panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x6c3bac]

goroutine 170 [running]:
panic({0xc4eaa0, 0x1a5a610})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x4000892b70 sp=0x4000892ab0 pc=0x4534c
runtime.panicmem()
	GOROOT/src/runtime/panic.go:260 +0x48 fp=0x4000892b90 sp=0x4000892b70 pc=0x43cc8
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x214 fp=0x4000892bd0 sp=0x4000892b90 pc=0x5ca94
gvisor.dev/gvisor/pkg/sentry/inet.(*Namespace).Stack(...)
	pkg/sentry/inet/namespace.go:108
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskNetDir(0x40002e2e60, {0x106fc00, 0x400064aa80}, 0x4000704a80)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0xbc fp=0x4000892cf0 sp=0x4000892be0 pc=0x6c3bac
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0x40002e2e60, {0x106fc00, 0x400064aa80}, 0x4000704a80, 0x40002e8460, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xca0 fp=0x4000892f80 sp=0x4000892cf0 pc=0x6b90e0
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0x4000319000, {0x106fc00, 0x400064aa80}, {0x40004e2c10, 0x2})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x1bc fp=0x4000893030 sp=0x4000892f80 pc=0x6c88fc
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0x4000345b00?, {0x106fc00?, 0x400064aa80?}, 0x2?, 0x40004f6480, {0x40004e2c10, 0x2}, 0x40004f63f0?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0xfc fp=0x40008930b0 sp=0x4000893030 pc=0x38b80c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x40008932b8?, {0x106fc00, 0x400064aa80}, 0x4000345b00, 0x40004f6480)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x250 fp=0x4000893160 sp=0x40008930b0 pc=0x38b4c0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0x4000893248?, {0x106fc00, 0x400064aa80}, 0x4000345b00)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0x7c fp=0x40008931a0 sp=0x4000893160 pc=0x38b9ac
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0x40002e2e60, {0x106fc00, 0x400064aa80}, 0x4000345b00, {0x20002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x380 fp=0x4000893410 sp=0x40008931a0 pc=0x38e4d0
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0x40002e4580?, {0x106fc00?, 0x400064aa80?}, 0x4000345b00?, {0x1abf7b8?, 0x0?, 0x0?})
	<autogenerated>:1 +0x30 fp=0x4000893450 sp=0x4000893410 pc=0x6dd240
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0x400064aa80?, {0x106fc00, 0x400064aa80}, 0x104?, 0x4000893728, 0x40008936c0)
	pkg/sentry/vfs/vfs.go:460 +0x1d8 fp=0x4000893670 sp=0x4000893450 pc=0x336098
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0x400064aa80, 0x7b8220?, 0x75?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x178 fp=0x40008937e0 sp=0x4000893670 pc=0x60bea8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0x4000893a50?, 0x110?, {{0xffffffffffffff9c}, {0xe3267586dbc0}, {0x2}, {0x0}, {0xe7886ca414a0}, {0x73}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x30 fp=0x4000893820 sp=0x40008937e0 pc=0x60bca0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x400064aa80, 0x38, {{0xffffffffffffff9c}, {0xe3267586dbc0}, {0x2}, {0x0}, {0xe7886ca414a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:142 +0x5a0 fp=0x4000893c10 sp=0x4000893820 pc=0x4fed40
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x400064aa80, 0x0?, {{0xffffffffffffff9c}, {0xe3267586dbc0}, {0x2}, {0x0}, {0xe7886ca414a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:322 +0x3c fp=0x4000893c70 sp=0x4000893c10 pc=0x4ffc3c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4000893d58?, 0x7b5d44?, {{0xffffffffffffff9c}, {0xe3267586dbc0}, {0x2}, {0x0}, {0xe7886ca414a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:282 +0x58 fp=0x4000893cd0 sp=0x4000893c70 pc=0x4ff958
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x4000620340?)
	pkg/sentry/kernel/task_syscall.go:257 +0x284 fp=0x4000893dd0 sp=0x4000893cd0 pc=0x4ff704
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x40002ea880?, 0x400064aa80)
	pkg/sentry/kernel/task_run.go:269 +0xd70 fp=0x4000893f20 sp=0x4000893dd0 pc=0x4f4d80
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x400064aa80, 0xa)
	pkg/sentry/kernel/task_run.go:98 +0x1d4 fp=0x4000893fb0 sp=0x4000893f20 pc=0x4f39c4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2c fp=0x4000893fd0 sp=0x4000893fb0 pc=0x4fd7fc
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x4000893fd0 sp=0x4000893fd0 pc=0x7a774
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xe4