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

goroutine 256081 [running]:
panic({0xd5ea40, 0x1d6cdf0})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x4002d9cc20 sp=0x4002d9cb60 pc=0x4518c
runtime.panicmem()
	GOROOT/src/runtime/panic.go:260 +0x48 fp=0x4002d9cc40 sp=0x4002d9cc20 pc=0x43b08
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x214 fp=0x4002d9cc80 sp=0x4002d9cc40 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(0x40560d2000, {0x11b3e40, 0x4005798a80}, 0x4000f1ca80)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0x104 fp=0x4002d9cda0 sp=0x4002d9cc90 pc=0x78bee4
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0x40560d2000, {0x11b3e40, 0x4005798a80}, 0x4000f1ca80, 0x40003ea770, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xddc fp=0x4002d9d030 sp=0x4002d9cda0 pc=0x77fc0c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0x4001445400, {0x11b3e40, 0x4005798a80}, {0x4049feab10, 0x4})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x220 fp=0x4002d9d0e0 sp=0x4002d9d030 pc=0x7911f0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0x400010a900?, {0x11b3e40?, 0x4005798a80?}, 0x4?, 0x4005c81710, {0x4049feab10, 0x4}, 0x4000527c20?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0x150 fp=0x4002d9d160 sp=0x4002d9d0e0 pc=0x3d4280
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x4002d9d360?, {0x11b3e40, 0x4005798a80}, 0x400010a900, 0x4005c81710)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x2d0 fp=0x4002d9d210 sp=0x4002d9d160 pc=0x3d3de0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0x4002d9d2f8?, {0x11b3e40, 0x4005798a80}, 0x400010a900)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0xb4 fp=0x4002d9d250 sp=0x4002d9d210 pc=0x3d44a4
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0x40560d2000, {0x11b3e40, 0x4005798a80}, 0x400010a900, {0x20002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x41c fp=0x4002d9d4c0 sp=0x4002d9d250 pc=0x3d767c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0x4000598c80?, {0x11b3e40?, 0x4005798a80?}, 0x400010a900?, {0x1dd1f98?, 0x0?, 0x0?})
	<autogenerated>:1 +0x30 fp=0x4002d9d500 sp=0x4002d9d4c0 pc=0x7a7ed0
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0x40755d9440?, {0x11b3e40, 0x4005798a80}, 0x4000de0420?, 0x4002d9d7d8, 0x4002d9d770)
	pkg/sentry/vfs/vfs.go:460 +0x2ac fp=0x4002d9d720 sp=0x4002d9d500 pc=0x36cdac
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0x4005798a80, 0xf1ca80?, 0x38?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x1c4 fp=0x4002d9d890 sp=0x4002d9d720 pc=0x6bcf64
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0x4005798a80?, 0x0?, {{0xffffffffffffff9c}, {0xee7c1dcf89f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808000}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x5c fp=0x4002d9d8d0 sp=0x4002d9d890 pc=0x6bccec
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x4005798a80, 0x38, {{0xffffffffffffff9c}, {0xee7c1dcf89f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808000}})
	pkg/sentry/kernel/task_syscall.go:142 +0x678 fp=0x4002d9dc10 sp=0x4002d9d8d0 pc=0x5825d8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x4005798a80, 0x53ef48?, {{0xffffffffffffff9c}, {0xee7c1dcf89f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808000}})
	pkg/sentry/kernel/task_syscall.go:322 +0x48 fp=0x4002d9dc70 sp=0x4002d9dc10 pc=0x5838b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4002d9dd28?, 0x53ef58?, {{0xffffffffffffff9c}, {0xee7c1dcf89f0}, {0x2}, {0x0}, {0x0}, {0x8080808080808000}})
	pkg/sentry/kernel/task_syscall.go:282 +0x7c fp=0x4002d9dcd0 sp=0x4002d9dc70 pc=0x5834bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x4071e16dd0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x330 fp=0x4002d9ddd0 sp=0x4002d9dcd0 pc=0x5831e0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x40024f2980?, 0x4005798a80)
	pkg/sentry/kernel/task_run.go:269 +0x116c fp=0x4002d9df20 sp=0x4002d9ddd0 pc=0x57638c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x4005798a80, 0x201b)
	pkg/sentry/kernel/task_run.go:98 +0x250 fp=0x4002d9dfb0 sp=0x4002d9df20 pc=0x574b80
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2c fp=0x4002d9dfd0 sp=0x4002d9dfb0 pc=0x580d0c
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x4002d9dfd0 sp=0x4002d9dfd0 pc=0x7a5b4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xf8