panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x17689d3]

goroutine 1811710 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc00a45c088 sp=0xc00a45bfd8 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc00a45c0e8 sp=0xc00a45c088 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc00a45c108 sp=0xc00a45c0e8 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017b680, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc00a45c218 sp=0xc00a45c108 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017b400, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c328 sp=0xc00a45c218 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497360, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c438 sp=0xc00a45c328 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017bae0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c548 sp=0xc00a45c438 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00453e000, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c658 sp=0xc00a45c548 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017bc20, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c768 sp=0xc00a45c658 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00453e140, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c878 sp=0xc00a45c768 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc0047960a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45c988 sp=0xc00a45c878 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017be00, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ca98 sp=0xc00a45c988 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc006716000, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45cba8 sp=0xc00a45ca98 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc006716140, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ccb8 sp=0xc00a45cba8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc0067900a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45cdc8 sp=0xc00a45ccb8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad40a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ced8 sp=0xc00a45cdc8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad41e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45cfe8 sp=0xc00a45ced8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497680, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d0f8 sp=0xc00a45cfe8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497540, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d208 sp=0xc00a45d0f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc0004977c0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d318 sp=0xc00a45d208 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796e60, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d428 sp=0xc00a45d318 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796320, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d538 sp=0xc00a45d428 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad4320, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d648 sp=0xc00a45d538 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad4460, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d758 sp=0xc00a45d648 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad45a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d868 sp=0xc00a45d758 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796500, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45d978 sp=0xc00a45d868 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc006716280, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45da88 sp=0xc00a45d978 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad46e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45db98 sp=0xc00a45da88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc0047963c0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45dca8 sp=0xc00a45db98 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00b6ac0a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ddb8 sp=0xc00a45dca8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc0067165a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45dec8 sp=0xc00a45ddb8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00453e8c0, 0xc00adaac80)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45dfd8 sp=0xc00a45dec8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00453ea00, 0xc00adaab40)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e0e8 sp=0xc00a45dfd8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796780, 0xc00adaaaa0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e1f8 sp=0xc00a45e0e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796640, 0xc00adaaa00)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e308 sp=0xc00a45e1f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004ad4820, 0xc00adaa960)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e418 sp=0xc00a45e308 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00a86a1e0, 0xc00adaa8c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e528 sp=0xc00a45e418 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc004796be0, 0xc00adaa820)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e638 sp=0xc00a45e528 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497d60, 0xc00adaa780)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e748 sp=0xc00a45e638 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497ea0, 0xc00adaa6e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e858 sp=0xc00a45e748 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00a86a0a0, 0xc00adaa640)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45e968 sp=0xc00a45e858 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc000497900, 0xc00adaa5a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ea78 sp=0xc00a45e968 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00a86a320, 0xc00adaa500)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45eb88 sp=0xc00a45ea78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc00c51dc90, 0xc00c51dca0, 0xc00017a320, 0xc00adaa460)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a45ec98 sp=0xc00a45eb88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0006816e0, {0x6fec98, 0xc008241500}, 0xc003804120, 0xc003276180, 0xc00027e160?, 0x11e7c8c?, {0x6e27c0, 0xc000681500})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc00a45ede0 sp=0xc00a45ec98 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc008241500, 0xc00a45f368)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc00a45f348 sp=0xc00a45ede0 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x11e7c8c?, 0x40122000, 0x70, 0x0, 0x0, 0x0)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc00a45f448 sp=0xc00a45f348 pc=0x1d5c325
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc00a45f540?, 0x11e072e?, {{0x40122000}, {0x70}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc00a45f4d0 sp=0xc00a45f448 pc=0x1d008cf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc008241500, 0x38, {{0x40122000}, {0x70}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc00a45f908 sp=0xc00a45f4d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc008241500, 0x1?, {{0x40122000}, {0x70}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc00a45f9c0 sp=0xc00a45f908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc007ad83c0?, 0x11e9329?, {{0x40122000}, {0x70}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc00a45fa38 sp=0xc00a45f9c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc008241500)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc00a45fb70 sp=0xc00a45fa38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc008241500?, 0xc008241500)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc00a45fe60 sp=0xc00a45fb70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc008241500, 0xb1c5)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc00a45ffb0 sp=0xc00a45fe60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc00a45ffe0 sp=0xc00a45ffb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00a45ffe8 sp=0xc00a45ffe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1811813
	pkg/sentry/kernel/task_start.go:395 +0x1ce