diff --git a/mindspore/lite/java/java/app/src/main/java/com/mindspore/lite/Model.java b/mindspore/lite/java/java/app/src/main/java/com/mindspore/lite/Model.java
index 4e2a959a45..0b80c1be3b 100644
--- a/mindspore/lite/java/java/app/src/main/java/com/mindspore/lite/Model.java
+++ b/mindspore/lite/java/java/app/src/main/java/com/mindspore/lite/Model.java
@@ -51,21 +51,21 @@ public class Model {
             ret = this.modelPtr != 0;
         } catch (IOException e) {
             this.modelPtr = 0;
-            Log.e("MS_LITE", "Load model failed: " + e.getMessage());
+            Log.e("MS_LITE", "Load model failed");
             ret = false;
         } finally {
             if (null != fis) {
                 try {
                     fis.close();
                 } catch (IOException e) {
-                    Log.e("MS_LITE", "Close file failed: " + e.getMessage());
+                    Log.e("MS_LITE", "Close file failed");
                 }
             }
             if (null != fileDescriptor) {
                 try {
                     fileDescriptor.close();
                 } catch (IOException e) {
-                    Log.e("MS_LITE", "Close fileDescriptor failed: " + e.getMessage());
+                    Log.e("MS_LITE", "Close fileDescriptor failed");
                 }
             }
         }
diff --git a/mindspore/lite/nnacl/fp32/matmul_fp32.c b/mindspore/lite/nnacl/fp32/matmul_fp32.c
index f05bed22c3..66846b9d82 100644
--- a/mindspore/lite/nnacl/fp32/matmul_fp32.c
+++ b/mindspore/lite/nnacl/fp32/matmul_fp32.c
@@ -24,9 +24,9 @@ void RowMajor2ColMajor(const float *src_ptr, float *dst_ptr, int row, int col) {
   }
 }
 
-void RowMajor2Row4Major(float *src_ptr, float *dst_ptr, int row, int col) {
+void RowMajor2Row4Major(const float *src_ptr, float *dst_ptr, int row, int col) {
   for (int r = 0; r < row; r++) {
-    float *src = src_ptr + r * col;
+    const float *src = src_ptr + r * col;
     for (int c = 0; c < col; c++) {
       int cd8 = c / 4;
       int cm8 = c % 4;
@@ -36,9 +36,9 @@ void RowMajor2Row4Major(float *src_ptr, float *dst_ptr, int row, int col) {
   return;
 }
 
-void RowMajor2Row8Major(float *src_ptr, float *dst_ptr, int row, int col) {
+void RowMajor2Row8Major(const float *src_ptr, float *dst_ptr, int row, int col) {
   for (int r = 0; r < row; r++) {
-    float *src = src_ptr + r * col;
+    const float *src = src_ptr + r * col;
     for (int c = 0; c < col; c++) {
       int cd8 = c / 8;
       int cm8 = c % 8;
@@ -48,9 +48,9 @@ void RowMajor2Row8Major(float *src_ptr, float *dst_ptr, int row, int col) {
   return;
 }
 
-void RowMajor2Row12Major(float *src_ptr, float *dst_ptr, int row, int col) {
+void RowMajor2Row12Major(const float *src_ptr, float *dst_ptr, int row, int col) {
   for (int r = 0; r < row; r++) {
-    float *src = src_ptr + r * col;
+    const float *src = src_ptr + r * col;
     for (int c = 0; c < col; c++) {
       int cd8 = c / C12NUM;
       int cm8 = c % C12NUM;
@@ -60,18 +60,18 @@ void RowMajor2Row12Major(float *src_ptr, float *dst_ptr, int row, int col) {
   return;
 }
 
-void RowMajor2Col12Major(float *src_ptr, float *dst_ptr, size_t row, size_t col) {
+void RowMajor2Col12Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col) {
   size_t row_up_12 = UP_ROUND(row, C12NUM);
   size_t row12 = row / C12NUM * C12NUM;
   size_t col4 = col / C4NUM * C4NUM;
-  float *src_r = src_ptr;
+  const float *src_r = src_ptr;
   float *dst_r = dst_ptr;
 
   size_t ri = 0;
   for (; ri < row12; ri += C12NUM) {
     size_t ci = 0;
     for (; ci < col4; ci += C4NUM) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C12NUM;
 
