diff --git a/mindspore/ccsrc/backend/kernel_compiler/cpu/scatter_nd_update_cpu_kernel.cc b/mindspore/ccsrc/backend/kernel_compiler/cpu/scatter_nd_update_cpu_kernel.cc
index d7608983d19..4a74b94dd47 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/cpu/scatter_nd_update_cpu_kernel.cc
+++ b/mindspore/ccsrc/backend/kernel_compiler/cpu/scatter_nd_update_cpu_kernel.cc
@@ -40,8 +40,8 @@ void Compute(const ComputeParams<T> *params, const size_t start, const size_t en
       }
       offset += index * out_strides->at(j) * params->unit_size_;
     }
-    auto ret =
-      memcpy_s(x + offset, params->x_mem_size_, updates + params->unit_size_ * i, params->unit_size_ * sizeof(T));
+    auto ret = memcpy_s(x + offset, params->x_mem_size_ - offset, updates + params->unit_size_ * i,
+                        params->unit_size_ * sizeof(T));
     if (ret != 0) {
       MS_LOG(EXCEPTION) << "memcpy_s error, errorno" << ret;
     }
diff --git a/mindspore/ccsrc/debug/draw.cc b/mindspore/ccsrc/debug/draw.cc
index 45b38dd5dc9..734ae7081af 100644
--- a/mindspore/ccsrc/debug/draw.cc
+++ b/mindspore/ccsrc/debug/draw.cc
@@ -33,10 +33,8 @@
 #include "debug/common.h"
 
 namespace mindspore {
-
 // namespace to support debug utils
 namespace draw {
-
 namespace {
 // Only for ValueNode
 std::string ValueType(const ValueNodePtr &node) {
@@ -44,7 +42,7 @@ std::string ValueType(const ValueNodePtr &node) {
     return "";
   }
   auto v = node->value();
-
+  MS_EXCEPTION_IF_NULL(v);
   return v->type_name();
 }
 
@@ -230,7 +228,7 @@ void DrawUserFuncGraph(const std::string &, const FuncGraphPtr &) {
 }
 #endif
 
-std::string Graphviz::Shape(AnfNodePtr node) {
+std::string Graphviz::Shape(const AnfNodePtr &node) {
   if (node == nullptr) {
     return "";
   }
@@ -302,7 +300,7 @@ void BaseDigraph::Tail(const FuncGraphPtr &func_graph) {
   buffer_ << "node" << func_graph->get_return() << "_" << 0;
 }
 
-void BaseDigraph::Edge(AnfNodePtr start, FuncGraphPtr end, int id_start) {
+void BaseDigraph::Edge(const AnfNodePtr &start, const FuncGraphPtr &end, int id_start) {
   Head(start, id_start);
   buffer_ << "->";
   Tail(end);
@@ -521,7 +519,7 @@ static void DrawCNode(Graphviz *const graph_obj, const CNodePtr &node) {
   graph_obj->buffer() << "</table>>,";
 }
 
-void Digraph::Node(AnfNodePtr node, int id) {
+void Digraph::Node(const AnfNodePtr &node, int id) {
   if (node == nullptr) {
     return;
   }
@@ -558,7 +556,7 @@ void Digraph::Node(AnfNodePtr node, int id) {
   buffer_ << "]" << std::endl;
 }
 
-void Digraph::Edge(AnfNodePtr start, AnfNodePtr end, int idx, int id_start) {
+void Digraph::Edge(const AnfNodePtr &start, const AnfNodePtr &end, int idx, int id_start) {
   if (start == nullptr || end == nullptr) {
     return;
   }
@@ -591,7 +589,7 @@ ModelDigraph::~ModelDigraph() {
   }
 }
 
-std::string ModelDigraph::Shape(AnfNodePtr node) {
+std::string ModelDigraph::Shape(const AnfNodePtr &node) {
   if (node == nullptr) {
     return "";
   }
@@ -611,7 +609,7 @@ std::string ModelDigraph::Shape(AnfNodePtr node) {
   return "plaintext";
 }
 
-void ModelDigraph::Node(AnfNodePtr node, int id) {
+void ModelDigraph::Node(const AnfNodePtr &node, int id) {
   if (node == nullptr) {
     return;
   }
@@ -644,7 +642,7 @@ void ModelDigraph::Node(AnfNodePtr node, int id) {
   buffer_ << "]" << std::endl;
 }
 
-void ModelDigraph::Edge(AnfNodePtr start, AnfNodePtr end, int idx, int id_start) {
+void ModelDigraph::Edge(const AnfNodePtr &start, const AnfNodePtr &end, int idx, int id_start) {
   if (start == nullptr || end == nullptr) {
     return;
   }
diff --git a/mindspore/ccsrc/debug/draw.h b/mindspore/ccsrc/debug/draw.h
index c62fb68e06e..85a6af5d1e1 100644
--- a/mindspore/ccsrc/debug/draw.h
+++ b/mindspore/ccsrc/debug/draw.h
@@ -37,7 +37,7 @@ class Graphviz {
   virtual void Start() {}
   virtual void End() {}
 
