Multus mac-vlan/ipvlan/vlan cni panics when master interface in container is missing

metallb-operator.v4.13.0-202304190216   MetalLB Operator   4.13.0-202304190216 Succeeded

Create pod with multiple vlan interfaces connected to missing master interface.

1. Create pod with multiple vlan interfaces connected to missing master interface in container
2. Make sure that pod stuck in ContainerCreating state 
3. Run oc describe pod PODNAME and read crash message:

 Normal   Scheduled               22s   default-scheduler  Successfully assigned cni-tests/pod-one to worker-0
  Normal   AddedInterface          21s   multus             Add eth0 [10.128.2.231/23] from ovn-kubernetes
  Normal   AddedInterface          21s   multus             Add ext0 [] from cni-tests/tap-one
  Normal   AddedInterface          21s   multus             Add ext0.1 [2001:100::1/64] from cni-tests/mac-vlan-one
  Warning  FailedCreatePodSandBox  18s   kubelet            Failed to create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_pod-one_cni-tests_2e831519-effc-4502-8ea7-749eda95bf1d_0(321d7181626b8bbfad062dd7c7cc2ef096f8547e93cb7481a18b7d3613eabffd): error adding pod cni-tests_pod-one to CNI network "multus-cni-network": plugin type="multus" name="multus-cni-network" failed (add): [cni-tests/pod-one/2e831519-effc-4502-8ea7-749eda95bf1d:mac-vlan]: error adding container to network "mac-vlan": plugin type="macvlan" failed (add): netplugin failed: "panic: runtime error: invalid memory address or nil pointer dereference\n[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x54281a]\n\ngoroutine 1 [running, locked to thread]:\npanic({0x560b00, 0x6979d0})\n\t/usr/lib/golang/src/runtime/panic.go:987 +0x3ba fp=0xc0001ad8f0 sp=0xc0001ad830 pc=0x433d7a\nruntime.panicmem(...)\n\t/usr/lib/golang/src/runtime/panic.go:260\nruntime.sigpanic()\n\t/usr/lib/golang/src/runtime/signal_unix.go:835 +0x2f6 fp=0xc0001ad940 sp=0xc0001ad8f0 pc=0x449cd6\nmain.getMTUByName({0xc00001a978, 0x4}, {0xc00002004a, 0x33}, 0x1)\n\t/usr/src/plugins/plugins/main/macvlan/macvlan.go:167 +0x33a fp=0xc0001ada00 sp=0xc0001ad940 pc=0x54281a\nmain.loadConf(0xc000186770, {0xc00001e009, 0x19e})\n\t/usr/src/plugins/plugins/main/macvlan/macvlan.go:120 +0x155 fp=0xc0001ada80 sp=0xc0001ada00 pc=0x5422d5\nmain.cmdAdd(0xc000186770)\n\t/usr/src/plugins/plugins/main/macvlan/macvlan.go:287 +0x47 fp=0xc0001adcd0 sp=0xc0001ada80 pc=0x543b07\ngithub.com/containernetworking/cni/pkg/skel.(*dispatcher).checkVersionAndCall(0xc0000bdec8, 0xc000186770, {0x5c02b8, 0xc0000e4e40}, 0x592e80)\n\t/usr/src/plugins/vendor/github.com/containernetworking/cni/pkg/skel/skel.go:166 +0x20a fp=0xc0001add60 sp=0xc0001adcd0 pc=0x5371ca\ngithub.com/containernetworking/cni/pkg/skel.(*dispatcher).pluginMain(0xc0000bdec8, 0x698320?, 0xc0000bdeb0?, 0x44ed89?, {0x5c02b8, 0xc0000e4e40}, {0xc0000000f0, 0x22})\n\t/usr/src/plugins/vendor/github.com/containernetworking/cni/pkg/skel/skel.go:219 +0x2ca fp=0xc0001ade68 sp=0xc0001add60 pc=0x53772a\ngithub.com/containernetworking/cni/pkg/skel.PluginMainWithError(...)\n\t/usr/src/plugins/vendor/github.com/containernetworking/cni/pkg/skel/skel.go:273\ngithub.com/containernetworking/cni/pkg/skel.PluginMain(0x588e01?, 0x10?, 0xc0000bdf50?, {0x5c02b8?, 0xc0000e4e40?}, {0xc0000000f0?, 0x0?