Change:
pkg/controller in I transformed that testcase into a fuzz driver and tested it with ]() It crash with "invalid memory address or nil pointer dereference" when some argument related data are fuzzed. Always No response No response Simplified PoC code is here: and it crashed as: /sig
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/kind cleanup /sig node /priority backlog This nil pointer is never reported by end users which means that before we call AddOrUpdateTaintOnNode, the node existence is checked. To make the code more stable, fixing it is valid. This would avoid future bugs if somewhere calls AddOrUpdateTaintOnNode without checking whether the node exists. I opened for this. /remove-kind failing-test (which means falling test ci )
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/remove-lifecycle stale
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Discussion:
taintsToAdd    []*v1.Taint expectedTaints []v1.Taint requestCount   int <ins> expectedErr    error </ins> }{ { name: "add one taint on node",

}, requestCount: 5, }, <ins> { name: "add taint to non-exist node", nodeHandler: &testutil.FakeNodeHandler{ Existing: []*v1.Node{ { ObjectMeta: metav1.ObjectMeta{ Name:            "node1", ResourceVersion: "1", }, Spec: v1.NodeSpec{ Taints: []v1.Taint{ {Key: "key1", Value: "value1", Effect: "NoSchedule"}, }, }, }, }, Clientset: fake.NewSimpleClientset(&v1.PodList{Items: []v1.Pod{*testutil.NewPod("pod0", "node0")}}), }, nodeName:    "node2", taintsToAdd: []*v1.Taint{{Key: "key2", Value: "value2", Effect: "NoExecute"}}, expectedErr: apierrors.NewNotFound(schema.GroupResource{Resource: "nodes"}, "node2"), }, </ins> } for _, test := range tests { err := AddOrUpdateTaintOnNode(context.TODO(), test.nodeHandler, test.nodeName, test.taintsToAdd...) <ins> if test.expectedErr != nil { assert.Equal(t, test.expectedErr, err, "AddOrUpdateTaintOnNode get unexpected error") continue } </ins> assert.NoError(t, err, "%s: AddOrUpdateTaintOnNode() error = %v", test.name, err) node, _ := test.nodeHandler.Get(context.TODO(), test.nodeName, metav1.GetOptions{})

return &nodeCopy, nil } } <del> return nil, nil </del> <ins> return nil, apierrors.NewNotFound(schema.GroupResource{Resource: "nodes"}, name) </ins> } func (m *FakeNodeHandler) runAsyncCalls() {