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

goroutine 718797 [running]:
panic({0x1115fa0?, 0x2a4c410?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc009f74a10 sp=0xc009f74960 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc009f74a70 sp=0xc009f74a10 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x1108f40?)
	pkg/sentry/vfs/mount.go:693 +0xa fp=0xc009f74a78 sp=0xc009f74a70 pc=0x7878ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc0007c0820, 0x0)
	pkg/sentry/vfs/namespace.go:143 +0x1be fp=0xc009f74b48 sp=0xc009f74a78 pc=0x78cffe
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc0007c00a0, 0xc0007c1680)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f74c18 sp=0xc009f74b48 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc001ee0500, 0xc0007c15e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f74ce8 sp=0xc009f74c18 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc001cd6140, 0xc0007c1540)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f74db8 sp=0xc009f74ce8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc001cd61e0, 0xc0007c14a0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f74e88 sp=0xc009f74db8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc01dc9c280, 0xc0007c1360)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f74f58 sp=0xc009f74e88 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc01dc9c5a0, 0xc0007c1400)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f75028 sp=0xc009f74f58 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc000672460, 0xc0007c12c0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f750f8 sp=0xc009f75028 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc000672500, 0xc0007c1220)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f751c8 sp=0xc009f750f8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc01dc9c780, 0xc0007c1180)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f75298 sp=0xc009f751c8 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).updateRootAndCWD(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc007e95ed0, 0xc007e95ee0, 0xc0007c0000, 0xc0007c10e0)
	pkg/sentry/vfs/namespace.go:147 +0x27a fp=0xc009f75368 sp=0xc009f75298 pc=0x78d0ba
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CloneMountNamespace(0xc0005c1a60, {0x15144d8, 0xc009e3c000}, 0xc000735440, 0xc000ab0480, 0xc007cca000?, 0xe400000?, {0x14f7f60, 0xc0005c1880})
	pkg/sentry/vfs/namespace.go:186 +0x270 fp=0xc009f75430 sp=0xc009f75368 pc=0x78d3b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc009e3c000, 0xc009f75810)
	pkg/sentry/kernel/task_clone.go:205 +0xf29 fp=0xc009f75800 sp=0xc009f75430 pc=0x99c089
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x0?, 0xc009e3c7b0?, 0xc007cca000?, 0xfffffffffffbfeff?, 0x7edc9e400000?, 0x7edc9e600000?)
	pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc009f758d0 sp=0xc009f75800 pc=0xb5585d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc009e3c000?, 0x7edc9e401000?, {{0x24266400}, {0x0}, {0x0}, {0x0}, {0x20000180}, {0x20000180}})
	pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x68 fp=0xc009f75910 sp=0xc009f758d0 pc=0xb16948
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc009e3c000, 0x38, {{0x24266400}, {0x0}, {0x0}, {0x0}, {0x20000180}, {0x20000180}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc009f75c50 sp=0xc009f75910 pc=0x9bfc4b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc009e3c000, 0xc0050320c0?, {{0x24266400}, {0x0}, {0x0}, {0x0}, {0x20000180}, {0x20000180}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc009f75cb0 sp=0xc009f75c50 pc=0x9c124e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0025e3df8?, 0xd4de25?, {{0x24266400}, {0x0}, {0x0}, {0x0}, {0x20000180}, {0x20000180}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc009f75d10 sp=0xc009f75cb0 pc=0x9c0e14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc015a1e750?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc009f75e08 sp=0xc009f75d10 pc=0x9c0b08
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001481200?, 0xc009e3c000)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc009f75f48 sp=0xc009f75e08 pc=0x9b2bc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc009e3c000, 0x9f09)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc009f75fc0 sp=0xc009f75f48 pc=0x9b10e2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:395 +0x25 fp=0xc009f75fe0 sp=0xc009f75fc0 pc=0x9be145
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc009f75fe8 sp=0xc009f75fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 718781
	pkg/sentry/kernel/task_start.go:395 +0xf8