panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x78bee4]

goroutine 506342 [running]:
panic({0xd5ea40, 0x1d6cdf0})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x4001e92c20 sp=0x4001e92b60 pc=0x4518c
runtime.panicmem()
	GOROOT/src/runtime/panic.go:260 +0x48 fp=0x4001e92c40 sp=0x4001e92c20 pc=0x43b08
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x214 fp=0x4001e92c80 sp=0x4001e92c40 pc=0x5c8d4
gvisor.dev/gvisor/pkg/sentry/inet.(*Namespace).Stack(...)
	pkg/sentry/inet/namespace.go:108
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskNetDir(0x4000375c20, {0x11b3e40, 0x4006cff500}, 0x4001f00a80)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0x104 fp=0x4001e92da0 sp=0x4001e92c90 pc=0x78bee4
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0x4000375c20, {0x11b3e40, 0x4006cff500}, 0x4001f00a80, 0x40008dcd20, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xddc fp=0x4001e93030 sp=0x4001e92da0 pc=0x77fc0c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0x400672ec00, {0x11b3e40, 0x4006cff500}, {0x4002962710, 0x5})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x220 fp=0x4001e930e0 sp=0x4001e93030 pc=0x7911f0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0x4007134900?, {0x11b3e40?, 0x4006cff500?}, 0x5?, 0x400641d710, {0x4002962710, 0x5}, 0x400641d680?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0x150 fp=0x4001e93160 sp=0x4001e930e0 pc=0x3d4280
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x4001e93360?, {0x11b3e40, 0x4006cff500}, 0x4007134900, 0x400641d710)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x2d0 fp=0x4001e93210 sp=0x4001e93160 pc=0x3d3de0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0x4001e932f8?, {0x11b3e40, 0x4006cff500}, 0x4007134900)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0xb4 fp=0x4001e93250 sp=0x4001e93210 pc=0x3d44a4
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0x4000375c20, {0x11b3e40, 0x4006cff500}, 0x4007134900, {0x20002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x41c fp=0x4001e934c0 sp=0x4001e93250 pc=0x3d767c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0x4000702200?, {0x11b3e40?, 0x4006cff500?}, 0x4007134900?, {0x1dd1f98?, 0x0?, 0x0?})
	<autogenerated>:1 +0x30 fp=0x4001e93500 sp=0x4001e934c0 pc=0x7a7ed0
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0x40077c9780?, {0x11b3e40, 0x4006cff500}, 0x4004b13800?, 0x4001e937d8, 0x4001e93770)
	pkg/sentry/vfs/vfs.go:460 +0x2ac fp=0x4001e93720 sp=0x4001e93500 pc=0x36cdac
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0x4006cff500, 0x1?, 0x1?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x1c4 fp=0x4001e93890 sp=0x4001e93720 pc=0x6bcf64
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0x4006cff500?, 0x7?, {{0xffffffffffffff9c}, {0xe25b12efd9f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808080}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x5c fp=0x4001e938d0 sp=0x4001e93890 pc=0x6bccec
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x4006cff500, 0x38, {{0xffffffffffffff9c}, {0xe25b12efd9f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808080}})
	pkg/sentry/kernel/task_syscall.go:142 +0x678 fp=0x4001e93c10 sp=0x4001e938d0 pc=0x5825d8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x4006cff500, 0x53ef48?, {{0xffffffffffffff9c}, {0xe25b12efd9f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808080}})
	pkg/sentry/kernel/task_syscall.go:322 +0x48 fp=0x4001e93c70 sp=0x4001e93c10 pc=0x5838b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4001e93d28?, 0x53ef58?, {{0xffffffffffffff9c}, {0xe25b12efd9f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808080}})
	pkg/sentry/kernel/task_syscall.go:282 +0x7c fp=0x4001e93cd0 sp=0x4001e93c70 pc=0x5834bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x40008855f0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x330 fp=0x4001e93dd0 sp=0x4001e93cd0 pc=0x5831e0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x40076ab200?, 0x4006cff500)
	pkg/sentry/kernel/task_run.go:269 +0x116c fp=0x4001e93f20 sp=0x4001e93dd0 pc=0x57638c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x4006cff500, 0x36a9)
	pkg/sentry/kernel/task_run.go:98 +0x250 fp=0x4001e93fb0 sp=0x4001e93f20 pc=0x574b80
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2c fp=0x4001e93fd0 sp=0x4001e93fb0 pc=0x580d0c
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x4001e93fd0 sp=0x4001e93fd0 pc=0x7a5b4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xf8