panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xb55ec4]

goroutine 5396971 [running]:
panic({0x1192ea0, 0x1fad990})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc004a4ac40 sp=0xc004a4ab80 pc=0x436d7b
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc004a4aca0 sp=0xc004a4ac40 pc=0x44e3bd
gvisor.dev/gvisor/pkg/sentry/inet.(*Namespace).Stack(...)
	pkg/sentry/inet/namespace.go:108
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskNetDir(0xc0003d6e60, {0x159a380, 0xc0065cf500}, 0xc0062a6a80)
	pkg/sentry/fsimpl/proc/task_net.go:46 +0xc4 fp=0xc004a4ada8 sp=0xc004a4aca0 pc=0xb55ec4
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0xc0003d6e60, {0x159a380, 0xc0065cf500}, 0xc0062a6a80, 0xc0092561c0, 0x1, 0x0)
	pkg/sentry/fsimpl/proc/task.go:73 +0xcc5 fp=0xc004a4afa0 sp=0xc004a4ada8 pc=0xb49de5
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0xc00699e800, {0x159a380, 0xc0065cf500}, {0xc0066e8610, 0x3})
	pkg/sentry/fsimpl/proc/tasks.go:130 +0x231 fp=0xc004a4b048 sp=0xc004a4afa0 pc=0xb5bab1
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0xc006c20000?, {0x159a380?, 0xc0065cf500?}, 0x3?, 0xc001582bd0, {0xc0066e8610, 0x3}, 0xc001582b40?)
	pkg/sentry/fsimpl/kernfs/filesystem.go:131 +0x16c fp=0xc004a4b0c0 sp=0xc004a4b048 pc=0x7b87cc
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc004a4b2b8?, {0x159a380, 0xc0065cf500}, 0xc006c20000, 0xc001582bd0)
	pkg/sentry/fsimpl/kernfs/filesystem.go:75 +0x29f fp=0xc004a4b170 sp=0xc004a4b0c0 pc=0x7b839f
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc004a4b248?, {0x159a380, 0xc0065cf500}, 0xc006c20000)
	pkg/sentry/fsimpl/kernfs/filesystem.go:163 +0x85 fp=0xc004a4b1b0 sp=0xc004a4b170 pc=0x7b89a5
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).OpenAt(0xc0003d6e60, {0x159a380, 0xc0065cf500}, 0xc006c20000, {0x8002, 0x0, 0x0})
	pkg/sentry/fsimpl/kernfs/filesystem.go:486 +0x565 fp=0xc004a4b418 sp=0xc004a4b1b0 pc=0x7bbda5
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).OpenAt(0xc0002501e0?, {0x159a380?, 0xc0065cf500?}, 0xc006c20000?, {0x200caf0?, 0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc004a4b450 sp=0xc004a4b418 pc=0xb7354e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).OpenAt(0xc0001b6200?, {0x159a380, 0xc0065cf500}, 0xc00017a400?, 0xc004a4b770, 0xc004a4b708)
	pkg/sentry/vfs/vfs.go:460 +0x23d fp=0xc004a4b670 sp=0xc004a4b450 pc=0x7600fd
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.openat(0xc0065cf500, 0xf0946f88?, 0x0?, 0x2, 0x0)
	pkg/sentry/syscalls/linux/sys_file.go:112 +0x254 fp=0xc004a4b830 sp=0xc004a4b670 pc=0xa863d4
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Openat(0xc0065cf500?, 0xc6ae45?, {{0xffffff9c}, {0x7faf0322d030}, {0x2}, {0x0}, {0x0}, {0x7faf0322cd65}})
	pkg/sentry/syscalls/linux/sys_file.go:91 +0x2d fp=0xc004a4b868 sp=0xc004a4b830 pc=0xa860ed
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0065cf500, 0x101, {{0xffffff9c}, {0x7faf0322d030}, {0x2}, {0x0}, {0x0}, {0x7faf0322cd65}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc004a4bc58 sp=0xc004a4b868 pc=0x958b75
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0065cf500, 0x85?, {{0xffffff9c}, {0x7faf0322d030}, {0x2}, {0x0}, {0x0}, {0x7faf0322cd65}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc004a4bcb8 sp=0xc004a4bc58 pc=0x959daa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc004295800?, 0x4?, {{0xffffff9c}, {0x7faf0322d030}, {0x2}, {0x0}, {0x0}, {0x7faf0322cd65}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc004a4bd18 sp=0xc004a4bcb8 pc=0x959a85
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc008513520?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc004a4be10 sp=0xc004a4bd18 pc=0x9597f0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc008e4db00?, 0xc0065cf500)
	pkg/sentry/kernel/task_run.go:269 +0x101e fp=0xc004a4bf48 sp=0xc004a4be10 pc=0x94d8de
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0065cf500, 0x178c)
	pkg/sentry/kernel/task_run.go:98 +0x1f8 fp=0xc004a4bfc0 sp=0xc004a4bf48 pc=0x94c218
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:389 +0x2a fp=0xc004a4bfe0 sp=0xc004a4bfc0 pc=0x95736a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc004a4bfe8 sp=0xc004a4bfe0 pc=0x46d821
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:389 +0xef