diff --git a/mindspore/ccsrc/device/ascend/ascend_kernel_runtime.cc b/mindspore/ccsrc/device/ascend/ascend_kernel_runtime.cc
index 44cf3f8fa87d749d5f12f287445185a63171dd48..10517299cc64a50b760aa28c60ddd9f2614e8243 100644
--- a/mindspore/ccsrc/device/ascend/ascend_kernel_runtime.cc
+++ b/mindspore/ccsrc/device/ascend/ascend_kernel_runtime.cc
@@ -453,25 +453,26 @@ bool AscendKernelRuntime::HcclInit() {
   }
 
   MS_LOG(INFO) << "do hcom init";
-  std::string path;
   const char *config_path_str = std::getenv("MINDSPORE_HCCL_CONFIG_PATH");
   if (config_path_str == nullptr) {
     MS_LOG(ERROR) << "get hccl json config failed, please set env MINDSPORE_HCCL_CONFIG_PATH";
     return false;
   }
-  path = config_path_str;
-  char fullPath[PATH_MAX] = {0};
-  if (path.size() > PATH_MAX || realpath(path.c_str(), fullPath) == nullptr) {
-    MS_LOG(ERROR) << "file " << path << " is not exist";
+  auto full_path = realpath(config_path_str, nullptr);
+  if (full_path == nullptr) {
+    MS_LOG(ERROR) << "file path " << config_path_str << " does not exist";
     return false;
   }
+
   const char *identify = std::getenv("RANK_ID");
   if (identify == nullptr) {
     MS_LOG(ERROR) << "get hccl rankid failed, please set env RANK_ID";
+    free(full_path);
     return false;
   }
-  MS_LOG(INFO) << "MINDSPORE_HCCL_CONFIG_PATH : " << fullPath << ", RANK_ID: " << identify;
-  hcclResult_t res = hcom_init(fullPath, identify);
+  MS_LOG(INFO) << "MINDSPORE_HCCL_CONFIG_PATH : " << full_path << ", RANK_ID: " << identify;
+  hcclResult_t res = hcom_init(full_path, identify);
+  free(full_path);
   if (res != HCCL_SUCCESS) {
     MS_LOG(ERROR) << "hcom init failed, res is " << static_cast<int>(res);
     return false;
diff --git a/mindspore/ccsrc/device/ascend/profiling/profiling_utils.cc b/mindspore/ccsrc/device/ascend/profiling/profiling_utils.cc
index fdfff96fde2d7e03c95cc9532a1954a4ab27a355..c1478915b7cdcf75340980a71d18c0fe4903664d 100644
--- a/mindspore/ccsrc/device/ascend/profiling/profiling_utils.cc
+++ b/mindspore/ccsrc/device/ascend/profiling/profiling_utils.cc
@@ -33,7 +33,7 @@ constexpr char kIterEndNode[] = "PROFILING_ITER_END";
 std::unordered_map<uint32_t, std::vector<std::string>> ProfilingUtils::graph_kernel_name_;
 uint32_t ProfilingUtils::custom_node_index_ = 1;
 
-ProfilingTraceInfo ProfilingUtils::GetProfilingTraceFromEnv(NotNull<session::KernelGraph *> graph_ptr) {
+ProfilingTraceInfo ProfilingUtils::GetProfilingTraceFromEnv(const NotNull<session::KernelGraph *> graph_ptr) {
   MS_LOG(INFO) << "get env start";
   custom_node_index_ = 1;
   auto &cnode_exec_order = graph_ptr->execution_order();
diff --git a/mindspore/ccsrc/device/ascend/profiling/profiling_utils.h b/mindspore/ccsrc/device/ascend/profiling/profiling_utils.h
index 1f7815b320adb504c2ad7b347ecf9828254293b1..99245b2c57f6793c1ee30fff27a0770cc24cedd3 100644
--- a/mindspore/ccsrc/device/ascend/profiling/profiling_utils.h
+++ b/mindspore/ccsrc/device/ascend/profiling/profiling_utils.h
@@ -94,7 +94,7 @@ class ProfilingUtils {
   // And other cnode, like AllReduce, export PROFILING_CUSTOM_1='full name of AllReduce cnode'
   // GetNext, export PROFIFLING_CUSTOM_2='full name fo GetNext cnode'
   // The variable i in PROFILING_CUSTOM_i should start from 1 without interruption.
-  static ProfilingTraceInfo GetProfilingTraceFromEnv(NotNull<session::KernelGraph *> graph_ptr);
+  static ProfilingTraceInfo GetProfilingTraceFromEnv(const NotNull<session::KernelGraph *> graph_ptr);
 
   // Insert two profiling trace points, one in front and one behind
   static void ProfilingCustomOp(const mindspore::AnfNodePtr &anf_node, const ProfilingTraceInfo &profiling_trace_info,
diff --git a/mindspore/ccsrc/device/ascend/tasksink/task_generator.cc b/mindspore/ccsrc/device/ascend/tasksink/task_generator.cc
index 62cf809c2191409e05e3b307aea715df6b6ed673..7b2a7dad9fb4cd7562f92938c7c3d2cad9c4ced6 100644
--- a/mindspore/ccsrc/device/ascend/tasksink/task_generator.cc
+++ b/mindspore/ccsrc/device/ascend/tasksink/task_generator.cc
@@ -121,8 +121,10 @@ bool TaskGenerator::LaunchKernel(const CNodePtr &anf_node_ptr, uint32_t stream_i
     LaunchAddrCleanKernel(anf_node_ptr, &kernel_inputs);
   }
 
-  std::vector<TaskInfoPtr> task_info_ptrs = dynamic_cast<kernel::AscendKernelMod *>(kernel_mod)
-                                              ->GenTask(kernel_inputs, kernel_workspaces, kernel_outputs, stream_id);
+  auto ascend_kernel_mod = dynamic_cast<kernel::AscendKernelMod *>(kernel_mod);
+  MS_EXCEPTION_IF_NULL(ascend_kernel_mod);
+  std::vector<TaskInfoPtr> task_info_ptrs =
+    ascend_kernel_mod->GenTask(kernel_inputs, kernel_workspaces, kernel_outputs, stream_id);
   task_info_list->insert(task_info_list->end(), task_info_ptrs.begin(), task_info_ptrs.end());
   return true;
 }
diff --git a/mindspore/ccsrc/kernel/hccl/hcom_util.cc b/mindspore/ccsrc/kernel/hccl/hcom_util.cc
index d1c0a30113e5e497806b91ae009ae844ca5301a9..5665475c847db6b5a85a54fc0cb56cd0b91d5328 100644
--- a/mindspore/ccsrc/kernel/hccl/hcom_util.cc
+++ b/mindspore/ccsrc/kernel/hccl/hcom_util.cc
@@ -136,7 +136,7 @@ bool HcomUtil::GetHcomCount(const AnfNodePtr &anf_node, const vector<hcclDataTyp
     }
   }
 
-  if (total_size % type_size != 0) {
+  if (type_size == 0 || total_size % type_size != 0) {
     MS_LOG(ERROR) << "Total_size[" << total_size << "],Type_size[" << type_size << "] != 0, fail!";
     return false;
   }