From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: lib/ubsan.c: fix gcc-10 warnings
The latest compiler expects slightly different function prototypes
for the ubsan helpers:
lib/ubsan.c:192:6: error: conflicting types for built-in function '__ubsan_handle_add_overflow'; expected 'void(void *, void *, void *)' [-Werror=builtin-declaration-mismatch]
192 | void __ubsan_handle_add_overflow(struct overflow_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:200:6: error: conflicting types for built-in function '__ubsan_handle_sub_overflow'; expected 'void(void *, void *, void *)' [-Werror=builtin-declaration-mismatch]
200 | void __ubsan_handle_sub_overflow(struct overflow_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:207:6: error: conflicting types for built-in function '__ubsan_handle_mul_overflow'; expected 'void(void *, void *, void *)' [-Werror=builtin-declaration-mismatch]
207 | void __ubsan_handle_mul_overflow(struct overflow_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:214:6: error: conflicting types for built-in function '__ubsan_handle_negate_overflow'; expected 'void(void *, void *)' [-Werror=builtin-declaration-mismatch]
214 | void __ubsan_handle_negate_overflow(struct overflow_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/ubsan.c:234:6: error: conflicting types for built-in function '__ubsan_handle_divrem_overflow'; expected 'void(void *, void *, void *)' [-Werror=builtin-declaration-mismatch]
234 | void __ubsan_handle_divrem_overflow(struct overflow_data *data,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Change the Linux implementation to match these, using a local typed
pointer.
Link: http://lkml.kernel.org/r/20200429185948.4189600-1-arnd@xxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/ubsan.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
--- a/lib/ubsan.c~ubsan-fix-gcc-10-warnings
+++ a/lib/ubsan.c
@@ -189,7 +189,7 @@ static void handle_overflow(struct overf
ubsan_epilogue();
}
-void __ubsan_handle_add_overflow(struct overflow_data *data,
+void __ubsan_handle_add_overflow(void *data,
void *lhs, void *rhs)
{
@@ -197,23 +197,23 @@ void __ubsan_handle_add_overflow(struct
}
EXPORT_SYMBOL(__ubsan_handle_add_overflow);
-void __ubsan_handle_sub_overflow(struct overflow_data *data,
+void __ubsan_handle_sub_overflow(void *data,
void *lhs, void *rhs)
{
handle_overflow(data, lhs, rhs, '-');
}
EXPORT_SYMBOL(__ubsan_handle_sub_overflow);
-void __ubsan_handle_mul_overflow(struct overflow_data *data,
+void __ubsan_handle_mul_overflow(void *data,
void *lhs, void *rhs)
{
handle_overflow(data, lhs, rhs, '*');
}
EXPORT_SYMBOL(__ubsan_handle_mul_overflow);
-void __ubsan_handle_negate_overflow(struct overflow_data *data,
- void *old_val)
+void __ubsan_handle_negate_overflow(void *_data, void *old_val)
{
+ struct overflow_data *data = _data;
char old_val_str[VALUE_LENGTH];
if (suppress_report(&data->location))
@@ -231,9 +231,9 @@ void __ubsan_handle_negate_overflow(stru
EXPORT_SYMBOL(__ubsan_handle_negate_overflow);
-void __ubsan_handle_divrem_overflow(struct overflow_data *data,
- void *lhs, void *rhs)
+void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
{
+ struct overflow_data *data = _data;
char rhs_val_str[VALUE_LENGTH];
if (suppress_report(&data->location))
@@ -326,10 +326,9 @@ void __ubsan_handle_type_mismatch(struct
}
EXPORT_SYMBOL(__ubsan_handle_type_mismatch);
-void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data_v1 *data,
- void *ptr)
+void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
{
-
+ struct type_mismatch_data_v1 *data = _data;
struct type_mismatch_data_common common_data = {
.location = &data->location,
.type = data->type,
@@ -341,8 +340,9 @@ void __ubsan_handle_type_mismatch_v1(str
}
EXPORT_SYMBOL(__ubsan_handle_type_mismatch_v1);
-void __ubsan_handle_out_of_bounds(struct out_of_bounds_data *data, void *index)
+void __ubsan_handle_out_of_bounds(void *_data, void *index)
{
+ struct out_of_bounds_data *data = _data;
char index_str[VALUE_LENGTH];
if (suppress_report(&data->location))
@@ -357,9 +357,9 @@ void __ubsan_handle_out_of_bounds(struct
}
EXPORT_SYMBOL(__ubsan_handle_out_of_bounds);
-void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data,
- void *lhs, void *rhs)
+void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
{
+ struct shift_out_of_bounds_data *data = _data;
struct type_descriptor *rhs_type = data->rhs_type;
struct type_descriptor *lhs_type = data->lhs_type;
char rhs_str[VALUE_LENGTH];
@@ -399,8 +399,9 @@ out:
EXPORT_SYMBOL(__ubsan_handle_shift_out_of_bounds);
-void __ubsan_handle_builtin_unreachable(struct unreachable_data *data)
+void __ubsan_handle_builtin_unreachable(void *_data)
{
+ struct unreachable_data *data = _data;
ubsan_prologue(&data->location, "unreachable");
pr_err("calling __builtin_unreachable()\n");
ubsan_epilogue();
@@ -408,9 +409,9 @@ void __ubsan_handle_builtin_unreachable(
}
EXPORT_SYMBOL(__ubsan_handle_builtin_unreachable);
-void __ubsan_handle_load_invalid_value(struct invalid_value_data *data,
- void *val)
+void __ubsan_handle_load_invalid_value(void *_data, void *val)
{
+ struct invalid_value_data *data = _data;
char val_str[VALUE_LENGTH];
if (suppress_report(&data->location))
_
