There was a problem converting the structure to JSON.
I have two structures
struct test_nested {
const char *test_string2;
int addition_array[9];
size_t addition_array_len;
};
struct test_struct {
struct test_nested some_nested_struct[16];
size_t some_nested_struct_len;
};And their description:
static const struct json_obj_descr nested_descr[] = {
JSON_OBJ_DESCR_PRIM(struct test_nested, test_string2, JSON_TOK_STRING),
JSON_OBJ_DESCR_ARRAY(struct test_nested, addition_array, 9, addition_array_len, JSON_TOK_NUMBER),
};
static const struct json_obj_descr test_descr[] = {
JSON_OBJ_DESCR_OBJ_ARRAY(struct test_struct, some_nested_struct, 16, some_nested_struct_len, nested_descr, ARRAY_SIZE(nested_descr)),
};
I create a structure and initialize:
struct test_struct ts = {
.some_nested_struct[0] = {
.test_string2 = "Hello bug2",
.addition_array[0] = 54,
.addition_array[1] = 4354,
.addition_array[2] = 5454,
.addition_array[3] = 544,
.addition_array[4] = 546,
.addition_array_len = 5,
},
.some_nested_struct[1] = {
.test_string2 = "Hello bug3",
.addition_array[0] = 654,
.addition_array[1] = 7698,
.addition_array[2] = 890,
.addition_array[3] = 890,
.addition_array_len = 4,
},
.some_nested_struct_len = 2,
};
Code for getting JSON:
char buffer[1024]; ssize_t ret = json_obj_encode_buf(test_descr, ARRAY_SIZE(test_descr), &ts, buffer, sizeof(buffer));
Using this structure, the json_obj_encode_buf function tries to access an inaccessible address.
This happens when the second element is processed .some_nested_struct [1]
I think that the offset of the address is not calculated correctly, which ultimately leads to the overwriting of the pointer.
This problem disappears when I remove the test_string2 from the structure.
Can anyone repeat this? Suddenly I'm not working with memory correctly