-  virtual std::string Shape(AnfNodePtr node);
+  virtual std::string Shape(const AnfNodePtr &node);
   std::string Color(const AnfNodePtr &node);
   std::ostringstream &buffer() { return buffer_; }
   std::ostringstream buffer_;
@@ -54,12 +54,12 @@ class BaseDigraph : public Graphviz {
   explicit BaseDigraph(const std::string &name) : Graphviz(name) {}
   ~BaseDigraph() override = default;
 
-  virtual void Node(AnfNodePtr node, int id = 0) = 0;
-  virtual void Edge(AnfNodePtr start, AnfNodePtr end, int idx, int idx_start = 0) = 0;
+  virtual void Node(const AnfNodePtr &node, int id = 0) = 0;
+  virtual void Edge(const AnfNodePtr &start, const AnfNodePtr &end, int idx, int idx_start = 0) = 0;
 
   void Start() override;
   void End() override;
-  virtual void Edge(AnfNodePtr start, FuncGraphPtr end, int id_start);
+  virtual void Edge(const AnfNodePtr &start, const FuncGraphPtr &end, int id_start);
   void FuncGraphParameters(const FuncGraphPtr &key);
   void SubGraph(const FuncGraphPtr &key, const std::shared_ptr<BaseDigraph> &gsub);
 
@@ -77,8 +77,8 @@ class Digraph : public BaseDigraph {
   explicit Digraph(const std::string &name) : BaseDigraph(name) {}
   ~Digraph() override;
 
-  void Node(AnfNodePtr node, int id = 0) override;
-  void Edge(AnfNodePtr start, AnfNodePtr end, int idx, int idx_start = 0) override;
+  void Node(const AnfNodePtr &node, int id = 0) override;
+  void Edge(const AnfNodePtr &start, const AnfNodePtr &end, int idx, int idx_start = 0) override;
 };
 
 class ModelDigraph : public BaseDigraph {
@@ -87,9 +87,9 @@ class ModelDigraph : public BaseDigraph {
   explicit ModelDigraph(const std::string &name) : BaseDigraph(name) {}
   ~ModelDigraph() override;
 
-  std::string Shape(AnfNodePtr node) override;
-  void Node(AnfNodePtr node, int id = 0) override;
-  void Edge(AnfNodePtr start, AnfNodePtr end, int idx, int idx_start = 0) override;
+  std::string Shape(const AnfNodePtr &node) override;
+  void Node(const AnfNodePtr &node, int id = 0) override;
+  void Edge(const AnfNodePtr &start, const AnfNodePtr &end, int idx, int idx_start = 0) override;
 };
 
 // API to draw
diff --git a/mindspore/ccsrc/debug/dump_proto.cc b/mindspore/ccsrc/debug/dump_proto.cc
index 6555db9f32c..180f952dfd4 100644
--- a/mindspore/ccsrc/debug/dump_proto.cc
+++ b/mindspore/ccsrc/debug/dump_proto.cc
@@ -106,6 +106,7 @@ static irpb::DataType GetNumberDataType(const TypePtr &type) {
 }
 
 void CheckIfValidType(const TypePtr &type) {
+  MS_EXCEPTION_IF_NULL(type);
   if (type->isa<Problem>()) {
     MS_LOG(WARNING) << "The type: " << type->type_name();
   }
diff --git a/mindspore/ccsrc/debug/trace.cc b/mindspore/ccsrc/debug/trace.cc
index bbafe7e00f2..d3a5f5f6bb7 100644
--- a/mindspore/ccsrc/debug/trace.cc
+++ b/mindspore/ccsrc/debug/trace.cc
@@ -64,7 +64,7 @@ std::string GetAbstractStr(const abstract::AbstractBasePtr &abs) {
   return oss.str();
 }
 
-std::string GetGraphParamString(const FuncGraphPtr &graph, abstract::AbstractBasePtrList args_spec_list) {
+std::string GetGraphParamString(const FuncGraphPtr &graph, const abstract::AbstractBasePtrList &args_spec_list) {
   MS_EXCEPTION_IF_NULL(graph);
   std::ostringstream oss;
   oss << "graph:" << graph->ToString() << " with args[";
@@ -219,6 +219,8 @@ AbstractBasePtr AnalyzeFailExporter::GetNodeAbstract(const AnfNodePtr &node) {
 }
 
 AnfNodeConfigPtr AnalyzeFailExporter::GetFordwardConfig(const AnfNodeConfigPtr &cfg) {
+  MS_EXCEPTION_IF_NULL(cfg);
+  MS_EXCEPTION_IF_NULL(engine_);
   AnfNodeConfigPtr cur_cfg = cfg;
   auto iter = engine_->anfnode_config_map().find(cur_cfg);
   while (iter != engine_->anfnode_config_map().end()) {
@@ -421,7 +423,7 @@ void GetEvalStackInfo(std::ostringstream &oss) {
   std::string last_location_info = "";
   for (size_t i = 0; i < stack.size(); ++i) {
     auto node_config = stack[i];
-
+    MS_EXCEPTION_IF_NULL(node_config);
     auto cnode = dyn_cast<CNode>(node_config->node());
     if (cnode == nullptr) {
       MS_LOG(DEBUG) << "CNode of elements[" << i << "] is nullptr.";