panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7878ea]

goroutine 2294916 [running]:
panic({0x1115fa0?, 0x2a4c410?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc000afd568 sp=0xc000afd4b8 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc000afd5c8 sp=0xc000afd568 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1108f40?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc000afd5d0 sp=0xc000afd5c8 pc=0x7878ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00040aaa0, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1be fp=0xc000afd6a0 sp=0xc000afd5d0 pc=0x78cffe
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00040a280, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afd770 sp=0xc000afd6a0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00851a6e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afd840 sp=0xc000afd770 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc006f2c320, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afd910 sp=0xc000afd840 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d9a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afd9e0 sp=0xc000afd910 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d860, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdab0 sp=0xc000afd9e0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563dae0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdb80 sp=0xc000afdab0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563dc20, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdc50 sp=0xc000afdb80 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d720, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdd20 sp=0xc000afdc50 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563dd60, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afddf0 sp=0xc000afdd20 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d5e0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdec0 sp=0xc000afddf0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563dea0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afdf90 sp=0xc000afdec0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32000, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe060 sp=0xc000afdf90 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d4a0, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe130 sp=0xc000afe060 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d360, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe200 sp=0xc000afe130 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32140, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe2d0 sp=0xc000afe200 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d220, 0x0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe3a0 sp=0xc000afe2d0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c323c0, 0xc007c33720)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe470 sp=0xc000afe3a0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32280, 0xc007c335e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe540 sp=0xc000afe470 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563d0e0, 0xc007c33540)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe610 sp=0xc000afe540 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32640, 0xc007c334a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe6e0 sp=0xc000afe610 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563cfa0, 0xc007c33400)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe7b0 sp=0xc000afe6e0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32780, 0xc007c33360)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe880 sp=0xc000afe7b0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563ce60, 0xc007c332c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afe950 sp=0xc000afe880 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c328c0, 0xc007c33220)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afea20 sp=0xc000afe950 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563cd20, 0xc007c33180)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afeaf0 sp=0xc000afea20 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32a00, 0xc007c330e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afebc0 sp=0xc000afeaf0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32b40, 0xc007c33040)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afec90 sp=0xc000afebc0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563cbe0, 0xc007c32fa0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afed60 sp=0xc000afec90 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc007c32c80, 0xc007c32f00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afee30 sp=0xc000afed60 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563caa0, 0xc007c32e60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afef00 sp=0xc000afee30 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563c960, 0xc007c32dc0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000afefd0 sp=0xc000afef00 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563c820, 0xc007c32d20)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000aff0a0 sp=0xc000afefd0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563c6e0, 0xc00851bf40)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000aff170 sp=0xc000aff0a0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563c5a0, 0xc00851bea0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000aff240 sp=0xc000aff170 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00563c460, 0xc00851be00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000aff310 sp=0xc000aff240 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00577f3d0, 0xc00577f3e0, 0xc00040a1e0, 0xc00851bd60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc000aff3e0 sp=0xc000aff310 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc00021fde0, {0x15144d8, 0xc00576a000}, 0xc00033f200, 0xc0006c8ae0, 0x0?, 0x0?, {0x14f7f60, 0xc00021fc00})
	pkg/sentry/vfs/namespace.go:186 +0x270 fp=0xc000aff4a8 sp=0xc000aff3e0 pc=0x78d3b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00576a000, 0xc000aff8a0)
	pkg/sentry/kernel/task_clone.go:205 +0xf29 fp=0xc000aff878 sp=0xc000aff4a8 pc=0x99c089
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone3(0x0?, 0x0?, {{0x7f48fccd5fb0}, {0x58}, {0x7f48fccd5fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/syscalls/linux/sys_thread.go:252 +0xe6 fp=0xc000aff910 sp=0xc000aff878 pc=0xb55a66
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00576a000, 0x1b3, {{0x7f48fccd5fb0}, {0x58}, {0x7f48fccd5fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc000affc50 sp=0xc000aff910 pc=0x9bfc4b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00576a000, 0xc006f9c5a0?, {{0x7f48fccd5fb0}, {0x58}, {0x7f48fccd5fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc000affcb0 sp=0xc000affc50 pc=0x9c124e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x5?, 0xc001c06c00?, {{0x7f48fccd5fb0}, {0x58}, {0x7f48fccd5fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc000affd10 sp=0xc000affcb0 pc=0x9c0e14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc004b84750?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc000affe08 sp=0xc000affd10 pc=0x9c0b08
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc005f5c980?, 0xc00576a000)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc000afff48 sp=0xc000affe08 pc=0x9b2bc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00576a000, 0xd702)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc000afffc0 sp=0xc000afff48 pc=0x9b10e2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x25 fp=0xc000afffe0 sp=0xc000afffc0 pc=0x9be145
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc000afffe8 sp=0xc000afffe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 2294893
	pkg/sentry/kernel/task_start.go:395 +0xf8