diff --git a/kerneldriver/core/analyze_unit/secDetector_save_check.c b/kerneldriver/core/analyze_unit/secDetector_save_check.c
index 788de3e5fca7f5b5f0ea462838ae9d892e5aa4d1..62d94d29fdafee66bbdfa2d24307bf3fd041c589 100644
--- a/kerneldriver/core/analyze_unit/secDetector_save_check.c
+++ b/kerneldriver/core/analyze_unit/secDetector_save_check.c
@@ -178,9 +178,10 @@ static int analyze_save_check_normal(struct list_head *collect_data_list, analyz
 
 end:
 	if (timestamp_len > 0) {
-		strncat(response_data->report_data.text, timestamp, timestamp_len);
+		if (response_data->report_data.text)
+			strncat(response_data->report_data.text, timestamp, timestamp_len);
 		kfree(timestamp);
-}
+	}
 	for (i = 0; i < response_array_index; i++)
 		kfree(response_arrays[i]);
 	kfree(response_arrays);