panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x889703]

goroutine 4432103 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_identity.go:25 +0x53
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc424169040, 0xc424169048)
	pkg/sentry/kernel/fasync/fasync.go:60 +0x119
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc42311fa00, 0x1)
	pkg/waiter/waiter.go:188 +0xe1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc4201fbcc0)
	pkg/tcpip/transport/unix/unix.go:640 +0x74
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc4236b48c0)
	pkg/tcpip/transport/unix/connectioned.go:215 +0x257
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef.func1()
	pkg/sentry/socket/unix/unix.go:73 +0x62
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc42145c0f0, 0xc421ff3780)
	pkg/refs/refcounter.go:293 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc42145c0f0)
	pkg/sentry/socket/unix/unix.go:72 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc42145c0f0)
	pkg/sentry/socket/unix/unix.go:81 +0x39
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:123 +0xe2
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4224162d0, 0xc421ff3878)
	pkg/refs/refcounter.go:293 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc4224162d0)
	pkg/sentry/fs/file.go:117 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).NewFDAt(0xc4204c7bc0, 0x4, 0xc422416120, 0xc421ff3900, 0xc420702660, 0x489e73, 0xc421ff39d0)
	pkg/sentry/kernel/fd_map.go:183 +0x1c7
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc42413a900, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:748 +0x180
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc42413a900, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:729 +0x1b3
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc42413a900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc42413a900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x3, 0x4)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc42413a900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0xc423f008e0, 0xc421ff3c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc42413a900, 0x2, 0xc4202d7320)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc42413a900, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc42413a900, 0xd991)
	pkg/sentry/kernel/task_run.go:95 +0x265
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x194