check_range(addr, size, true, _RET_IP_); \
} \
@@ -150,25 +150,25 @@ DEFINE_HWASAN_LOAD_STORE(4);
DEFINE_HWASAN_LOAD_STORE(8);
DEFINE_HWASAN_LOAD_STORE(16);
-void __hwasan_loadN_noabort(unsigned long addr, unsigned long size)
+void __hwasan_loadN_noabort(void *addr, ssize_t size)
{
kasan_check_range(addr, size, false, _RET_IP_);
}
EXPORT_SYMBOL(__hwasan_loadN_noabort);
-void __hwasan_storeN_noabort(unsigned long addr, unsigned long size)
+void __hwasan_storeN_noabort(void *addr, ssize_t size)
{
kasan_check_range(addr, size, true, _RET_IP_);
}
EXPORT_SYMBOL(__hwasan_storeN_noabort);
-void __hwasan_tag_memory(unsigned long addr, u8 tag, unsigned long size)
+void __hwasan_tag_memory(void *addr, u8 tag, ssize_t size)
{
- kasan_poison((void *)addr, size, tag, false);
+ kasan_poison(addr, size, tag, false);
}
EXPORT_SYMBOL(__hwasan_tag_memory);
-void kasan_tag_mismatch(unsigned long addr, unsigned long access_info,
+void kasan_tag_mismatch(void *addr, unsigned long access_info,
unsigned long ret_ip)
{
kasan_report(addr, 1 << (access_info & 0xf), access_info & 0x10,
--
2.35.1
More information about the linux-arm-kernel
mailing list