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

goroutine 2028170 [running]:
panic({0x1116f20?, 0x2a4e390?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc001149638 sp=0xc001149588 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc001149698 sp=0xc001149638 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1109e60?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc0011496a0 sp=0xc001149698 pc=0x7878ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc0005a66e0, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1be fp=0xc001149770 sp=0xc0011496a0 pc=0x78cffe
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc0005a6460, 0xc004d528c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149840 sp=0xc001149770 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e000, 0xc004d52820)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149910 sp=0xc001149840 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00149c000, 0xc004d52780)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0011499e0 sp=0xc001149910 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e460, 0xc004d526e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149ab0 sp=0xc0011499e0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745eaa0, 0xc004d52640)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149b80 sp=0xc001149ab0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745ea00, 0xc004d52500)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149c50 sp=0xc001149b80 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e140, 0xc004d525a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149d20 sp=0xc001149c50 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745ebe0, 0xc004d52460)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149df0 sp=0xc001149d20 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e1e0, 0xc004d523c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149ec0 sp=0xc001149df0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e460, 0xc004d52320)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc001149f90 sp=0xc001149ec0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e6e0, 0xc004d52280)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a060 sp=0xc001149f90 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745efa0, 0xc004d521e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a130 sp=0xc00114a060 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745f040, 0xc004d52140)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a200 sp=0xc00114a130 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00149c0a0, 0xc004d520a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a2d0 sp=0xc00114a200 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e640, 0xc004d52000)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a3a0 sp=0xc00114a2d0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e5a0, 0xc0005a7f40)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a470 sp=0xc00114a3a0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e500, 0xc0005a7ea0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a540 sp=0xc00114a470 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e3c0, 0xc0005a7e00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a610 sp=0xc00114a540 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e320, 0xc0005a7d60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a6e0 sp=0xc00114a610 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e280, 0xc0005a7cc0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a7b0 sp=0xc00114a6e0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745ef00, 0xc0005a7c20)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a880 sp=0xc00114a7b0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745ee60, 0xc0005a7b80)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114a950 sp=0xc00114a880 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745edc0, 0xc0005a7ae0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114aa20 sp=0xc00114a950 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745ed20, 0xc0005a7a40)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114aaf0 sp=0xc00114aa20 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e960, 0xc0005a79a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114abc0 sp=0xc00114aaf0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e8c0, 0xc0005a7900)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114ac90 sp=0xc00114abc0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e820, 0xc0005a7860)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114ad60 sp=0xc00114ac90 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e6e0, 0xc0005a77c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114ae30 sp=0xc00114ad60 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e640, 0xc0005a7680)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114af00 sp=0xc00114ae30 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e5a0, 0xc0005a75e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114afd0 sp=0xc00114af00 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e500, 0xc0005a7540)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114b0a0 sp=0xc00114afd0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc002b1e000, 0xc0005a74a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114b170 sp=0xc00114b0a0 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e320, 0xc0005a7400)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114b240 sp=0xc00114b170 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc00745e1e0, 0xc0005a7360)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114b310 sp=0xc00114b240 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc009cfc190, 0xc009cfc1a0, 0xc0005a63c0, 0xc0005a72c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00114b3e0 sp=0xc00114b310 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc000489a60, {0x15155f8, 0xc0076f8a80}, 0xc00019be60, 0xc0008fa690, 0x0?, 0x0?, {0x14f9080, 0xc000489880})
	pkg/sentry/vfs/namespace.go:186 +0x270 fp=0xc00114b4a8 sp=0xc00114b3e0 pc=0x78d3b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc0076f8a80, 0xc00114b8a0)
	pkg/sentry/kernel/task_clone.go:205 +0xf29 fp=0xc00114b878 sp=0xc00114b4a8 pc=0x99c5e9
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone3(0xc0076f8a80?, 0x7ed5a3401000?, {{0x7ed5a3bd9fb0}, {0x58}, {0x7ed5a3bd9fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/syscalls/linux/sys_thread.go:252 +0xe6 fp=0xc00114b910 sp=0xc00114b878 pc=0xb55fc6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0076f8a80, 0x1b3, {{0x7ed5a3bd9fb0}, {0x58}, {0x7ed5a3bd9fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00114bc50 sp=0xc00114b910 pc=0x9c01ab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0076f8a80, 0xc00143ecc0?, {{0x7ed5a3bd9fb0}, {0x58}, {0x7ed5a3bd9fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc00114bcb0 sp=0xc00114bc50 pc=0x9c17ae
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0049dfdf8?, 0xd4e385?, {{0x7ed5a3bd9fb0}, {0x58}, {0x7ed5a3bd9fb0}, {0x0}, {0x0}, {0x58}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc00114bd10 sp=0xc00114bcb0 pc=0x9c1374
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00727f860?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc00114be08 sp=0xc00114bd10 pc=0x9c1068
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc008ee3980?, 0xc0076f8a80)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc00114bf48 sp=0xc00114be08 pc=0x9b3125
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0076f8a80, 0x3631)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc00114bfc0 sp=0xc00114bf48 pc=0x9b1642
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x25 fp=0xc00114bfe0 sp=0xc00114bfc0 pc=0x9be6a5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00114bfe8 sp=0xc00114bfe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 2028095
	pkg/sentry/kernel/task_start.go:395 +0xf8