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

goroutine 17185 [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(0xc420bd2000, 0xc420bd2008)
	pkg/sentry/kernel/fasync/fasync.go:60 +0xde
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc42010af80, 0x1)
	pkg/waiter/waiter.go:190 +0xe1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc4201b5d40)
	pkg/tcpip/transport/unix/unix.go:649 +0x74
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc42037caf0)
	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(0xc42048b0e0, 0xc420b03780)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc42048b0e0)
	pkg/sentry/socket/unix/unix.go:74 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc42048b0e0)
	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(0xc420d9e480, 0xc420b03878)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc420d9e480)
	pkg/sentry/fs/file.go:119 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).NewFDAt(0xc420cb12c0, 0x4, 0xc420d9e360, 0x0, 0xc4205a6110, 0x0, 0x7fffffff200df400)
	pkg/sentry/kernel/fd_map.go:205 +0x1c7
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc420df2900, 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(0xc420df2900, 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(0xc420df2900, 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(0xc420df2900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420df2900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x4571c9, 0x1)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420df2900, 0x2, 0xc42023d200)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420df2900, 0x10b2b60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420df2900, 0x14a)
	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