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

goroutine 3393261 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc001023f58 sp=0xc001023ea8 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc001023fb8 sp=0xc001023f58 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc001023fd8 sp=0xc001023fb8 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00059f7c0, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc0010240e8 sp=0xc001023fd8 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00059f540, 0xc0001a9ae0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc0010241f8 sp=0xc0010240e8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00059fc20, 0xc0001a9900)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024308 sp=0xc0010241f8 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00059fcc0, 0xc0001a9a40)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024418 sp=0xc001024308 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc001dc6140, 0xc0001a99a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024528 sp=0xc001024418 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00395e1e0, 0xc0001a9860)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024638 sp=0xc001024528 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc0009b43c0, 0xc0001a97c0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024748 sp=0xc001024638 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc0009b4320, 0xc0001a9720)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024858 sp=0xc001024748 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00395e6e0, 0xc0001a9680)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024968 sp=0xc001024858 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00395e640, 0xc0001a95e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024a78 sp=0xc001024968 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00395e780, 0xc0001a9540)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024b88 sp=0xc001024a78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc0070847d0, 0xc0070847e0, 0xc00059f4a0, 0xc0001a94a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc001024c98 sp=0xc001024b88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0004d96e0, {0x6fec98, 0xc013134a80}, 0xc000957f80, 0xc000e9d920, 0xc00a88e7e0?, 0xc000450990?, {0x6e27c0, 0xc0004d9500})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc001024de0 sp=0xc001024c98 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc013134a80, 0xc001025368)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc001025348 sp=0xc001024de0 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x11e7c8c?, 0xffffffff89e24000, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc001025448 sp=0xc001025348 pc=0x1d5c325
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc013134a80?, 0x117be34?, {{0x89e24000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc0010254d0 sp=0xc001025448 pc=0x1d008cf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc013134a80, 0x38, {{0x89e24000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc001025908 sp=0xc0010254d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc013134a80, 0x1?, {{0x89e24000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0010259c0 sp=0xc001025908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc014661c20?, 0x11e9329?, {{0x89e24000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc001025a38 sp=0xc0010259c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc013134a80)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc001025b70 sp=0xc001025a38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc013134a80?, 0xc013134a80)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc001025e60 sp=0xc001025b70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc013134a80, 0xc1e4)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc001025fb0 sp=0xc001025e60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc001025fe0 sp=0xc001025fb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc001025fe8 sp=0xc001025fe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 3394607
	pkg/sentry/kernel/task_start.go:395 +0x1ce