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

goroutine 2025264 [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(0xc420374a90, 0xc420374a98)
	pkg/sentry/kernel/fasync/fasync.go:60 +0x119
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc420dfc040, 0x1)
	pkg/waiter/waiter.go:188 +0xe1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc42084aee0)
	pkg/tcpip/transport/unix/unix.go:640 +0x74
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc4203103f0)
	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(0xc420b07130, 0xc4207b3618)
	pkg/refs/refcounter.go:293 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc420b07130)
	pkg/sentry/socket/unix/unix.go:72 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc420b07130)
	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(0xc42172f050, 0xc4207b3710)
	pkg/refs/refcounter.go:293 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc42172f050)
	pkg/sentry/fs/file.go:117 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls.releaseState(0xc4214760f0, 0x1, 0x1)
	pkg/sentry/syscalls/polling.go:72 +0xda
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls.Poll(0xc420746400, 0xc42100a000, 0x1, 0x1, 0xffffffffff85ee00, 0xffffffffff85ee00, 0x0, 0x10e3e40, 0xc4201304d0)
	pkg/sentry/syscalls/polling.go:117 +0x402
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc420746400, 0x20b2c000, 0x1, 0xffffffffff85ee00, 0x40000002, 0x0, 0xf44d, 0x0)
	pkg/sentry/syscalls/linux/sys_poll.go:70 +0x2b6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.poll(0xc420746400, 0x20b2c000, 0x1, 0xffffffffff85ee00, 0x46154c, 0x876bb8, 0xc42028a01c)
	pkg/sentry/syscalls/linux/sys_poll.go:289 +0x64
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Poll(0xc420746400, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x47b89e, 0xc4207b3a88, 0x42f404, ...)
	pkg/sentry/syscalls/linux/sys_poll.go:307 +0x61
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420746400, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420746400, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0x20b2c000, 0x1)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420746400, 0x7, 0x20b2c000, 0x1, 0xfffffffffffffff8, 0x0, 0x0, 0x0, 0xc42045ebe0, 0xc4207b3c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420746400, 0x2, 0xc420377680)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420746400, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420746400, 0x5097)
	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