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

goroutine 150 [running]:
panic({0xd5ea40, 0x1d6cdf0})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x400056cc20 sp=0x400056cb60 pc=0x4518c
runtime.panicmem()
	GOROOT/src/runtime/panic.go:260 +0x48 fp=0x400056cc40 sp=0x400056cc20 pc=0x43b08
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x214 fp=0x400056cc80 sp=0x400056cc40 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(0x4000148e60, {0x11b3e40, 0x4000576a80}, 0x40004cd500)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0x104 fp=0x400056cda0 sp=0x400056cc90 pc=0x78bee4
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0x4000148e60, {0x11b3e40, 0x4000576a80}, 0x40004cd500, 0x40003ea2a0, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xddc fp=0x400056d030 sp=0x400056cda0 pc=0x77fc0c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0x40007f6c00, {0x11b3e40, 0x4000576a80}, {0x40004de010, 0x2})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x220 fp=0x400056d0e0 sp=0x400056d030 pc=0x7911f0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0x4000644000?, {0x11b3e40?, 0x4000576a80?}, 0x2?, 0x4000194ab0, {0x40004de010, 0x2}, 0x4000194990?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0x150 fp=0x400056d160 sp=0x400056d0e0 pc=0x3d4280
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x400056d360?, {0x11b3e40, 0x4000576a80}, 0x4000644000, 0x4000194ab0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x2d0 fp=0x400056d210 sp=0x400056d160 pc=0x3d3de0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0x400056d2f8?, {0x11b3e40, 0x4000576a80}, 0x4000644000)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0xb4 fp=0x400056d250 sp=0x400056d210 pc=0x3d44a4
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0x4000148e60, {0x11b3e40, 0x4000576a80}, 0x4000644000, {0x20002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x41c fp=0x400056d4c0 sp=0x400056d250 pc=0x3d767c
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0x40006b4200?, {0x11b3e40?, 0x4000576a80?}, 0x4000644000?, {0x1dd1f98?, 0x0?, 0x0?})
	<autogenerated>:1 +0x30 fp=0x400056d500 sp=0x400056d4c0 pc=0x7a7ed0
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0x4000460580?, {0x11b3e40, 0x4000576a80}, 0x560c48?, 0x400056d7d8, 0x400056d770)
	pkg/sentry/vfs/vfs.go:460 +0x2ac fp=0x400056d720 sp=0x400056d500 pc=0x36cdac
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0x4000576a80, 0x4cd500?, 0x38?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x1c4 fp=0x400056d890 sp=0x400056d720 pc=0x6bcf64
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0x4000576a80?, 0x7?, {{0xffffffffffffff9c}, {0xde75e2138bc0}, {0x2}, {0x0}, {0xe6b8790764a0}, {0x73}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x5c fp=0x400056d8d0 sp=0x400056d890 pc=0x6bccec
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x4000576a80, 0x38, {{0xffffffffffffff9c}, {0xde75e2138bc0}, {0x2}, {0x0}, {0xe6b8790764a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:142 +0x678 fp=0x400056dc10 sp=0x400056d8d0 pc=0x5825d8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x4000576a80, 0x40006ba000?, {{0xffffffffffffff9c}, {0xde75e2138bc0}, {0x2}, {0x0}, {0xe6b8790764a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:322 +0x48 fp=0x400056dc70 sp=0x400056dc10 pc=0x5838b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4000768878?, 0x4000768878?, {{0xffffffffffffff9c}, {0xde75e2138bc0}, {0x2}, {0x0}, {0xe6b8790764a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:282 +0x7c fp=0x400056dcd0 sp=0x400056dc70 pc=0x5834bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x40006300d0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x330 fp=0x400056ddd0 sp=0x400056dcd0 pc=0x5831e0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x40004d0580?, 0x4000576a80)
	pkg/sentry/kernel/task_run.go:269 +0x116c fp=0x400056df20 sp=0x400056ddd0 pc=0x57638c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x4000576a80, 0xb)
	pkg/sentry/kernel/task_run.go:98 +0x250 fp=0x400056dfb0 sp=0x400056df20 pc=0x574b80
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2c fp=0x400056dfd0 sp=0x400056dfb0 pc=0x580d0c
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x400056dfd0 sp=0x400056dfd0 pc=0x7a5b4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xf8