WARNING: DATA RACE
Write at 0x00c0027af328 by goroutine 1453:
  gvisor.dev/gvisor/pkg/tcpip/stack.(*PacketBuffer).reset()
      pkg/tcpip/stack/packet_buffer.go:201 +0x78
  gvisor.dev/gvisor/pkg/tcpip/stack.NewPacketBuffer()
      pkg/tcpip/stack/packet_buffer.go:167 +0x66
  gvisor.dev/gvisor/pkg/tcpip/link/tun.(*Device).Write()
      pkg/tcpip/link/tun/device.go:231 +0x3d6
  gvisor.dev/gvisor/pkg/sentry/devices/tundev.(*tunFD).Write()
      pkg/sentry/devices/tundev/tundev.go:146 +0x236
  gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Write()
      pkg/sentry/vfs/file_description.go:657 +0x130
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.write()
      pkg/sentry/syscalls/linux/vfs2/read_write.go:345 +0xed
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Write()
      pkg/sentry/syscalls/linux/vfs2/read_write.go:314 +0x307
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:103 +0x452
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:238 +0xb3
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:198 +0x10e
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:173 +0x213
  gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:282 +0x12c6
  gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:97 +0x352

Previous read at 0x00c0027af328 by goroutine 1615:
  gvisor.dev/gvisor/pkg/tcpip/stack.(*PacketBuffer).Clone()
      pkg/tcpip/stack/packet_buffer.go:327 +0x93
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).deliverOutboundPacket.func1()
      pkg/tcpip/stack/nic.go:824 +0xd8
  gvisor.dev/gvisor/pkg/tcpip/stack.(*packetEndpointList).forEach()
      pkg/tcpip/stack/nic.go:133 +0xf5
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).deliverOutboundPacket()
      pkg/tcpip/stack/nic.go:802 +0x214
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writePacket()
      pkg/tcpip/stack/nic.go:380 +0x1c6
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).WritePacketToRemote()
      pkg/tcpip/stack/nic.go:371 +0xef
  gvisor.dev/gvisor/pkg/tcpip/network/ipv6.(*endpoint).sendNDPNS()
      pkg/tcpip/network/ipv6/ndp.go:1938 +0x594
  gvisor.dev/gvisor/pkg/tcpip/network/ipv6.(*endpoint).LinkAddressRequest()
      pkg/tcpip/network/ipv6/icmp.go:913 +0x376
  gvisor.dev/gvisor/pkg/tcpip/stack.(*neighborEntry).handlePacketQueuedLocked.func1()
      pkg/tcpip/stack/neighbor_entry.go:397 +0x51e
  gvisor.dev/gvisor/pkg/sentry/kernel/time.AfterFunc.func1.1()
      pkg/sentry/kernel/time/util.go:57 +0x42