From ec4c5bed5dfb8880a34480173f951cdc03c70ae5 Mon Sep 17 00:00:00 2001
From: Mike Dame <mdame@redhat.com>
Date: Mon, 10 Aug 2020 09:36:34 -0400
Subject: [PATCH] Add check for ownerref length in DuplicatePods strategy

This fixes a panic that occurs if a pod has no ownerrefs
later on in the strategy. If a pod has no ownerrefs, there's
nothing for us to do with it.
---
 pkg/descheduler/strategies/duplicates.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/descheduler/strategies/duplicates.go b/pkg/descheduler/strategies/duplicates.go
index d14582352..4d485e3c8 100644
--- a/pkg/descheduler/strategies/duplicates.go
+++ b/pkg/descheduler/strategies/duplicates.go
@@ -69,7 +69,7 @@ func RemoveDuplicatePods(
 		duplicateKeysMap := map[string][][]string{}
 		for _, pod := range pods {
 			ownerRefList := podutil.OwnerRef(pod)
-			if hasExcludedOwnerRefKind(ownerRefList, strategy) {
+			if hasExcludedOwnerRefKind(ownerRefList, strategy) || len(ownerRefList) == 0 {
 				continue
 			}
 			podContainerKeys := make([]string, 0, len(ownerRefList)*len(pod.Spec.Containers))