diff --git a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
index d2916c73b40393e2aad2e4bde6a533623a1eb72d..e5df50ce15653d981cd4e77e5787a1e00841d93a 100644
--- a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
+++ b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -69,12 +69,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
         return 0;
     }
 
-    if (size < OHOS::U32_AT_SIZE) {
-        return 0;
-    }
-
     /* Validate the length of size */
-    if (size == 0 || size > OHOS::FOO_MAX_LEN) {
+    if (size < OHOS::U32_AT_SIZE || size > OHOS::FOO_MAX_LEN) {
         return 0;
     }
 
diff --git a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.h b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.h
index 8c78aa05118fe38dc5afde11d58183f7a78109eb..16d982fef1bea79d7d9b0cd75184fbf0e2d8ec79 100644
--- a/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.h
+++ b/test/fuzztest/backupsa_fuzzer/backupsa_fuzzer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at