diff --git a/source/tools/inject/taskctl/taskctl.sh b/source/tools/inject/taskctl/taskctl.sh
index eeee6130ab28023d3388e9cc973e3548d613f85f..e74bc03cfe2e76b40cb4674ed2e688d3cdaf68a9 100644
--- a/source/tools/inject/taskctl/taskctl.sh
+++ b/source/tools/inject/taskctl/taskctl.sh
@@ -24,7 +24,14 @@ while getopts 'p:t:edh' OPT; do
 			exit 0
 			;;
 		"p")
-			echo "pid $OPTARG" > /proc/sysak/task_ctl
+			
+                       if ps -p $OPTARG > /dev/null
+                       then
+                           echo "pid $OPTARG" > /proc/sysak/task_ctl
+                       else
+                           echo "The pid $OPTARG is not exists."
+                           exit 1
+                       fi
 			;;
 		"t")
 			echo "type $OPTARG" > /proc/sysak/task_ctl