注入 sidecar 出现空指针问题

[chuntaojun]

Describe the bug

2022-09-01T15:44:45.958088Z	info	inject/inject.go:402	Sidecar injection policy for bookinfo/details-v1-5498c86cf5-***** (actual name not yet known): namespacePolicy:enabled useDefault:true inject:false required:true sidecar.istio.io/proxyMemory:(unset) sidecar.istio.io/userVolume:(unset) sidecar.istio.io/userVolumeMount:(unset) traffic.sidecar.istio.io/includeInboundPorts:(unset) sidecar.istio.io/status:(unset) sidecar.istio.io/bootstrapOverride:(unset) sidecar.istio.io/statsInclusionSuffixes:(unset) readiness.status.sidecar.istio.io/initialDelaySeconds:(unset) traffic.sidecar.istio.io/excludeOutboundIPRanges:(unset) sidecar.istio.io/discoveryAddress:(unset) sidecar.istio.io/rewriteAppHTTPProbers:(unset) sidecar.istio.io/controlPlaneAuthPolicy:(unset) sidecar.istio.io/proxyImage:(unset) sidecar.istio.io/interceptionMode:(unset) sidecar.istio.io/statsInclusionPrefixes:(unset) sidecar.istio.io/enableCoreDump:(unset) traffic.sidecar.istio.io/includeOutboundIPRanges:(unset) sidecar.polarismesh.cn/inject:(unset) sidecar.istio.io/statsInclusionRegexps:(unset) status.sidecar.istio.io/port:(unset) readiness.status.sidecar.istio.io/periodSeconds:(unset) readiness.status.sidecar.istio.io/failureThreshold:(unset) traffic.sidecar.istio.io/excludeInboundPorts:(unset) traffic.sidecar.istio.io/excludeOutboundPorts:(unset) traffic.sidecar.istio.io/kubevirtInterfaces:(unset) sidecar.istio.io/proxyCPU:(unset) 
2022-09-01T15:44:45.959088Z	info	http/server.go:1802	http: panic serving 10.130.97.147:9218: assignment to entry in nil map
goroutine 1522 [running]:
net/http.(*conn).serve.func1()
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:1801 +0xb9
panic({0x171b240, 0x1b75d50})
	/opt/hostedtoolcache/go/1.17.1/x64/src/runtime/panic.go:1047 +0x266
github.com/polarismesh/polaris-controller/pkg/inject/pkg/kube/inject.InjectionData({0xc000420000, 0xf2a}, {0xc000235400, 0xaac}, {0xc000056800, 0x40}, 0xc000162780, 0xc00092d200, 0xc0006c1118, 0xc0006c1020, ...)
	/home/runner/work/polaris-controller/polaris-controller/pkg/inject/pkg/kube/inject/inject.go:466 +0x425
github.com/polarismesh/polaris-controller/pkg/inject/pkg/kube/inject.(*Webhook).injectV1(0xc0004e86c0, 0x10)
	/home/runner/work/polaris-controller/polaris-controller/pkg/inject/pkg/kube/inject/webhook.go:966 +0x891
github.com/polarismesh/polaris-controller/pkg/inject/pkg/kube/inject.(*Webhook).serveInject(0x800, {0x1bad5b0, 0xc000d002a0}, 0xc0009a4a00)
	/home/runner/work/polaris-controller/polaris-controller/pkg/inject/pkg/kube/inject/webhook.go:1050 +0x8df
net/http.HandlerFunc.ServeHTTP(0x16975e0, {0x1bad5b0, 0xc000d002a0}, 0xc000d002a0)
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:2046 +0x2f
net/http.(*ServeMux).ServeHTTP(0xc000fc5cbd, {0x1bad5b0, 0xc000d002a0}, 0xc0009a4a00)
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:2424 +0x149
net/http.serverHandler.ServeHTTP({0x1b9d9d0}, {0x1bad5b0, 0xc000d002a0}, 0xc0009a4a00)
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:2878 +0x43b
net/http.(*conn).serve(0xc000d4c780, {0x1bb8358, 0xc000012b70})
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:1929 +0xb08
created by net/http.(*Server).Serve
	/opt/hostedtoolcache/go/1.17.1/x64/src/net/http/server.go:3033 +0x4e8
2022-09-01T15:44:45.969062Z	info	controller/controller.go:596	Service bookinfo/productpage is polaris type, in queue
2022-09-01T15:44:45.969090Z	info	controller/controller.go:590	Endpoint bookinfo/productpage is polaris, in queue
2022-09-01T15:44:45.974239Z	info	inject/webhook.go:1005

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Expected behavior
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Environment

• Version: [e.g. v1.0.0]
• OS: [e.g. CentOS8]

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