       /* 12x4 row-major to col-major */
@@ -255,7 +255,7 @@ void RowMajor2Col12Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
 #endif
     }
     for (; ci < col; ci++) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C12NUM;
       for (size_t i = 0; i < C12NUM; i++) {
         dst_c[i] = src_c[i * col];
@@ -282,7 +282,7 @@ void RowMajor2Col12Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
   return;
 }
 
-void RowMajor2Col8Major(float *src_ptr, float *dst_ptr, size_t row, size_t col) {
+void RowMajor2Col8Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col) {
   size_t row8 = row / C8NUM * C8NUM;
 #ifdef ENABLE_ARM64
   size_t col_skip = col / C8NUM * C8NUM;
@@ -291,14 +291,14 @@ void RowMajor2Col8Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
   size_t col_skip = col / C4NUM * C4NUM;
   int skip_size = C4NUM;
 #endif
-  float *src_r = src_ptr;
+  const float *src_r = src_ptr;
   float *dst_r = dst_ptr;
 
   size_t ri = 0;
   for (; ri < row8; ri += C8NUM) {
     size_t ci = 0;
     for (; ci < col_skip; ci += skip_size) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C8NUM;
 
 #ifdef ENABLE_ARM64
@@ -459,7 +459,7 @@ void RowMajor2Col8Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
 #endif
     }
     for (; ci < col; ci++) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C8NUM;
       for (size_t i = 0; i < C8NUM; i++) {
         dst_c[i] = src_c[i * col];
@@ -478,17 +478,17 @@ void RowMajor2Col8Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
   return;
 }
 
-void RowMajor2Col4Major(float *src_ptr, float *dst_ptr, size_t row, size_t col) {
+void RowMajor2Col4Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col) {
   size_t row8 = row / C4NUM * C4NUM;
   size_t col4 = col / C4NUM * C4NUM;
-  float *src_r = src_ptr;
+  const float *src_r = src_ptr;
   float *dst_r = dst_ptr;
 
   size_t ri = 0;
   for (; ri < row8; ri += C4NUM) {
     size_t ci = 0;
     for (; ci < col4; ci += C4NUM) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C4NUM;
 
