panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x79baea]

goroutine 1454314 [running]:
panic({0x11638c0, 0x2a39390})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc002282bb0 sp=0xc002282af0 pc=0x436abb
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc002282c10 sp=0xc002282bb0 pc=0x44e0fd
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1151ca0?)
	pkg/sentry/vfs/mount.go:681 +0xa fp=0xc002282c18 sp=0xc002282c10 pc=0x79baea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc00081a820, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1b2 fp=0xc002282ce8 sp=0xc002282c18 pc=0x7a1472
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc00081a5a0, 0xc008b43180)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002282db8 sp=0xc002282ce8 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc001850780, 0xc008b430e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002282e88 sp=0xc002282db8 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc001850960, 0xc008b42fa0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002282f58 sp=0xc002282e88 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc0077e6640, 0xc008b43040)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002283028 sp=0xc002282f58 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc0008d8d20, 0xc008b42f00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022830f8 sp=0xc002283028 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc002166f00, 0xc008b42e60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022831c8 sp=0xc0022830f8 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc008b42780, 0xc008b42dc0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002283298 sp=0xc0022831c8 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0068d1c90, 0xc0068d1ca0, 0xc00081a500, 0xc008b428c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002283368 sp=0xc002283298 pc=0x7a153a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc000438c60, {0x153d540, 0xc004c08a80}, 0xc0007d6360, 0xc0007ea4b0, 0x0?, 0x0?, {0x1521220, 0xc000438a80})
	pkg/sentry/vfs/namespace.go:186 +0x285 fp=0xc002283430 sp=0xc002283368 pc=0x7a1845
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc004c08a80, 0xc002283818)
	pkg/sentry/kernel/task_clone.go:205 +0xf3c fp=0xc002283808 sp=0xc002283430 pc=0x9b6efc
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x7ecde0800000?, 0x100000000d6db20?, 0xae00010101?, 0xfffffffffffbfeff?, 0x7ecde0600000?, 0x0?)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc0022838d8 sp=0xc002283808 pc=0xb7b77d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0x7ecde0601000?, 0x0?, {{0xc864000}, {0x20000e40}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x6e fp=0xc002283918 sp=0xc0022838d8 pc=0xb3a14e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc004c08a80, 0x38, {{0xc864000}, {0x20000e40}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc002283c58 sp=0xc002283918 pc=0x9db8cb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc004c08a80, 0xc0010ab3e0?, {{0xc864000}, {0x20000e40}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc002283cb8 sp=0xc002283c58 pc=0x9dceb4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00aa6be00?, 0xd7b0da?, {{0xc864000}, {0x20000e40}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc002283d18 sp=0xc002283cb8 pc=0x9dcaa5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0057cfd40?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc002283e10 sp=0xc002283d18 pc=0x9dc76c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc009a14f00?, 0xc004c08a80)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc002283f48 sp=0xc002283e10 pc=0x9ce1ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc004c08a80, 0x3c6b)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc002283fc0 sp=0xc002283f48 pc=0x9cc69c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x2a fp=0xc002283fe0 sp=0xc002283fc0 pc=0x9d9d4a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc002283fe8 sp=0xc002283fe0 pc=0x46d4c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:395 +0x105