diff --git a/chaosmeta-inject-operator/pkg/scopehandler/pod/handler.go b/chaosmeta-inject-operator/pkg/scopehandler/pod/handler.go
index 86bd280..274b6ff 100644
--- a/chaosmeta-inject-operator/pkg/scopehandler/pod/handler.go
+++ b/chaosmeta-inject-operator/pkg/scopehandler/pod/handler.go
@@ -137,8 +137,9 @@ func getPodObjectList(ctx context.Context, selectorUnit v1alpha1.SelectorUnit) (
 
 	var result = make([]model.AtomicObject, 0)
 	for _, pod := range podList {
-		for _, subObject := range pod.GetSubObjects() {
-			result = append(result, &subObject)
+		subObjects := pod.GetSubObjects()
+		for i, _ := range subObjects {
+			result = append(result, &subObjects[i])
 		}
 	}
 
diff --git a/chaosmeta-inject-operator/pkg/selector/selector.go b/chaosmeta-inject-operator/pkg/selector/selector.go
index 81b9429..f17b314 100644
--- a/chaosmeta-inject-operator/pkg/selector/selector.go
+++ b/chaosmeta-inject-operator/pkg/selector/selector.go
@@ -29,8 +29,9 @@ import (
 )
 
 const (
-	HostIPKey = ".status.hostIP"
-	PhaseKey  = ".status.phase"
+	HostIPKey       = ".status.hostIP"
+	PhaseKey        = ".status.phase"
+	containerRegFmt = "^(%s)$"
 )
 
 var (
@@ -227,7 +228,6 @@ func GetTargetContainers(containerReg string, status []corev1.ContainerStatus) (
 		return
 	}
 	containerReg = strings.ReplaceAll(containerReg, ",", "|")
-	reg := regexp.MustCompile(containerReg)
 	containers = []model.ContainerInfo{}
 	var targetContainerInfo corev1.ContainerStatus
 	// no container setting equals to firstcontainer setting
@@ -239,6 +239,7 @@ func GetTargetContainers(containerReg string, status []corev1.ContainerStatus) (
 		}
 		containers = append(containers, *info)
 	} else {
+		reg := regexp.MustCompile(fmt.Sprintf(containerRegFmt, containerReg))
 		for _, containerStatus := range status {
 			if reg.MatchString(containerStatus.Name) {
 				info, err := getContainerInfo(containerStatus)