       /* 4x4 row-major to col-major */
@@ -548,7 +548,7 @@ void RowMajor2Col4Major(float *src_ptr, float *dst_ptr, size_t row, size_t col)
 #endif
     }
     for (; ci < col; ci++) {
-      float *src_c = src_r + ci;
+      const float *src_c = src_r + ci;
       float *dst_c = dst_r + ci * C4NUM;
       for (size_t i = 0; i < C4NUM; i++) {
         dst_c[i] = src_c[i * col];
diff --git a/mindspore/lite/nnacl/fp32/matmul_fp32.h b/mindspore/lite/nnacl/fp32/matmul_fp32.h
index 07501f2014..ec78ed56b0 100644
--- a/mindspore/lite/nnacl/fp32/matmul_fp32.h
+++ b/mindspore/lite/nnacl/fp32/matmul_fp32.h
@@ -30,12 +30,12 @@ void MatMulOpt(const float *a, const float *b, float *c, const float *bias, ActT
                int col, size_t stride, int out_type);
 void MatVecMul(const float *a, const float *b, float *c, const float *bias, ActType act_type, int depth, int col);
 void RowMajor2ColMajor(const float *src_ptr, float *dst_ptr, int row, int col);
-void RowMajor2Row4Major(float *src_ptr, float *dst_ptr, int row, int col);
-void RowMajor2Row8Major(float *src_ptr, float *dst_ptr, int row, int col);
-void RowMajor2Row12Major(float *src_ptr, float *dst_ptr, int row, int col);
-void RowMajor2Col4Major(float *src_ptr, float *dst_ptr, size_t row, size_t col);
-void RowMajor2Col8Major(float *src_ptr, float *dst_ptr, size_t row, size_t col);
-void RowMajor2Col12Major(float *src_ptr, float *dst_ptr, size_t row, size_t col);
+void RowMajor2Row4Major(const float *src_ptr, float *dst_ptr, int row, int col);
+void RowMajor2Row8Major(const float *src_ptr, float *dst_ptr, int row, int col);
+void RowMajor2Row12Major(const float *src_ptr, float *dst_ptr, int row, int col);
+void RowMajor2Col4Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col);
+void RowMajor2Col8Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col);
+void RowMajor2Col12Major(const float *src_ptr, float *dst_ptr, size_t row, size_t col);
 #ifdef ENABLE_ARM64
 void MatmulFloatNeon64(const float *a, const float *b, float *c, const float *bias, int act_type, int depth, int row,
                        int col, size_t stride, size_t writeNhwc, size_t WriteWino);
diff --git a/mindspore/lite/src/ops/scatter_nd.cc b/mindspore/lite/src/ops/scatter_nd.cc
index c89162fb2d..0767d19a70 100644
--- a/mindspore/lite/src/ops/scatter_nd.cc
+++ b/mindspore/lite/src/ops/scatter_nd.cc
@@ -55,6 +55,10 @@ int ScatterND::InferShape(std::vector<Tensor *> inputs_, std::vector<Tensor *> o
     return RET_ERROR;
   }
   auto output = outputs_.front();
+  if (output == nullptr) {
+    MS_LOG(ERROR) << "output null pointer dereferencing.";
+    return RET_ERROR;
+  }
   output->set_data_type(update->data_type());
   output->set_format(update->format());
   if (!infer_flag()) {
diff --git a/mindspore/lite/src/runtime/kernel/arm/base/pooling_base.cc b/mindspore/lite/src/runtime/kernel/arm/base/pooling_base.cc
index f1e9a61da0..d816f4dadd 100644
--- a/mindspore/lite/src/runtime/kernel/arm/base/pooling_base.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/base/pooling_base.cc
@@ -37,6 +37,7 @@ int PoolingBaseCPUKernel::SetQuantParam() {
   }
   pooling_quant_arg_[0] = reinterpret_cast<QuantArg *>(malloc(sizeof(QuantArg)));
   if (pooling_quant_arg_[0] == nullptr) {
+    pooling_quant_arg_[1] = nullptr;
     MS_LOG(ERROR) << "malloc pooling_quant_arg[0] failed.";
     free(pooling_quant_arg_);
     pooling_quant_arg_ = nullptr;
@@ -45,10 +46,10 @@ int PoolingBaseCPUKernel::SetQuantParam() {
   pooling_quant_arg_[1] = reinterpret_cast<QuantArg *>(malloc(sizeof(QuantArg)));
   if (pooling_quant_arg_[1] == nullptr) {
     MS_LOG(ERROR) << "malloc pooling_quant_arg[1] failed.";
-    free(*pooling_quant_arg_);
+    free(pooling_quant_arg_[0]);
     free(pooling_quant_arg_);
+    pooling_quant_arg_[0] = nullptr;
     pooling_quant_arg_ = nullptr;
-    *this->pooling_quant_arg_ = nullptr;
     return RET_MEMORY_FAILED;
   }
   auto *input_tensor = in_tensors_.at(kInputIndex);
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.cc b/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.cc
index c1eed749e7..cdb3e95077 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.cc
@@ -118,7 +118,7 @@ int FullconnectionCPUKernel::Init() {
   return ReSize();
 }
 
-void FullconnectionCPUKernel::InitMatrixA(float *src_ptr, float *dst_ptr) {
+void FullconnectionCPUKernel::InitMatrixA(const float *src_ptr, float *dst_ptr) {
   if (is_vector_input_) {
     memcpy(dst_ptr, src_ptr, fc_param_->deep_ * sizeof(float));
     return;
@@ -131,7 +131,7 @@ void FullconnectionCPUKernel::InitMatrixA(float *src_ptr, float *dst_ptr) {
 #endif
 }
 
-void FullconnectionCPUKernel::InitMatrixB(float *src_ptr, float *dst_ptr) {
+void FullconnectionCPUKernel::InitMatrixB(const float *src_ptr, float *dst_ptr) {
   if (is_vector_input_) {
     memcpy(dst_ptr, src_ptr, fc_param_->col_ * fc_param_->deep_ * sizeof(float));
     return;
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.h b/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.h
index 7b08a9d968..8ebe1934d7 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.h
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/fullconnection_fp32.h
@@ -43,8 +43,8 @@ class FullconnectionCPUKernel : public FullconnectionBaseCPUKernel {
   void FreeBuf();
 
  private:
-  void InitMatrixA(float *src_ptr, float *dst_ptr);
-  void InitMatrixB(float *src_ptr, float *dst_ptr);
+  void InitMatrixA(const float *src_ptr, float *dst_ptr);
+  void InitMatrixB(const float *src_ptr, float *dst_ptr);
 
  private:
   float *a_pack_ptr_ = nullptr;
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.cc b/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.cc
index f8a103bb4c..c1cfd09545 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.cc
@@ -167,14 +167,14 @@ int MatmulCPUKernel::ReSize() {
   return RET_OK;
 }
 
