WARNING: DATA RACE
Write at 0x00c012fa173d by goroutine 273849:
  encoding/binary.bigEndian.PutUint16()
      GOROOT/src/encoding/binary/binary.go:150 +0xb72
  gvisor.dev/gvisor/pkg/tcpip/header.IPv4.SetFlagsFragmentOffset()
      pkg/tcpip/header/ipv4.go:438 +0xace
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).deliverPacketLocally()
      pkg/tcpip/network/ipv4/ipv4.go:1288 +0xacd
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handleValidatedPacket()
      pkg/tcpip/network/ipv4/ipv4.go:1147 +0x95b
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).HandlePacket()
      pkg/tcpip/network/ipv4/ipv4.go:875 +0x6e9
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket()
      pkg/tcpip/stack/nic.go:758 +0x216
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:61 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/packetsocket.(*endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/packetsocket/packetsocket.go:47 +0x4d
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:61 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/ethernet/ethernet.go:82 +0x284
  gvisor.dev/gvisor/pkg/tcpip/link/veth.(*Endpoint).InjectInbound()
      pkg/tcpip/link/veth/veth.go:128 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/veth.NewPair.func1()
      pkg/tcpip/link/veth/veth.go:78 +0x89

Previous read at 0x00c012fa173d by goroutine 273854:
  encoding/binary.bigEndian.Uint16()
      GOROOT/src/encoding/binary/binary.go:143 +0x1ae
  gvisor.dev/gvisor/pkg/tcpip/header.IPv4.Flags()
      pkg/tcpip/header/ipv4.go:313 +0x13f
  gvisor.dev/gvisor/pkg/tcpip/header.IPv4.More()
      pkg/tcpip/header/ipv4.go:318 +0x207
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).deliverPacketLocally()
      pkg/tcpip/network/ipv4/ipv4.go:1220 +0x20b
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handleValidatedPacket()
      pkg/tcpip/network/ipv4/ipv4.go:1147 +0x95b
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).HandlePacket()
      pkg/tcpip/network/ipv4/ipv4.go:875 +0x6e9
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket()
      pkg/tcpip/stack/nic.go:758 +0x216
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:61 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/packetsocket.(*endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/packetsocket/packetsocket.go:47 +0x4d
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:61 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/ethernet/ethernet.go:82 +0x284
  gvisor.dev/gvisor/pkg/tcpip/link/veth.(*Endpoint).InjectInbound()
      pkg/tcpip/link/veth/veth.go:128 +0x98
  gvisor.dev/gvisor/pkg/tcpip/link/veth.NewPair.func1()
      pkg/tcpip/link/veth/veth.go:78 +0x89