WARNING: DATA RACE
Write at 0x00c001ff451c by goroutine 2772:
  gvisor.dev/gvisor/pkg/sentry/socket/netstack/packetmmap.(*ringBuffer).init()
      pkg/sentry/socket/netstack/packetmmap/ring_buffer.go:62 +0x97
  gvisor.dev/gvisor/pkg/sentry/socket/netstack/packetmmap.(*Endpoint).Init()
      pkg/sentry/socket/netstack/packetmmap/endpoint.go:147 +0xae4
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.setSockOptPacket()
      pkg/sentry/socket/netstack/netstack.go:2974 +0x907
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.SetSockOpt()
      pkg/sentry/socket/netstack/netstack.go:1940 +0x365
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*sock).SetSockOpt()
      pkg/sentry/socket/netstack/netstack.go:672 +0x6a9
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux.SetSockOpt()
      pkg/sentry/syscalls/linux/sys_socket.go:551 +0x46b
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:143 +0xb9e
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:323 +0x84
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:283 +0xc6
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:258 +0x549
  gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:269 +0x2274
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:97 +0x41a
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
      pkg/sentry/kernel/task_start.go:412 +0x44

Previous read at 0x00c001ff451c by goroutine 2770:
  gvisor.dev/gvisor/pkg/sentry/socket/netstack/packetmmap.(*ringBuffer).internalMappingsForFrame()
      pkg/sentry/socket/netstack/packetmmap/ring_buffer.go:235 +0x18c
  gvisor.dev/gvisor/pkg/sentry/socket/netstack/packetmmap.(*ringBuffer).writeFrame()
      pkg/sentry/socket/netstack/packetmmap/ring_buffer.go:151 +0xad
  gvisor.dev/gvisor/pkg/sentry/socket/netstack/packetmmap.(*Endpoint).HandlePacket()
      pkg/sentry/socket/netstack/packetmmap/endpoint.go:288 +0xa15
  gvisor.dev/gvisor/pkg/tcpip/transport/packet.(*endpoint).HandlePacket()
      pkg/tcpip/transport/packet/endpoint.go:495 +0x161
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverLinkPacket.func2()
      pkg/tcpip/stack/nic.go:826 +0x391
  gvisor.dev/gvisor/pkg/tcpip/stack.(*packetEndpointList).forEach()
      pkg/tcpip/stack/nic.go:147 +0x142
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverLinkPacket()
      pkg/tcpip/stack/nic.go:841 +0x2e6
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writeRawPacket()
      pkg/tcpip/stack/nic.go:429 +0xb0
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writePacket()
      pkg/tcpip/stack/nic.go:414 +0x6a
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).WritePacket()
      pkg/tcpip/stack/nic.go:375 +0x22b
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).writePacketPostRouting()
      pkg/tcpip/network/ipv4/ipv4.go:608 +0x616
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).writePacket()
      pkg/tcpip/network/ipv4/ipv4.go:558 +0x2dd
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).WritePacket()
      pkg/tcpip/network/ipv4/ipv4.go:526 +0x244
  gvisor.dev/gvisor/pkg/tcpip/stack.(*Route).WritePacket()
      pkg/tcpip/stack/route.go:507 +0x172
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*protocol).returnError()
      pkg/tcpip/network/ipv4/icmp.go:801 +0xe75
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).deliverPacketLocally()
      pkg/tcpip/network/ipv4/ipv4.go:1359 +0x1104
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handleValidatedPacket()
      pkg/tcpip/network/ipv4/ipv4.go:1175 +0xeac
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).HandlePacket()
      pkg/tcpip/network/ipv4/ipv4.go:882 +0x5e9
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket()
      pkg/tcpip/stack/nic.go:785 +0x1ea
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:61 +0xc1
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/ethernet/ethernet.go:79 +0x329
  gvisor.dev/gvisor/pkg/tcpip/link/loopback.(*endpoint).WritePackets()
      pkg/tcpip/link/loopback/loopback.go:124 +0x1c9
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).WritePackets()
      pkg/tcpip/link/nested/nested.go:131 +0x78
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).WritePackets()
      <autogenerated>:1 +0x58
  gvisor.dev/gvisor/pkg/tcpip/stack.(*delegatingQueueingDiscipline).WritePacket()
      pkg/tcpip/stack/nic.go:164 +0xa2
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writeRawPacket()
      pkg/tcpip/stack/nic.go:432 +0xf6
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writePacket()
      pkg/tcpip/stack/nic.go:414 +0x6a
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).WritePacket()
      pkg/tcpip/stack/nic.go:375 +0x22b
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).writePacketPostRouting()
      pkg/tcpip/network/ipv4/ipv4.go:608 +0x616
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).writePacket()
      pkg/tcpip/network/ipv4/ipv4.go:558 +0x2dd
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).WritePacket()
      pkg/tcpip/network/ipv4/ipv4.go:526 +0x244
  gvisor.dev/gvisor/pkg/tcpip/stack.(*Route).WritePacket()
      pkg/tcpip/stack/route.go:507 +0x172
  gvisor.dev/gvisor/pkg/tcpip/transport/internal/network.(*WriteContext).WritePacket()
      pkg/tcpip/transport/internal/network/endpoint.go:359 +0x3ca
  gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).write()
      pkg/tcpip/transport/udp/endpoint.go:517 +0x593
  gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).Write()
      pkg/tcpip/transport/udp/endpoint.go:362 +0x91
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*sock).Write()
      pkg/sentry/socket/netstack/netstack.go:546 +0x4e5
  gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Write()
      pkg/sentry/vfs/file_description.go:682 +0x144
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux.write()
      pkg/sentry/syscalls/linux/sys_read_write.go:347 +0xa4
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Write()
      pkg/sentry/syscalls/linux/sys_read_write.go:316 +0x38e
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:143 +0xb9e
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:323 +0x84
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:283 +0xc6
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:258 +0x549
  gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:269 +0x2274
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:97 +0x41a
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
      pkg/sentry/kernel/task_start.go:412 +0x44