WARNING: DATA RACE
Read at 0x00c420a4e3d0 by goroutine 462:
  gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify()
      pkg/waiter/waiter.go:187 +0xa4
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*queue).read()
      pkg/sentry/fs/tty/queue.go:150 +0x522
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*lineDiscipline).inputQueueRead()
      pkg/sentry/fs/tty/line_discipline.go:153 +0xf1
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*slaveFileOperations).Read()
      pkg/sentry/fs/tty/slave.go:125 +0xe7
  gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Readv()
      pkg/sentry/fs/file.go:230 +0x15b
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.readv()
      pkg/sentry/syscalls/linux/sys_read.go:191 +0xa1
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Readv()
      pkg/sentry/syscalls/linux/sys_read.go:144 +0x28c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:162 +0x14e
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:278 +0x7d
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:241 +0xc3
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:216 +0x19c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:217 +0x1501
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264

Previous write at 0x00c420a4e3d0 by goroutine 451:
  gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).EventRegister()
      pkg/waiter/waiter.go:169 +0x59
  gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty.(*masterFileOperations).EventRegister()
      pkg/sentry/fs/tty/master.go:124 +0xe1
  gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).EventRegister()
      pkg/sentry/fs/file.go:175 +0x6a
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll.(*EventPoll).initEntryReadiness()
      pkg/sentry/kernel/epoll/epoll.go:309 +0x11f
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel/epoll.(*EventPoll).AddEntry()
      pkg/sentry/kernel/epoll/epoll.go:392 +0x440
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls.AddEpoll()
      pkg/sentry/syscalls/epoll.go:67 +0x162
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.EpollCtl()
      pkg/sentry/syscalls/linux/sys_epoll.go:100 +0x252
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall()
      pkg/sentry/kernel/task_syscall.go:162 +0x14e
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke()
      pkg/sentry/kernel/task_syscall.go:278 +0x7d
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter()
      pkg/sentry/kernel/task_syscall.go:241 +0xc3
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall()
      pkg/sentry/kernel/task_syscall.go:216 +0x19c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute()
      pkg/sentry/kernel/task_run.go:217 +0x1501
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264