WARNING: DATA RACE
Write at 0x00c009eceb48 by goroutine 2956:
  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/transport/udp.(*endpoint).write()
      pkg/tcpip/transport/udp/endpoint.go:439 +0x31c
  gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).Write()
      pkg/tcpip/transport/udp/endpoint.go:332 +0x84
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*socketOpsCommon).SendMsg()
      pkg/sentry/socket/netstack/netstack.go:2931 +0x2d3
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketVFS2).SendMsg()
      <autogenerated>:1 +0x19d
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.sendSingleMsg()
      pkg/sentry/syscalls/linux/vfs2/socket.go:1064 +0x594
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.SendMMsg()
      pkg/sentry/syscalls/linux/vfs2/socket.go:988 +0x324
  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 0x00c009eceb48 by goroutine 2991:
  gvisor.dev/gvisor/pkg/tcpip/stack.(*PacketBuffer).Clone()
      pkg/tcpip/stack/packet_buffer.go:327 +0x93
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket.func1()
      pkg/tcpip/stack/nic.go:765 +0xca
  gvisor.dev/gvisor/pkg/tcpip/stack.(*packetEndpointList).forEach()
      pkg/tcpip/stack/nic.go:133 +0xf5
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket()
      pkg/tcpip/stack/nic.go:781 +0x477
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:59 +0xef
  gvisor.dev/gvisor/pkg/tcpip/link/sniffer.(*endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/sniffer/sniffer.go:140 +0xa4
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/nested/nested.go:59 +0xef
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).DeliverNetworkPacket()
      pkg/tcpip/link/ethernet/ethernet.go:63 +0x224
  gvisor.dev/gvisor/pkg/tcpip/link/loopback.(*endpoint).WriteRawPacket()
      pkg/tcpip/link/loopback/loopback.go:108 +0x1f5
  gvisor.dev/gvisor/pkg/tcpip/link/loopback.(*endpoint).WritePacket()
      pkg/tcpip/link/loopback/loopback.go:80 +0x45
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).WritePacket()
      pkg/tcpip/link/nested/nested.go:107 +0x1cc
  gvisor.dev/gvisor/pkg/tcpip/link/ethernet.(*Endpoint).WritePacket()
      pkg/tcpip/link/ethernet/ethernet.go:78 +0xd6
  gvisor.dev/gvisor/pkg/tcpip/link/nested.(*Endpoint).WritePacket()
      pkg/tcpip/link/nested/nested.go:107 +0x16c
  gvisor.dev/gvisor/pkg/tcpip/link/sniffer.(*endpoint).WritePacket()
      pkg/tcpip/link/sniffer/sniffer.go:169 +0x77
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writePacket()
      pkg/tcpip/stack/nic.go:382 +0x28c
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).writePacketBuffer()
      pkg/tcpip/stack/nic.go:326 +0x111
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).enqueuePacketBuffer()
      pkg/tcpip/stack/nic.go:341 +0x2dc
  gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).WritePacket()
      pkg/tcpip/stack/nic.go:319 +0x64
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).writePacket()
      pkg/tcpip/network/ipv4/ipv4.go:503 +0x58f
  gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).WritePacket()
      pkg/tcpip/network/ipv4/ipv4.go:453 +0x2bd
  gvisor.dev/gvisor/pkg/tcpip/stack.(*Route).WritePacket()
      pkg/tcpip/stack/route.go:462 +0x11b
  gvisor.dev/gvisor/pkg/tcpip/transport/internal/network.(*WriteContext).WritePacket()
      pkg/tcpip/transport/internal/network/endpoint.go:248 +0x19a
  gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).write()
      pkg/tcpip/transport/udp/endpoint.go:467 +0x544
  gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).Write()
      pkg/tcpip/transport/udp/endpoint.go:332 +0x84
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*socketOpsCommon).SendMsg()
      pkg/sentry/socket/netstack/netstack.go:2931 +0x2d3
  gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketVFS2).SendMsg()
      <autogenerated>:1 +0x19d
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.sendSingleMsg()
      pkg/sentry/syscalls/linux/vfs2/socket.go:1064 +0x594
  gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.SendMMsg()
      pkg/sentry/syscalls/linux/vfs2/socket.go:988 +0x324
  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