panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x79bc0a]

goroutine 3567800 [running]:
panic({0x1163940, 0x2a38c90})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc000c64e20 sp=0xc000c64d60 pc=0x436abb
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:260
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:837 +0x37d fp=0xc000c64e80 sp=0xc000c64e20 pc=0x44e0fd
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1151d20?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc000c64e88 sp=0xc000c64e80 pc=0x79bc0a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc000854640, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1b2 fp=0xc000c64f58 sp=0xc000c64e88 pc=0x7a1592
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc0008540a0, 0xc00af42320)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000c65028 sp=0xc000c64f58 pc=0x7a165a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc0005a6960, 0xc00af42280)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000c650f8 sp=0xc000c65028 pc=0x7a165a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc00af425a0, 0xc00af421e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000c651c8 sp=0xc000c650f8 pc=0x7a165a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc00af42dc0, 0xc00af420a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000c65298 sp=0xc000c651c8 pc=0x7a165a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc012b7ba10, 0xc012b7ba20, 0xc000854000, 0xc00af42000)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000c65368 sp=0xc000c65298 pc=0x7a165a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc000306c60, {0x153d5c0, 0xc00076d500}, 0xc000808ea0, 0xc0009b0510, 0x0?, 0x0?, {0x1521280, 0xc000306a80})
	pkg/sentry/vfs/namespace.go:186 +0x285 fp=0xc000c65430 sp=0xc000c65368 pc=0x7a1965
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00076d500, 0xc000c65818)
	pkg/sentry/kernel/task_clone.go:205 +0xf3c fp=0xc000c65808 sp=0xc000c65430 pc=0x9b701c
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x7ecc29400000?, 0x100000000b3e500?, 0x1ba00010101?, 0x153d5c0?, 0x7ecc29200000?, 0xc000a3d8e0?)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc000c658d8 sp=0xc000c65808 pc=0xb7b89d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0x7ecc29201000?, 0x0?, {{0x41024400}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x6e fp=0xc000c65918 sp=0xc000c658d8 pc=0xb3a26e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00076d500, 0x38, {{0x41024400}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc000c65c58 sp=0xc000c65918 pc=0x9db9eb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00076d500, 0xc01407d8c0?, {{0x41024400}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc000c65cb8 sp=0xc000c65c58 pc=0x9dcfd4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc008313e00?, 0xd7b1fa?, {{0x41024400}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc000c65d18 sp=0xc000c65cb8 pc=0x9dcbc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc013eda820?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc000c65e10 sp=0xc000c65d18 pc=0x9dc88c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc01af37880?, 0xc00076d500)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc000c65f48 sp=0xc000c65e10 pc=0x9ce30a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00076d500, 0x18c8)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc000c65fc0 sp=0xc000c65f48 pc=0x9cc7bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x2a fp=0xc000c65fe0 sp=0xc000c65fc0 pc=0x9d9e6a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc000c65fe8 sp=0xc000c65fe0 pc=0x46d4c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:395 +0x105