diff --git a/mindspore/ccsrc/plugin/device/cpu/kernel/nnacl/infer/deconv2d_infer.c b/mindspore/ccsrc/plugin/device/cpu/kernel/nnacl/infer/deconv2d_infer.c
index a40c8896ce7..9a7dc9977c7 100644
--- a/mindspore/ccsrc/plugin/device/cpu/kernel/nnacl/infer/deconv2d_infer.c
+++ b/mindspore/ccsrc/plugin/device/cpu/kernel/nnacl/infer/deconv2d_infer.c
@@ -54,6 +54,8 @@ int Deconv2dInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC
 
   int kernel_w = param->kernel_w_ != -1 ? param->kernel_w_ : GetWidth(weight);
   int kernel_h = param->kernel_h_ != -1 ? param->kernel_h_ : GetHeight(weight);
+  MS_CHECK_FALSE(kernel_w <= 0, NNACL_ERR);
+  MS_CHECK_FALSE(kernel_h <= 0, NNACL_ERR);
   MS_CHECK_FALSE(INT_MUL_OVERFLOW(kernel_h, kernel_w), NNACL_ERR);
 
   int stride_w = param->stride_w_;
diff --git a/mindspore/lite/src/ops/populate/deconv2d_populate.cc b/mindspore/lite/src/ops/populate/deconv2d_populate.cc
index edb74396bb8..2e3b37ab7c8 100644
--- a/mindspore/lite/src/ops/populate/deconv2d_populate.cc
+++ b/mindspore/lite/src/ops/populate/deconv2d_populate.cc
@@ -28,8 +28,12 @@ int SetPadAndAct(schema::PadMode pad_mode, schema::ActivationType act_type, Conv
     case schema::PadMode_VALID:
       param->pad_mode_ = Pad_valid;
       break;
-    default:
+    case schema::PadMode_PAD:
       param->pad_mode_ = Pad_pad;
+      break;
+    default:
+      MS_LOG(ERROR) << "pad mode does not support, " << pad_mode;
+      return RET_NOT_SUPPORT;
   }
 
   switch (act_type) {
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/gatherNd_fp32.cc b/mindspore/lite/src/runtime/kernel/arm/fp32/gatherNd_fp32.cc
index 6f31ae53c3c..c7cbed6b7ca 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/gatherNd_fp32.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/gatherNd_fp32.cc
@@ -89,7 +89,7 @@ int GatherNdCPUKernel::InitOffset() {
     return RET_ERROR;
   }
   auto indices_ptr = reinterpret_cast<int *>(indices_tensor->data());
-  MS_ASSERT(indices_ptr != nullptr);
+  MS_CHECK_TRUE_MSG(indices_ptr != nullptr, RET_ERROR, "indices_ptr is nullptr.");
   area_ = 1;
   for (int i = idx_lastshape; i < in_rank; ++i) {
     area_ *= in_shape[i];
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/infershape_pass.cc b/mindspore/lite/tools/converter/legacy_optimizer/graph/infershape_pass.cc
index 5bdb663103c..5b3f7e4d903 100644
--- a/mindspore/lite/tools/converter/legacy_optimizer/graph/infershape_pass.cc
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/infershape_pass.cc
@@ -227,6 +227,7 @@ std::vector<Tensor *> ConvertTensorToLiteTensor(const MetaGraphT *graph, const s
         ConvertTensorList(graph, tensor_index, &convert_succ, &lite_tensors);
         break;
       case kObjectTypeString:
+        MS_CHECK_TRUE_MSG(tensorT->dims.size() <= 1, {}, "String type tensor dims should be less than or equal to 1.");
         ConvertString(graph, tensor_index, &convert_succ, &lite_tensors);
         break;
       default: