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

goroutine 799887 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc004debe48 sp=0xc004debd98 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc004debea8 sp=0xc004debe48 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc004debec8 sp=0xc004debea8 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc0002190e0, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc004debfd8 sp=0xc004debec8 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc000218320, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec0e8 sp=0xc004debfd8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c000, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec1f8 sp=0xc004dec0e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c140, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec308 sp=0xc004dec1f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc000312d20, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec418 sp=0xc004dec308 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c280, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec528 sp=0xc004dec418 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00093e500, 0xc004ba7ea0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec638 sp=0xc004dec528 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c3c0, 0xc004ba7d60)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec748 sp=0xc004dec638 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c780, 0xc004ba7cc0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec858 sp=0xc004dec748 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c8c0, 0xc004ba7c20)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004dec968 sp=0xc004dec858 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476c640, 0xc004ba7b80)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004deca78 sp=0xc004dec968 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc00476ca00, 0xc004ba7ae0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004decb88 sp=0xc004deca78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc00504e850, 0xc00504e860, 0xc0002181e0, 0xc004ba7a40)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc004decc98 sp=0xc004decb88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0007ac560, {0x6fec98, 0xc0052a3500}, 0xc0038845a0, 0xc0027aa900, 0xba00000?, 0x101000101010101?, {0x6e27c0, 0xc0007ac380})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc004decde0 sp=0xc004decc98 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc0052a3500, 0xc004ded368)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc004ded348 sp=0xc004decde0 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x11e7c8c?, 0x9026000, 0x20000000, 0x0, 0x0, 0x0)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc004ded448 sp=0xc004ded348 pc=0x1d5c325
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc003caf540?, 0x11e072e?, {{0x9026000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc004ded4d0 sp=0xc004ded448 pc=0x1d008cf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0052a3500, 0x38, {{0x9026000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc004ded908 sp=0xc004ded4d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0052a3500, 0x1?, {{0x9026000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc004ded9c0 sp=0xc004ded908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00569bd10?, 0x11e9329?, {{0x9026000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc004deda38 sp=0xc004ded9c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0052a3500)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc004dedb70 sp=0xc004deda38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0052a3500?, 0xc0052a3500)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc004dede60 sp=0xc004dedb70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0052a3500, 0x4646)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc004dedfb0 sp=0xc004dede60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc004dedfe0 sp=0xc004dedfb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc004dedfe8 sp=0xc004dedfe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 799804
	pkg/sentry/kernel/task_start.go:395 +0x1ce