panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x86436d]

goroutine 4539101 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0)
	pkg/sentry/kernel/task_identity.go:27 +0x3d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc423d38620, 0xc423d38628)
	pkg/sentry/kernel/fasync/fasync.go:60 +0xde
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc420668dc0, 0x1)
	pkg/waiter/waiter.go:190 +0xe1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc4207494a0)
	pkg/tcpip/transport/unix/unix.go:649 +0x74
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc420af64d0)
	pkg/tcpip/transport/unix/connectioned.go:217 +0x257
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef.func1()
	pkg/sentry/socket/unix/unix.go:75 +0x62
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc420168ff0, 0xc423d69780)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc420168ff0)
	pkg/sentry/socket/unix/unix.go:74 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc420168ff0)
	pkg/sentry/socket/unix/unix.go:83 +0x39
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:125 +0xe2
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc424118ea0, 0xc423d69878)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc424118ea0)
	pkg/sentry/fs/file.go:119 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).NewFDAt(0xc42040f200, 0x4, 0xc424118ab0, 0xc423d69900, 0xc42075a310, 0x48b033, 0xc423d699d0)
	pkg/sentry/kernel/fd_map.go:205 +0x1c7
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc4239d0900, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:750 +0x180
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup2(0xc4239d0900, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:731 +0x1b3
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4239d0900, 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(0xc4239d0900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x3, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4239d0900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0xc420f2d1e0, 0xc423d69c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4239d0900, 0x2, 0xc420140ea0)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4239d0900, 0x10b2b60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4239d0900, 0x1537)
	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