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

goroutine 184 [running]:
panic({0xc4eaa0, 0x1a5a610})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x400066cb70 sp=0x400066cab0 pc=0x4534c
runtime.panicmem()
	GOROOT/src/runtime/panic.go:260 +0x48 fp=0x400066cb90 sp=0x400066cb70 pc=0x43cc8
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x214 fp=0x400066cbd0 sp=0x400066cb90 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(0x40001fb720, {0x106fc00, 0x40003f2a80}, 0x400064ca80)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0xbc fp=0x400066ccf0 sp=0x400066cbe0 pc=0x6c3bac
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0x40001fb720, {0x106fc00, 0x40003f2a80}, 0x400064ca80, 0x40002e8a80, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xca0 fp=0x400066cf80 sp=0x400066ccf0 pc=0x6b90e0
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0x40006ad400, {0x106fc00, 0x40003f2a80}, {0x400047c910, 0x2})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x1bc fp=0x400066d030 sp=0x400066cf80 pc=0x6c88fc
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0x40004b2480?, {0x106fc00?, 0x40003f2a80?}, 0x2?, 0x40005ca1b0, {0x400047c910, 0x2}, 0x40005ca120?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0xfc fp=0x400066d0b0 sp=0x400066d030 pc=0x38b80c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0x400066d2b8?, {0x106fc00, 0x40003f2a80}, 0x40004b2480, 0x40005ca1b0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x250 fp=0x400066d160 sp=0x400066d0b0 pc=0x38b4c0
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0x400066d248?, {0x106fc00, 0x40003f2a80}, 0x40004b2480)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0x7c fp=0x400066d1a0 sp=0x400066d160 pc=0x38b9ac
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0x40001fb720, {0x106fc00, 0x40003f2a80}, 0x40004b2480, {0x20002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x380 fp=0x400066d410 sp=0x400066d1a0 pc=0x38e4d0
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0x40002e2900?, {0x106fc00?, 0x40003f2a80?}, 0x40004b2480?, {0x1abf7b8?, 0x0?, 0x0?})
	<autogenerated>:1 +0x30 fp=0x400066d450 sp=0x400066d410 pc=0x6dd240
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0x40003f2a80?, {0x106fc00, 0x40003f2a80}, 0x7c7044?, 0x400066d728, 0x400066d6c0)
	pkg/sentry/vfs/vfs.go:460 +0x1d8 fp=0x400066d670 sp=0x400066d450 pc=0x336098
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0x40003f2a80, 0x64ca80?, 0x38?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x178 fp=0x400066d7e0 sp=0x400066d670 pc=0x60bea8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0x400066dc98?, 0x3d619c?, {{0xffffffffffffff9c}, {0xe08449127bc0}, {0x2}, {0x0}, {0xee85f4df34a0}, {0x73}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x30 fp=0x400066d820 sp=0x400066d7e0 pc=0x60bca0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x40003f2a80, 0x38, {{0xffffffffffffff9c}, {0xe08449127bc0}, {0x2}, {0x0}, {0xee85f4df34a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:142 +0x5a0 fp=0x400066dc10 sp=0x400066d820 pc=0x4fed40
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x40003f2a80, 0xe08449126000?, {{0xffffffffffffff9c}, {0xe08449127bc0}, {0x2}, {0x0}, {0xee85f4df34a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:322 +0x3c fp=0x400066dc70 sp=0x400066dc10 pc=0x4ffc3c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x2?, 0xe08449128000?, {{0xffffffffffffff9c}, {0xe08449127bc0}, {0x2}, {0x0}, {0xee85f4df34a0}, {0x73}})
	pkg/sentry/kernel/task_syscall.go:282 +0x58 fp=0x400066dcd0 sp=0x400066dc70 pc=0x4ff958
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x40003d4680?)
	pkg/sentry/kernel/task_syscall.go:257 +0x284 fp=0x400066ddd0 sp=0x400066dcd0 pc=0x4ff704
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x4000593e80?, 0x40003f2a80)
	pkg/sentry/kernel/task_run.go:269 +0xd70 fp=0x400066df20 sp=0x400066ddd0 pc=0x4f4d80
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x40003f2a80, 0xc)
	pkg/sentry/kernel/task_run.go:98 +0x1d4 fp=0x400066dfb0 sp=0x400066df20 pc=0x4f39c4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2c fp=0x400066dfd0 sp=0x400066dfb0 pc=0x4fd7fc
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x400066dfd0 sp=0x400066dfd0 pc=0x7a774
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xe4