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

goroutine 2231230 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc00a417e48 sp=0xc00a417d98 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc00a417ea8 sp=0xc00a417e48 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc00a417ec8 sp=0xc00a417ea8 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00037d4a0, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc00a417fd8 sp=0xc00a417ec8 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00037cbe0, 0xc00a58c8c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a4180e8 sp=0xc00a417fd8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00003d860, 0xc00a58c780)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a4181f8 sp=0xc00a4180e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00003d900, 0xc00a58c6e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418308 sp=0xc00a4181f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb20a0, 0xc00a58c640)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418418 sp=0xc00a418308 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb2000, 0xc00a58c5a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418528 sp=0xc00a418418 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb2280, 0xc00a58c500)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418638 sp=0xc00a418528 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb21e0, 0xc00a58c460)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418748 sp=0xc00a418638 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb2500, 0xc00a58c3c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418858 sp=0xc00a418748 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb26e0, 0xc00a58c280)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418968 sp=0xc00a418858 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb2640, 0xc00a58c320)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418a78 sp=0xc00a418968 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00ccb2960, 0xc00a58c1e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418b88 sp=0xc00a418a78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc0082ecd50, 0xc0082ecd60, 0xc00037ca00, 0xc00a58c140)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc00a418c98 sp=0xc00a418b88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc000717360, {0x6fec98, 0xc003db4a80}, 0xc00080d680, 0xc0009e6d50, 0x1358285?, 0x1e9815?, {0x6e27c0, 0xc000717180})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc00a418de0 sp=0xc00a418c98 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc003db4a80, 0xc00a419368)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc00a419348 sp=0xc00a418de0 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x11e7c8c?, 0xca60000, 0x20001480, 0x20000000, 0x200000c0, 0x20000200)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc00a419448 sp=0xc00a419348 pc=0x1d5c325
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc003db4a80?, 0x11e7c8c?, {{0xca60000}, {0x20001480}, {0x20000000}, {0x200000c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc00a4194d0 sp=0xc00a419448 pc=0x1d008cf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc003db4a80, 0x38, {{0xca60000}, {0x20001480}, {0x20000000}, {0x200000c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc00a419908 sp=0xc00a4194d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc003db4a80, 0x1?, {{0xca60000}, {0x20001480}, {0x20000000}, {0x200000c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc00a4199c0 sp=0xc00a419908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00d0030e0?, 0x11e9329?, {{0xca60000}, {0x20001480}, {0x20000000}, {0x200000c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc00a419a38 sp=0xc00a4199c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc003db4a80)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc00a419b70 sp=0xc00a419a38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc003db4a80?, 0xc003db4a80)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc00a419e60 sp=0xc00a419b70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc003db4a80, 0x7aac)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc00a419fb0 sp=0xc00a419e60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc00a419fe0 sp=0xc00a419fb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00a419fe8 sp=0xc00a419fe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 2231267
	pkg/sentry/kernel/task_start.go:395 +0x1ce