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

goroutine 572782 [running]:
panic({0x305940?, 0x25d0c60?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc008dec4a8 sp=0xc008dec3f8 pc=0x11ad0ec
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc008dec508 sp=0xc008dec4a8 pc=0x11c60f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0)
	pkg/sentry/vfs/mount.go:693 +0x33 fp=0xc008dec528 sp=0xc008dec508 pc=0x17689d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc000366e60, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x385 fp=0xc008dec638 sp=0xc008dec528 pc=0x1770d45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc000366be0, 0xc00dbe45a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008dec748 sp=0xc008dec638 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc00dbe4000, 0xc00dbe4460)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008dec858 sp=0xc008dec748 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc00de8a000, 0xc00dbe4500)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008dec968 sp=0xc008dec858 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc00dbe4320, 0xc00dbe41e0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008deca78 sp=0xc008dec968 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc00dbe4280, 0xc00dbe4140)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008decb88 sp=0xc008deca78 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc004f32250, 0xc004f32260, 0xc000366a00, 0xc00dbe40a0)
	pkg/sentry/vfs/namespace.go:147 +0x47e fp=0xc008decc98 sp=0xc008decb88 pc=0x1770e3e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0004d01e0, {0x6fec98, 0xc00e0f2000}, 0xc000bae420, 0xc00099e870, 0xc000d58e30?, 0x117be34?, {0x6e27c0, 0xc0004d0000})
	pkg/sentry/vfs/namespace.go:186 +0x4e8 fp=0xc008decde0 sp=0xc008decc98 pc=0x17713a8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00e0f2000, 0xc008ded368)
	pkg/sentry/kernel/task_clone.go:205 +0x1b05 fp=0xc008ded348 sp=0xc008decde0 pc=0x1ab8b65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x11e7c8c?, 0xffffffffc0020000, 0x20000140, 0x0, 0x20000240, 0x20000280)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0x145 fp=0xc008ded448 sp=0xc008ded348 pc=0x1d5c325
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc002d59540?, 0x11e072e?, {{0xc0020000}, {0x20000140}, {0x0}, {0x20000240}, {0x20000280}, {0x20000280}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc008ded4d0 sp=0xc008ded448 pc=0x1d008cf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00e0f2000, 0x38, {{0xc0020000}, {0x20000140}, {0x0}, {0x20000240}, {0x20000280}, {0x20000280}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaff fp=0xc008ded908 sp=0xc008ded4d0 pc=0x1af213f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00e0f2000, 0x1?, {{0xc0020000}, {0x20000140}, {0x0}, {0x20000240}, {0x20000280}, {0x20000280}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc008ded9c0 sp=0xc008ded908 pc=0x1af41fd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc008383770?, 0x11e9329?, {{0xc0020000}, {0x20000140}, {0x0}, {0x20000240}, {0x20000280}, {0x20000280}})
	pkg/sentry/kernel/task_syscall.go:282 +0xbd fp=0xc008deda38 sp=0xc008ded9c0 pc=0x1af3afd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00e0f2000)
	pkg/sentry/kernel/task_syscall.go:257 +0x55b fp=0xc008dedb70 sp=0xc008deda38 pc=0x1af365b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00e0f2000?, 0xc00e0f2000)
	pkg/sentry/kernel/task_run.go:269 +0x2387 fp=0xc008dede60 sp=0xc008dedb70 pc=0x1adc487
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00e0f2000, 0x25ac)
	pkg/sentry/kernel/task_run.go:98 +0x36a fp=0xc008dedfb0 sp=0xc008dede60 pc=0x1ad97ea
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x45 fp=0xc008dedfe0 sp=0xc008dedfb0 pc=0x1aef9a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc008dedfe8 sp=0xc008dedfe0 pc=0x11e6101
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 572830
	pkg/sentry/kernel/task_start.go:395 +0x1ce