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

goroutine 963453 [running]:
panic({0x1115fa0?, 0x2a4c590?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc002268530 sp=0xc002268480 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc002268590 sp=0xc002268530 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1108f40?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc002268598 sp=0xc002268590 pc=0x7878ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc000129220, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1be fp=0xc002268668 sp=0xc002268598 pc=0x78cffe
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc000128e60, 0xc006919e00)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268738 sp=0xc002268668 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc004f73540, 0xc006919d60)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268808 sp=0xc002268738 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc001c8bf40, 0xc006919cc0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022688d8 sp=0xc002268808 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006e2d4a0, 0xc006919c20)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022689a8 sp=0xc0022688d8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918500, 0xc006919ae0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268a78 sp=0xc0022689a8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc0069185a0, 0xc006919b80)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268b48 sp=0xc002268a78 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc0069183c0, 0xc006919860)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268c18 sp=0xc002268b48 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918320, 0xc0069197c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268ce8 sp=0xc002268c18 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918280, 0xc006919720)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268db8 sp=0xc002268ce8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc0069186e0, 0xc006919680)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268e88 sp=0xc002268db8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc0069181e0, 0xc0069195e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002268f58 sp=0xc002268e88 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918140, 0xc006919540)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002269028 sp=0xc002268f58 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc0069180a0, 0xc0069194a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022690f8 sp=0xc002269028 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918780, 0xc006919400)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc0022691c8 sp=0xc0022690f8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc006918000, 0xc006919360)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002269298 sp=0xc0022691c8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc00b1d9310, 0xc00b1d9320, 0xc000128320, 0xc0069192c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc002269368 sp=0xc002269298 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0001c4fe0, {0x15144d8, 0xc00626f500}, 0xc0009dc540, 0xc000bb0570, 0xc001ed1200?, 0xe200000?, {0x14f7f60, 0xc0001c4e00})
	pkg/sentry/vfs/namespace.go:186 +0x270 fp=0xc002269430 sp=0xc002269368 pc=0x78d3b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc00626f500, 0xc002269810)
	pkg/sentry/kernel/task_clone.go:205 +0xf29 fp=0xc002269800 sp=0xc002269430 pc=0x99c089
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x0?, 0xc00ae0b918?, 0x418f8b?, 0x2aa4a48?, 0x424b65?, 0x7fb780400000?)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc0022698d0 sp=0xc002269800 pc=0xb5585d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0x2?, 0xc00ae0b960?, {{0xcd328000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x68 fp=0xc002269910 sp=0xc0022698d0 pc=0xb16948
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00626f500, 0x38, {{0xcd328000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc002269c50 sp=0xc002269910 pc=0x9bfc4b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00626f500, 0x1?, {{0xcd328000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc002269cb0 sp=0xc002269c50 pc=0x9c124e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000216238?, 0xc00ae0bdf8?, {{0xcd328000}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc002269d10 sp=0xc002269cb0 pc=0x9c0e14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc007dfc0b0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc002269e08 sp=0xc002269d10 pc=0x9c0b08
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc007e1ac00?, 0xc00626f500)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc002269f48 sp=0xc002269e08 pc=0x9b2bc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00626f500, 0xf116)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc002269fc0 sp=0xc002269f48 pc=0x9b10e2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x25 fp=0xc002269fe0 sp=0xc002269fc0 pc=0x9be145
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc002269fe8 sp=0xc002269fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 963566
	pkg/sentry/kernel/task_start.go:395 +0xf8