Observed a panic: "invalid memory address or nil pointer dereference"

I0801 06:35:38.203019       1 controller.go:182] Assigning key: ip-10-0-132-175.ec2.internal to node workqueue
E0801 06:35:38.567021       1 runtime.go:79] Observed a panic: "invalid memory address or nil pointer dereference" (runtime error: invalid memory address or nil pointer dereference)
goroutine 195 [running]:
k8s.io/apimachinery/pkg/util/runtime.logPanic({0x28103a0?, 0x47a6400})
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:75 +0x99
k8s.io/apimachinery/pkg/util/runtime.HandleCrash({0x0, 0x0, 0xc00088f260?})
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:49 +0x75
panic({0x28103a0, 0x47a6400})
	/usr/lib/golang/src/runtime/panic.go:884 +0x213
github.com/openshift/cloud-network-config-controller/pkg/cloudprovider.(*AWS).getSubnet(0xc000c05220, 0xc000d760b0)
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/cloudprovider/aws.go:266 +0x24a
github.com/openshift/cloud-network-config-controller/pkg/cloudprovider.(*AWS).GetNodeEgressIPConfiguration(0x0?, 0x31b8490?, {0x0, 0x0, 0x0})
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/cloudprovider/aws.go:200 +0x185
github.com/openshift/cloud-network-config-controller/pkg/controller/node.(*NodeController).SyncHandler(0xc000d526e0, {0xc00005d7e0, 0x1c})
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/controller/node/node_controller.go:129 +0x44f
github.com/openshift/cloud-network-config-controller/pkg/controller.(*CloudNetworkConfigController).processNextWorkItem.func1(0xc00071f740, {0x25ff720?, 0xc00088f260?})
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/controller/controller.go:152 +0x11c
github.com/openshift/cloud-network-config-controller/pkg/controller.(*CloudNetworkConfigController).processNextWorkItem(0xc00071f740)
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/controller/controller.go:162 +0x46
github.com/openshift/cloud-network-config-controller/pkg/controller.(*CloudNetworkConfigController).runWorker(...)
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/controller/controller.go:113
k8s.io/apimachinery/pkg/util/wait.BackoffUntil.func1(0x30?)
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:226 +0x3e
k8s.io/apimachinery/pkg/util/wait.BackoffUntil(0x0?, {0x318e140, 0xc0005aa1e0}, 0x1, 0xc0000c4ba0)
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:227 +0xb6
k8s.io/apimachinery/pkg/util/wait.JitterUntil(0x0?, 0x3b9aca00, 0x0, 0x0?, 0x0?)
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:204 +0x89
k8s.io/apimachinery/pkg/util/wait.Until(0x0?, 0x0?, 0x0?)
	/go/src/github.com/openshift/cloud-network-config-controller/vendor/k8s.io/apimachinery/pkg/util/wait/backoff.go:161 +0x25
created by github.com/openshift/cloud-network-config-controller/pkg/controller.(*CloudNetworkConfigController).Run
	/go/src/github.com/openshift/cloud-network-config-controller/pkg/controller/controller.go:99 +0x3aa
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=0x0 pc=0x236d14a]