-void MatmulCPUKernel::InitMatrixA(float *src_ptr, float *dst_ptr) {
+void MatmulCPUKernel::InitMatrixA(const float *src_ptr, float *dst_ptr) {
   if (is_vector_a_) {
     memcpy(dst_ptr, src_ptr, params_->batch * params_->deep_ * sizeof(float));
     return;
   }
 
   for (int i = 0; i < params_->batch; i++) {
-    float *src = src_ptr + i * params_->deep_ * params_->row_;
+    const float *src = src_ptr + i * params_->deep_ * params_->row_;
 #if defined(ENABLE_ARM32) || defined(ENABLE_X86_64_SSE)
     float *dst = dst_ptr + i * params_->deep_ * params_->row_4_;
     if (params_->a_transpose_) {
@@ -194,13 +194,13 @@ void MatmulCPUKernel::InitMatrixA(float *src_ptr, float *dst_ptr) {
   return;
 }
 
-void MatmulCPUKernel::InitMatrixB(float *src_ptr, float *dst_ptr) {
+void MatmulCPUKernel::InitMatrixB(const float *src_ptr, float *dst_ptr) {
   if (is_vector_a_) {
     if (params_->b_transpose_) {
       memcpy(dst_ptr, src_ptr, params_->batch * params_->col_ * params_->deep_ * sizeof(float));
     } else {
       for (int i = 0; i < params_->batch; i++) {
-        float *src = src_ptr + i * params_->deep_ * params_->col_;
+        const float *src = src_ptr + i * params_->deep_ * params_->col_;
         float *dst = dst_ptr + i * params_->deep_ * params_->col_;
         RowMajor2ColMajor(src, dst, params_->deep_, params_->col_);
       }
@@ -209,7 +209,7 @@ void MatmulCPUKernel::InitMatrixB(float *src_ptr, float *dst_ptr) {
   }
 
   for (int i = 0; i < params_->batch; i++) {
-    float *src = src_ptr + i * params_->deep_ * params_->col_;
+    const float *src = src_ptr + i * params_->deep_ * params_->col_;
     float *dst = dst_ptr + i * params_->deep_ * params_->col_8_;
     if (params_->b_transpose_) {
       RowMajor2Col8Major(src, dst, params_->col_, params_->deep_);
diff --git a/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.h b/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.h
index f48e53d608..590e943e38 100644
--- a/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.h
+++ b/mindspore/lite/src/runtime/kernel/arm/fp32/matmul_fp32.h
@@ -40,8 +40,8 @@ class MatmulCPUKernel : public MatmulBaseCPUKernel {
   int MallocMatrixABuffer();
   int MallocMatrixBBuffer();
   int InitBias();
-  void InitMatrixA(float *src_ptr, float *dst_ptr);
-  void InitMatrixB(float *src_ptr, float *dst_ptr);
+  void InitMatrixA(const float *src_ptr, float *dst_ptr);
+  void InitMatrixB(const float *src_ptr, float *dst_ptr);
   void FreeTmpBuffer();
 
  private:
diff --git a/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.cc b/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.cc
index dda5957e87..60e3679c4a 100644
--- a/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.cc
@@ -152,10 +152,11 @@ void Convolution1x1Int8CPUKernel::CheckSupportOptimize() {
   return;
 }
 
-int Convolution1x1Int8CPUKernel::InitBiasByzp(void *src_weight, int input_channel, int output_channel, int round_oc) {
+int Convolution1x1Int8CPUKernel::InitBiasByzp(const void *src_weight, int input_channel, int output_channel,
+                                              int round_oc) {
   /* bias = bias - v2 x zp1 + zp1 x zp2  */
   int32_t *bias_data = reinterpret_cast<int32_t *>(bias_data_);
-  int8_t *weight = reinterpret_cast<int8_t *>(src_weight);
+  auto *weight = static_cast<const int8_t *>(src_weight);
   int32_t input_zp = conv_param_->conv_quant_arg_.input_quant_args_[0].zp_;
   for (int oc = 0; oc < output_channel; oc++) {
     int32_t weight_sum_value = 0;
diff --git a/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.h b/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.h
index 3eda1e9e7a..7ebe3d5b88 100644
--- a/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.h
+++ b/mindspore/lite/src/runtime/kernel/arm/int8/convolution_1x1_int8.h
@@ -62,7 +62,7 @@ class Convolution1x1Int8CPUKernel : public ConvolutionBaseCPUKernel {
   int InitWeightBiasArm32();
   void Pre1x1Trans(int8_t *src_input, int8_t *src_output);
   void CheckSupportOptimize();
-  int InitBiasByzp(void *src_weight, int input_channel, int output_channel, int round_oc);
+  int InitBiasByzp(const void *src_weight, int input_channel, int output_channel, int round_oc);
 
