panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x6f63ef]

goroutine 305619 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0)
	pkg/sentry/kernel/task_identity.go:27 +0x2f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc001240620, 0xc001240628)
	pkg/sentry/kernel/fasync/fasync.go:61 +0x6d
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc000949100, 0xc003b60001)
	pkg/waiter/waiter.go:190 +0xa1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc001c45ca0)
	pkg/tcpip/transport/unix/unix.go:653 +0x39
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc002be05b0)
	pkg/tcpip/transport/unix/connectioned.go:217 +0x1a5
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef.func1()
	pkg/sentry/socket/unix/unix.go:75 +0x33
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc000949200, 0xc0049228f0)
	pkg/refs/refcounter.go:295 +0x188
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc000949200)
	pkg/sentry/socket/unix/unix.go:74 +0x50
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc000949200)
	pkg/sentry/socket/unix/unix.go:83 +0x2b
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:125 +0x76
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc003cb2280, 0xc0049229b0)
	pkg/refs/refcounter.go:295 +0x188
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc003cb2280)
	pkg/sentry/fs/file.go:119 +0x50
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls.releaseState(0xc00678fb30, 0x1, 0x1)
	pkg/sentry/syscalls/polling.go:72 +0x7c
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls.Poll(0xc004b03600, 0xc000a544d8, 0x1, 0x1, 0xffffffffff85ee00, 0xffffffffff85ee00, 0x0, 0xca16e0, 0xc00011e4f0)
	pkg/sentry/syscalls/polling.go:117 +0x33f
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc004b03600, 0x20b2c000, 0x1, 0xffffffffff85ee00, 0xc004b03600, 0x0, 0xffffff01, 0x920208)
	pkg/sentry/syscalls/linux/sys_poll.go:70 +0x15c
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.poll(0xc004b03600, 0x20b2c000, 0x1, 0xffffffffff85ee00, 0xc000b54c48, 0xc003cb2100, 0xc00496cc08)
	pkg/sentry/syscalls/linux/sys_poll.go:291 +0x53
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Poll(0xc004b03600, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x412e47, 0xc000c01fa8, 0x8, ...)
	pkg/sentry/syscalls/linux/sys_poll.go:309 +0x4f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc004b03600, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0xc002b94780, 0xbd1b00, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x30a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc004b03600, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x69
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc004b03600, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x100020001, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x99
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc004b03600, 0x2, 0xc007b0e000)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc004b03600, 0xca1e60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xfda
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc004b03600, 0x6e5)
	pkg/sentry/kernel/task_run.go:95 +0x163
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:275 +0xfe