[Flake] unit test TestNewManagerImplStartProbeMode

[aojea]

Seen in #121445 (comment) and in #121407

No hits on https://storage.googleapis.com/k8s-triage/index.html?pr=1&test=TestNewManagerImplStartProbeMode

stack strace

E1023 13:40:22.589536   43369 goroutinemap.go:150] Operation for "/tmp/device_plugin1067413082/server.sock" failed. No retries permitted until 2023-10-23 13:40:23.0894569 +0000 UTC m=+0.753948700 (durationBeforeRetry 500ms). Error: RegisterPlugin error -- failed to get plugin info using RPC GetInfo at socket /tmp/device_plugin1067413082/server.sock, err: rpc error: code = Unimplemented desc = unknown service pluginregistration.Registration
--- FAIL: TestNewManagerImplStartProbeMode (0.01s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0x28fb0ac]

goroutine 238 [running]:
testing.tRunner.func1.2({0x2b14fa0, 0x452d660})
	/usr/local/go/src/testing/testing.go:1545 +0x366
testing.tRunner.func1()
	/usr/local/go/src/testing/testing.go:1548 +0x630
panic({0x2b14fa0?, 0x452d660?})
	/usr/local/go/src/runtime/panic.go:920 +0x270
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.(*ManagerImpl).PluginDisconnected(0xc00068fd40, {0xc000157470, 0x14})
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager.go:244 +0x46c
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1.(*client).Disconnect(0xc0000d7ae0)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1/client.go:106 +0x2d9
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1.(*server).disconnectClient(0xc000714270?, {0xc000157470, 0x14}, {0x3232508, 0xc0000d7ae0})
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1/handler.go:86 +0x55
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1.(*server).Stop.func1({0xc000157470, 0x14}, {0x3232508, 0xc0000d7ae0})
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1/server.go:120 +0x7a
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1.(*server).visitClients(0xc000374d90, 0xc000763d38)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1/server.go:186 +0x11f
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1.(*server).Stop(0xc000374d90)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1/server.go:119 +0x73
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.(*ManagerImpl).Stop(...)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager.go:315
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.cleanup(0x322a6f0?, {0x3251ca0, 0xc0006fb480}, 0x0?)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager_test.go:335 +0x42
k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.TestNewManagerImplStartProbeMode(0x0?)
	/home/prow/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager_test.go:119 +0x126
testing.tRunner(0xc0007081a0, 0x2ef5a08)
	/usr/local/go/src/testing/testing.go:1595 +0x239

nothing evident on the git history of the test itself, but it seems @pohly added it to detect races, so most probable something in the device manager has changed?

/sig node
/kind flake

[k8s-ci-robot]

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[wzshiming]

/assign

[pacoxu]

/cc @kubernetes/ci-signal
as this flakes a lot in https://testgrid.k8s.io/sig-release-master-blocking#ci-kubernetes-unit