  private:
   int32_t *input_sum_ = nullptr;     /* per-oc */
diff --git a/mindspore/lite/src/runtime/kernel/arm/string/normalize.cc b/mindspore/lite/src/runtime/kernel/arm/string/normalize.cc
index 159a22345b..cff856ba8f 100644
--- a/mindspore/lite/src/runtime/kernel/arm/string/normalize.cc
+++ b/mindspore/lite/src/runtime/kernel/arm/string/normalize.cc
@@ -50,6 +50,9 @@ int NormalizeCPUKernel::Init() {
 int NormalizeCPUKernel::ReSize() { return RET_OK; }
 
 std::string NormalizeCPUKernel::Trim(const std::string &str, const std::string &whitespace /*= " \t\n\v\f\r"*/) {
+  if (str.empty()) {
+    return "";
+  }
   auto begin = str.find_first_not_of(whitespace);
   auto end = str.find_last_not_of(whitespace);
   const auto range = end - begin + 1;
diff --git a/mindspore/lite/src/runtime/kernel/opencl/utils.cc b/mindspore/lite/src/runtime/kernel/opencl/utils.cc
index 6904c800f4..0d8f313b35 100644
--- a/mindspore/lite/src/runtime/kernel/opencl/utils.cc
+++ b/mindspore/lite/src/runtime/kernel/opencl/utils.cc
@@ -303,7 +303,7 @@ void PrintTensor(const lite::Tensor *tensor, MemType mem_type, int n, const std:
   printf("\n");
 
   if (!out_file.empty()) {
-    WriteToBin(out_file, data.data(), data.size());
+    (void)WriteToBin(out_file, data.data(), data.size());
   }
 }
 
diff --git a/mindspore/lite/src/runtime/thread_pool.c b/mindspore/lite/src/runtime/thread_pool.c
index 45b8d84b90..09e592c78b 100644
--- a/mindspore/lite/src/runtime/thread_pool.c
+++ b/mindspore/lite/src/runtime/thread_pool.c
@@ -121,7 +121,7 @@ void FreeThread(ThreadList *thread_list, Thread *thread) {
   sem_post(&thread->sem);
   while (true) {
     if (thread != NULL && !thread->is_running) {
-      sem_destroy(&thread->sem);
+      (void)sem_destroy(&thread->sem);
       free(thread);
       thread = NULL;
       break;
@@ -403,6 +403,7 @@ int SortCpuProcessor() {
   int err_code = SetArch(freq_set, gCoreNum);
   if (err_code != RET_TP_OK) {
     LOG_ERROR("set arch failed.");
+    return RET_TP_ERROR;
   }
   // sort core id by frequency into descending order
   for (int i = 0; i < gCoreNum; ++i) {
@@ -470,7 +471,7 @@ int SetAffinity(pthread_t thread_id, cpu_set_t *cpuSet) {
 #else
   int ret = pthread_setaffinity_np(thread_id, sizeof(cpu_set_t), cpuSet);
   if (ret != RET_TP_OK) {
-    LOG_ERROR("set thread: %lu to cpu failed", thread_id);
+    LOG_ERROR("set thread: %d to cpu failed", thread_id);
     return RET_TP_SYSTEM_ERROR;
   }
 #endif  // __APPLE__
@@ -803,8 +804,12 @@ ThreadPool *CreateThreadPool(int thread_num, int mode) {
   }
 #ifdef BIND_CORE
   if (run_once) {
-    SortCpuProcessor();
+    int ret = SortCpuProcessor();
     run_once = false;
+    if (ret != RET_TP_OK) {
+      LOG_ERROR("SortCpuProcessor failed");
+      return NULL;
+    }
   }
 #endif
   ThreadPool *thread_pool = (struct ThreadPool *)(malloc(sizeof(ThreadPool)));