})\n\t/usr/src/plugins/vendor/github.com/containernetworking/cni/pkg/skel/skel.go:288 +0xd1 fp=0xc0001adf18 sp=0xc0001ade68 pc=0x537d51\nmain.main()\n\t/usr/src/plugins/plugins/main/macvlan/macvlan.go:432 +0xb6 fp=0xc0001adf80 sp=0xc0001adf18 pc=0x544b76\nruntime.main()\n\t/usr/lib/golang/src/runtime/proc.go:250 +0x212 fp=0xc0001adfe0 sp=0xc0001adf80 pc=0x436a12\nruntime.goexit()\n\t/usr/lib/golang/src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0001adfe8 sp=0xc0001adfe0 pc=0x462fc1\n\ngoroutine 2 [force gc (idle)]:\nruntime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)\n\t/usr/lib/golang/src/runtime/proc.go:363 +0xd6 fp=0xc0000acfb0 sp=0xc0000acf90 pc=0x436dd6\nruntime.goparkunlock(...)\n\t/usr/lib/golang/src/runtime/proc.go:369\nruntime.forcegchelper()\n\t/usr/lib/golang/src/runtime/proc.go:302 +0xad fp=0xc0000acfe0 sp=0xc0000acfb0 pc=0x436c6d\nruntime.goexit()\n\t/usr/lib/golang/src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0000acfe8 sp=0xc0000acfe0 pc=0x462fc1\ncreated by runtime.init.6\n\t/usr/lib/golang/src/runtime/proc.go:290 +0x25\n\ngoroutine 3 [GC sweep wait]:\nruntime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)\n\t/usr/lib/golang/src/runtime/proc.go:363 +0xd6 fp=0xc0000ad790 sp=0xc0000ad770 pc=0x436dd6\nruntime.goparkunlock(...)\n\t/usr/lib/golang/src/runtime/proc.go:369\nruntime.bgsweep(0x0?)\n\t/usr/lib/golang/src/runtime/mgcsweep.go:278 +0x8e fp=0xc0000ad7c8 sp=0xc0000ad790 pc=0x423e4e\nruntime.gcenable.func1()\n\t/usr/lib/golang/src/runtime/mgc.go:178 +0x26 fp=0xc0000ad7e0 sp=0xc0000ad7c8 pc=0x418d06\nruntime.goexit()\n\t/usr/lib/golang/src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0000ad7e8 sp=0xc0000ad7e0 pc=0x462fc1\ncreated by runtime.gcenable\n\t/usr/lib/golang/src/runtime/mgc.go:178 +0x6b\n\ngoroutine 4 [GC scavenge wait]:\nruntime.gopark(0xc0000ca000?, 0x5bf2b8?, 0x1?, 0x0?, 0x0?)\n\t/usr/lib/golang/src/runtime/proc.go:363 +0xd6 fp=0xc0000adf70 sp=0xc0000adf50 pc=0x436dd6\nruntime.goparkunlock(...)\n\t/usr/lib/golang/src/runtime/proc.go:369\nruntime.(*scavengerState).park(0x6a0920)\n\t/usr/lib/golang/src/runtime/mgcscavenge.go:389 +0x53 fp=0xc0000adfa0 sp=0xc0000adf70 pc=0x421ef3\nruntime.bgscavenge(0x0?)\n\t/usr/lib/golang/src/runtime/mgcscavenge.go:617 +0x45 fp=0xc0000adfc8 sp=0xc0000adfa0 pc=0x4224c5\nruntime.gcenable.func2()\n\t/usr/lib/golang/src/runtime/mgc.go:179 +0x26 fp=0xc0000adfe0 sp=0xc0000adfc8 pc=0x418ca6\nruntime.goexit()\n\t/usr/lib/golang/src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0000adfe8 sp=0xc0000adfe0 pc=0x462fc1\ncreated by runtime.gcenable\n\t/usr/lib/golang/src/runtime/mgc.go:179 +0xaa\n\ngoroutine 5 [finalizer wait]:\nruntime.gopark(0x0?, 0xc0000ac670?, 0xab?, 0x61?, 0xc0000ac770?)\n\t/usr/lib/golang/src/runtime/proc.go:363 +0xd6 fp=0xc0000ac628 sp=0xc0000ac608 pc=0x436dd6\nruntime.goparkunlock(...)\n\t/usr/lib/golang/src/runtime/proc.go:369\nruntime.runfinq()\n\t/usr/lib/golang/src/runtime/mfinal.go:180 +0x10f fp=0xc0000ac7e0 sp=0xc0000ac628 pc=0x417e0f\nruntime.goexit()\n\t/usr/lib/golang/src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0000ac7e8 sp=0xc0000ac7e0 pc=0x462fc1\ncreated by runtime.createfing\n\t/usr/lib/golang/src/runtime/mfinal.go:157 +0x45\n"

The readable error message should be provided instead.

We should handle such scenario without crash and The following log should be used instead. 

Error: Failed to create container due to the missing master interface XXX.