diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/BUILD.gn b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/BUILD.gn
index 14599431b0589051dec5db1c86ee9d3ca319c6ab..0dda93f8483d4d58bb54d34154ecaea759a35abb 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/BUILD.gn
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/BUILD.gn
@@ -44,6 +44,8 @@ ohos_fuzztest("HandlerOnRemoteSinkSvrDiedFuzzTest") {
 
   sources = [ "onremotesinksvrdied_fuzzer.cpp" ]
 
+  deps = [ "${interfaces_path}/innerkits/native_cpp/screen_sink:distributed_screen_sink_sdk" ]
+
   defines = [
     "HI_LOG_ENABLE",
     "DH_LOG_TAG=\"HandlerOnRemoteSinkSvrDiedFuzzTest\"",
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/onremotesinksvrdied_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/onremotesinksvrdied_fuzzer.cpp
index 52a91ac08d8843b9e0a5cb67b7f204a1df516d9c..6962303ed22ac1fbc5adbd387bfd02728ad1823e 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/onremotesinksvrdied_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_handler/handleronremotesinksvrdied_fuzzer/onremotesinksvrdied_fuzzer.cpp
@@ -26,7 +26,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void OnRemoteSinkSvrDiedFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size <= 0)) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }
 
@@ -34,7 +34,7 @@ void OnRemoteSinkSvrDiedFuzzTest(const uint8_t* data, size_t size)
 
     sptr<ISystemAbilityManager> samgr =
             SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
-    if (samgr != nullptr) {
+    if (samgr == nullptr) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyinitsink_fuzzer/initsink_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyinitsink_fuzzer/initsink_fuzzer.cpp
index a48900484ac6333edadfe56084bfde019bf5a146..df1d4c35ffa31aea2b43e151a3e290b27cf897ba 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyinitsink_fuzzer/initsink_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyinitsink_fuzzer/initsink_fuzzer.cpp
@@ -27,7 +27,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void InitSinkFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size <= sizeof(int32_t))) {
+    if ((data == nullptr) || (size <= 0)) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxysubscribelocalhardware_fuzzer/subscribelocalhardware_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxysubscribelocalhardware_fuzzer/subscribelocalhardware_fuzzer.cpp
index c3db6e4c573761672345f4a0c29430ee0221ec6d..c0dcb6d4da46fc5b5a11b6195e4abf4c6f24e15e 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxysubscribelocalhardware_fuzzer/subscribelocalhardware_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxysubscribelocalhardware_fuzzer/subscribelocalhardware_fuzzer.cpp
@@ -27,7 +27,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void SubscribeLocalHardwareFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size <= sizeof(int32_t))) {
+    if ((data == nullptr) || (size <= 0)) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyunsubscribelocalhardware_fuzzer/unsubscribelocalhardware_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyunsubscribelocalhardware_fuzzer/unsubscribelocalhardware_fuzzer.cpp
index e98d94ee641e5c7931758604b1412593b7216af6..6d0596f227b98546767c7818070e3c9ac963efd4 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyunsubscribelocalhardware_fuzzer/unsubscribelocalhardware_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/proxyunsubscribelocalhardware_fuzzer/unsubscribelocalhardware_fuzzer.cpp
@@ -27,7 +27,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void UnsubscribeLocalHardwareFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size <= sizeof(int32_t))) {
+    if ((data == nullptr) || (size <= 0)) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/sinkproxydscreennotify_fuzzer/sinkproxydscreennotify_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/sinkproxydscreennotify_fuzzer/sinkproxydscreennotify_fuzzer.cpp
index 9d3ecdb36e15189ce7bf5c88dae52760cfa1a062..f33a9c7cdb21c9a07897f5d1e166493cfc656b2f 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/sinkproxydscreennotify_fuzzer/sinkproxydscreennotify_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_sink_proxy/sinkproxydscreennotify_fuzzer/sinkproxydscreennotify_fuzzer.cpp
@@ -27,7 +27,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void DScreenNotifyFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size <= sizeof(int32_t))) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }