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

goroutine 699424 [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(0xc420a800e0, 0xc420a800e8)
	pkg/sentry/kernel/fasync/fasync.go:60 +0xde
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc420118740, 0x1)
	pkg/waiter/waiter.go:190 +0xe1
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc42093c3a0)
	pkg/tcpip/transport/unix/unix.go:649 +0x74
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc4202280e0)
	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(0xc4201be460, 0xc420f71780)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc4201be460)
	pkg/sentry/socket/unix/unix.go:74 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc4201be460)
	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(0xc4203610e0, 0xc420f71878)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc4203610e0)
	pkg/sentry/fs/file.go:119 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*FDMap).NewFDAt(0xc420a5cd20, 0x4, 0xc420360f30, 0xc420f71900, 0xc420176910, 0x48b033, 0xc420f719d0)
	pkg/sentry/kernel/fd_map.go:205 +0x1c7
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Dup3(0xc420faa900, 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(0xc420faa900, 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(0xc420faa900, 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(0xc420faa900, 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(0xc420faa900, 0x21, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0xc4204e06a0, 0xc420f71c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420faa900, 0x2, 0xc420723440)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420faa900, 0x10b2b60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420faa900, 0x1cf5)
	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