panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x170521b]

goroutine 3033674 [running]:
panic({0x30c780, 0x25a18d0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0110856e8 sp=0xc011085628 pc=0x115259b
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc011085748 sp=0xc0110856e8 pc=0x116b47d
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:681 +0x3b fp=0xc011085768 sp=0xc011085748 pc=0x170521b
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc000469f40, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x346 fp=0xc011085870 sp=0xc011085768 pc=0x170d8e6
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc000469d60, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085978 sp=0xc011085870 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624c460, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085a80 sp=0xc011085978 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624c6e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085b88 sp=0xc011085a80 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624c960, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085c90 sp=0xc011085b88 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624caa0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085d98 sp=0xc011085c90 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624cbe0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085ea0 sp=0xc011085d98 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624ce60, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011085fa8 sp=0xc011085ea0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624cfa0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110860b0 sp=0xc011085fa8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624d220, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110861b8 sp=0xc0110860b0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624d4a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110862c0 sp=0xc0110861b8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624d5e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110863c8 sp=0xc0110862c0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624d720, 0xc010f785a0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110864d0 sp=0xc0110863c8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624d860, 0xc010f78460)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110865d8 sp=0xc0110864d0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624dae0, 0xc010f783c0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110866e0 sp=0xc0110865d8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624dc20, 0xc010f78320)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110867e8 sp=0xc0110866e0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc00624dea0, 0xc010f78280)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110868f0 sp=0xc0110867e8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc001fa0000, 0xc010f781e0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc0110869f8 sp=0xc0110868f0 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc001fa0280, 0xc010f78140)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011086b00 sp=0xc0110869f8 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc001fa0500, 0xc010f780a0)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011086c08 sp=0xc011086b00 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc01a7bc590, 0xc01a7bc5a0, 0xc000469cc0, 0xc010f78000)
	pkg/sentry/vfs/namespace.go:147 +0x43e fp=0xc011086d10 sp=0xc011086c08 pc=0x170d9de
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc000299360, {0x6f5d40, 0xc005751500}, 0xc000cf6600, 0xc000cc14d0, 0x100000000000000?, 0x1?, {0x6d9940, 0xc000299180})
	pkg/sentry/vfs/namespace.go:186 +0x4ed fp=0xc011086e68 sp=0xc011086d10 pc=0x170df6d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc005751500, 0xc0110873e8)
	pkg/sentry/kernel/task_clone.go:205 +0x1a65 fp=0xc0110873d0 sp=0xc011086e68 pc=0x1a5aa25
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x118d0ec?, 0x20000, 0x20000160, 0x20000180, 0x200001c0, 0x20000200)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc0110874c8 sp=0xc0110873d0 pc=0x1d0cd25
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc005751500?, 0xee4e?, {{0x20000}, {0x20000160}, {0x20000180}, {0x200001c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xf4 fp=0xc011087550 sp=0xc0110874c8 pc=0x1caf154
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc005751500, 0x38, {{0x20000}, {0x20000160}, {0x20000180}, {0x200001c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:142 +0xabf fp=0xc011087968 sp=0xc011087550 pc=0x1a9531f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc005751500, 0x1?, {{0x20000}, {0x20000160}, {0x20000180}, {0x200001c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:322 +0x8e fp=0xc011087a08 sp=0xc011087968 pc=0x1a9742e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc018bb53b0?, 0xc00e661b37?, {{0x20000}, {0x20000160}, {0x20000180}, {0x200001c0}, {0x20000200}, {0x20000200}})
	pkg/sentry/kernel/task_syscall.go:282 +0xc5 fp=0xc011087a80 sp=0xc011087a08 pc=0x1a96d25
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc005751500)
	pkg/sentry/kernel/task_syscall.go:257 +0x53b fp=0xc011087ba8 sp=0xc011087a80 pc=0x1a9683b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc005751500?, 0xc005751500)
	pkg/sentry/kernel/task_run.go:269 +0x22b4 fp=0xc011087e68 sp=0xc011087ba8 pc=0x1a7f114
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc005751500, 0xdc5e)
	pkg/sentry/kernel/task_run.go:98 +0x35b fp=0xc011087fb0 sp=0xc011087e68 pc=0x1a7c3fb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x48 fp=0xc011087fe0 sp=0xc011087fb0 pc=0x1a92a08
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc011087fe8 sp=0xc011087fe0 pc=0x118b481
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:395 +0x1da