syzbot

WARNING: DATA RACE
Read at 0x00c4a9beed18 by goroutine 422:
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Clone()
      pkg/sentry/kernel/task_clone.go:223 +0x459
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.clone()
      pkg/sentry/syscalls/linux/sys_thread.go:157 +0x22e
  gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Clone()
      pkg/sentry/syscalls/linux/sys_thread.go:171 +0x80
  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 +0x157c
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264

Previous write at 0x00c4a9beed18 by goroutine 350:
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).reparentLocked()
      pkg/sentry/kernel/task_exit.go:413 +0x61
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).exitChildren()
      pkg/sentry/kernel/task_exit.go:373 +0x220
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runExitMain).execute()
      pkg/sentry/kernel/task_exit.go:276 +0x1a8
  gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run()
      pkg/sentry/kernel/task_run.go:95 +0x264