crio: panic: "reflect: slice index out of range" in reflect.Value.Index() occurred during concurrent ExecSync requests

Issue

• crio: panic: "reflect: slice index out of range" in reflect.Value.Index() occurred during concurrent ExecSync requests

• dmesg(1) output:

Jun 25 01:47:11 hostname.sample.co.fo crio[95322]: panic: reflect: slice index out of range
Jun 25 01:47:11 hostname.sample.co.fo crio[95322]: goroutine 497358374 [running]:

• Stack trace of goroutine 497358374

  #0  runtime.systemstack_switch at asm_amd64.s:363
  #1  0x000056376cb3c9bc in runtime.dopanic at panic.go:597
  #2  0x000056376cb3c5f5 in runtime.gopanic at panic.go:551
  #3  0x000056376cc90746 in encoding/json.(*encodeState).marshal.func1 at encode.go:293
  #4  0x000056376cb69d2d in runtime.call32 at asm_amd64.s:573
  #5  0x000056376cb3c45d in runtime.gopanic at panic.go:502
  #6  0x000056376cbd2b93 in reflect.Value.Index at value.go:894
  #7  0x000056376cc87702 in encoding/json.(*arrayEncoder).encode at encode.go:761
  #8  0x000056376cc913d6 in encoding/json.(*arrayEncoder).(encoding/json.encode)-fm at encode.go:768
  #9  0x000056376cc87473 in encoding/json.(*sliceEncoder).encode at encode.go:735
  #10 0x000056376cc91356 in encoding/json.(*sliceEncoder).(encoding/json.encode)-fm at encode.go:747
  #11 0x000056376cc865c7 in encoding/json.(*structEncoder).encode at encode.go:639
  #12 0x000056376cc91256 in encoding/json.(*structEncoder).(encoding/json.encode)-fm at encode.go:653
  #13 0x000056376cc879a5 in encoding/json.(*ptrEncoder).encode at encode.go:780
  #14 0x000056376cc91456 in encoding/json.(*ptrEncoder).(encoding/json.encode)-fm at encode.go:785
  #15 0x000056376cc843f4 in encoding/json.(*encodeState).reflectValue at encode.go:325
  #16 0x000056376cc840d7 in encoding/json.(*encodeState).marshal at encode.go:298
  #17 0x000056376cc83ae1 in encoding/json.Marshal at encode.go:161
  #18 0x000056376d16b019 in github.com/cri-o/cri-o/oci.PrepareProcessExec at oci.go:819
  #19 0x000056376d166aee in github.com/cri-o/cri-o/oci.(*Runtime).ExecSync at oci.go:424
  #20 0x000056376db31e61 in github.com/cri-o/cri-o/server.(*Server).ExecSync at container_execsync.go:40
  #21 0x000056376d08cef3 in github.com/cri-o/cri-o/vendor/k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2._RuntimeService_ExecSync_Handler at api.pb.go:4363
  #22 0x000056376d07853a in github.com/cri-o/cri-o/vendor/google.golang.org/grpc.(*Server).processUnaryRPC at server.go:843
  #23 0x000056376d07b70a in github.com/cri-o/cri-o/vendor/google.golang.org/grpc.(*Server).handleStream at server.go:1040
  #24 0x000056376d07d0a1 in github.com/cri-o/cri-o/vendor/google.golang.org/grpc.(*Server).serveStreams.func1.1 at server.go:589
  #25 0x000056376cb6c531 in runtime.goexit at asm_amd64.s:2361