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

goroutine 1521440 [running]:
panic({0x1115fa0?, 0x2a4c590?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc00cccb280 sp=0xc00cccb1d0 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc00cccb2e0 sp=0xc00cccb280 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1108f40?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc00cccb2e8 sp=0xc00cccb2e0 pc=0x7878ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc0000dee60, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1be fp=0xc00cccb3b8 sp=0xc00cccb2e8 pc=0x78cffe
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc0000de320, 0xc00d41caa0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb488 sp=0xc00cccb3b8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc006130000, 0xc00d41ca00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb558 sp=0xc00cccb488 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc006130140, 0xc00d41c960)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb628 sp=0xc00cccb558 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc0061301e0, 0xc00d41c8c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb6f8 sp=0xc00cccb628 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc000d401e0, 0xc00d41c820)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb7c8 sp=0xc00cccb6f8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc0009f2aa0, 0xc00d41c6e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb898 sp=0xc00cccb7c8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ee60, 0xc00d41c780)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccb968 sp=0xc00cccb898 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f360, 0xc00d41c640)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccba38 sp=0xc00cccb968 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f4a0, 0xc00d41c5a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbb08 sp=0xc00cccba38 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f2c0, 0xc00d41c500)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbbd8 sp=0xc00cccbb08 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f220, 0xc00d41c460)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbca8 sp=0xc00cccbbd8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f720, 0xc00d41c3c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbd78 sp=0xc00cccbca8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f680, 0xc00d41c320)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbe48 sp=0xc00cccbd78 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f5e0, 0xc00d41c280)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbf18 sp=0xc00cccbe48 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f540, 0xc00d41c1e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccbfe8 sp=0xc00cccbf18 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f180, 0xc00d41c140)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc0b8 sp=0xc00cccbfe8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f0e0, 0xc00d41c0a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc188 sp=0xc00cccc0b8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45f040, 0xc00d41c000)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc258 sp=0xc00cccc188 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45efa0, 0xc000d41f40)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc328 sp=0xc00cccc258 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ef00, 0xc000d41ea0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc3f8 sp=0xc00cccc328 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45edc0, 0xc000d41e00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc4c8 sp=0xc00cccc3f8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ed20, 0xc000d41d60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc598 sp=0xc00cccc4c8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ec80, 0xc000d41cc0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc668 sp=0xc00cccc598 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ebe0, 0xc000d41c20)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc738 sp=0xc00cccc668 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45eb40, 0xc000d41b80)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc808 sp=0xc00cccc738 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45eaa0, 0xc000d41ae0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc8d8 sp=0xc00cccc808 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45ea00, 0xc000d41a40)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccc9a8 sp=0xc00cccc8d8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e960, 0xc000d419a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccca78 sp=0xc00cccc9a8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e8c0, 0xc000d41900)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00ccccb48 sp=0xc00cccca78 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e820, 0xc000d41860)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00ccccc18 sp=0xc00ccccb48 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e780, 0xc000d417c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00ccccce8 sp=0xc00ccccc18 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e6e0, 0xc000d41720)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00ccccdb8 sp=0xc00ccccce8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e640, 0xc000d41680)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccce88 sp=0xc00ccccdb8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e5a0, 0xc000d415e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00ccccf58 sp=0xc00cccce88 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e500, 0xc000d41540)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccd028 sp=0xc00ccccf58 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e460, 0xc000d41400)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccd0f8 sp=0xc00cccd028 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e3c0, 0xc000d41360)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccd1c8 sp=0xc00cccd0f8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc00d45e320, 0xc000d412c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccd298 sp=0xc00cccd1c8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc00b490050, 0xc00b490060, 0xc0000de1e0, 0xc000d41220)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc00cccd368 sp=0xc00cccd298 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc00020efe0, {0x15144d8, 0xc00cf62000}, 0xc000666a20, 0xc000550930, 0xc00cf60600?, 0xe200000?, {0x14f7f60, 0xc00020ee00})
	pkg/sentry/vfs/namespace.go:186 +0x270 fp=0xc00cccd430 sp=0xc00cccd368 pc=0x78d3b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00cf62000, 0xc00cccd810)
	pkg/sentry/kernel/task_clone.go:205 +0xf29 fp=0xc00cccd800 sp=0xc00cccd430 pc=0x99c089
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x0?, 0xc00cf627b0?, 0xc00cf60600?, 0xfffffffffffbfeff?, 0x7fc04e800000?, 0x7fc04ea00000?)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc00cccd8d0 sp=0xc00cccd800 pc=0xb5585d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc00cf62000?, 0x7fc04e801000?, {{0x20000}, {0x20000080}, {0x20000140}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x68 fp=0xc00cccd910 sp=0xc00cccd8d0 pc=0xb16948
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00cf62000, 0x38, {{0x20000}, {0x20000080}, {0x20000140}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00cccdc50 sp=0xc00cccd910 pc=0x9bfc4b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00cf62000, 0x1?, {{0x20000}, {0x20000080}, {0x20000140}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc00cccdcb0 sp=0xc00cccdc50 pc=0x9c124e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00025e5f8?, 0xc00a39ddf8?, {{0x20000}, {0x20000080}, {0x20000140}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc00cccdd10 sp=0xc00cccdcb0 pc=0x9c0e14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00e70ec60?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc00cccde08 sp=0xc00cccdd10 pc=0x9c0b08
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000c9d900?, 0xc00cf62000)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc00cccdf48 sp=0xc00cccde08 pc=0x9b2bc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00cf62000, 0x7d7a)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc00cccdfc0 sp=0xc00cccdf48 pc=0x9b10e2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x25 fp=0xc00cccdfe0 sp=0xc00cccdfc0 pc=0x9be145
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00cccdfe8 sp=0xc00cccdfe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1521564
	pkg/sentry/kernel/task_start.go:395 +0xf8