修改序列号变量存储方式

Signed-off-by: Nlaiguizhong <laiguizhong@huawei.com>
Change-Id: I78fcc478f08fdd40dde35fd4bf7f84fde2dcabf5

interfaces/innerkits/syspara/param_comm.c

@@ -191,7 +191,10 @@ INIT_LOCAL_API const char *GetSerial_(void)
 #ifdef LITEOS_SUPPORT
     return HalGetSerial();
 #else
-    static char ohos_serial[PARAM_VALUE_LEN_MAX]  = {0};
+    static char *ohos_serial = NULL;
+    if (ohos_serial == NULL) {
+        BEGET_CHECK((ohos_serial = (char *)calloc(1, PARAM_VALUE_LEN_MAX)) != NULL, return NULL);
+    }
     uint32_t len = PARAM_VALUE_LEN_MAX;
     int ret = SystemGetParameter("ohos.boot.sn", ohos_serial, &len);
     BEGET_CHECK(ret == 0, return NULL);