diff --git a/mindspore/lite/tools/benchmark/benchmark.cc b/mindspore/lite/tools/benchmark/benchmark.cc
index 80eb56ac78..3ed0700f6f 100644
--- a/mindspore/lite/tools/benchmark/benchmark.cc
+++ b/mindspore/lite/tools/benchmark/benchmark.cc
@@ -427,10 +427,8 @@ int Benchmark::RunBenchmark() {
       return ret;
     }
   }
-  if (model == nullptr) {
-    MS_LOG(ERROR) << "model is null.";
+  if (model != nullptr) {
     model->Free();
-    return RET_NULL_PTR;
   }
   ms_inputs_ = session_->GetInputs();
   auto end_prepare_time = GetTimeUs();
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/trans_format_insert_pass.cc b/mindspore/lite/tools/converter/legacy_optimizer/graph/trans_format_insert_pass.cc
index dfc239b9d8..e4c1ff4a00 100644
--- a/mindspore/lite/tools/converter/legacy_optimizer/graph/trans_format_insert_pass.cc
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/trans_format_insert_pass.cc
@@ -88,7 +88,10 @@ bool TransOpInsertPass::CanFusion(schema::MetaGraphT *graph, const std::unique_p
   auto total_node_count = input_node_indexes.size() + output_node_indexes.size();
   size_t half_count = total_node_count / 2;
   if (GetCNodeTType(*node) == schema::PrimitiveType_Activation) {
-    if (node->primitive->value.AsActivation()->type == schema::ActivationType_LEAKY_RELU) {
+    MS_ASSERT(node != nullptr);
+    MS_ASSERT(node->primitive != nullptr);
+    if (node->primitive->value.AsActivation() != nullptr &&
+        node->primitive->value.AsActivation()->type == schema::ActivationType_LEAKY_RELU) {
       return has_trans_count >= half_count;
     }
   }
@@ -223,6 +226,10 @@ STATUS TransOpInsertPass::Run(schema::MetaGraphT *graph) {
     changed = false;
     for (auto iter = graph->nodes.begin(); iter != graph->nodes.end(); iter++) {
       auto &node = *iter;
+      if (node == nullptr && node->primitive == nullptr) {
+        MS_LOG(ERROR) << "node or primitive null";
+        return RET_NULL_PTR;
+      }
       auto type = node->primitive->value.type;
       if (IsContain(has_insert_nodes, node.get()) || !IsContain(GetInsertOpList(), type)) {
         continue;