panic: Incrementing non-positive count 0xc0067b6588 on tmpfs.inode

goroutine 310835 [running]:
panic({0x10f2ce0?, 0xc003f44530?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc00ef0b500 sp=0xc00ef0b450 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc0067b6588)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:81 +0x119 fp=0xc00ef0b568 sp=0xc00ef0b500 pc=0x90f859
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).incRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:591
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).IncRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:447
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).GetDentryAt(0xc000386c58?, {0x1580618, 0xc0010e6a80}, 0xc00d1c0000, {0xe0?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:256 +0x216 fp=0xc00ef0b5d8 sp=0xc00ef0b568 pc=0x9075b6
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40?, {0x1580618, 0xc0010e6a80}, 0xd?, 0xc00ef0b678?, 0xc00ef0b677)
	pkg/sentry/vfs/vfs.go:263 +0x9f fp=0xc00ef0b640 sp=0xc00ef0b5d8 pc=0x7ab1bf
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).getMountpoint(0xc00a8f93f0?, {0x1580618, 0xc0010e6a80}, 0xc0050b59c8?, 0xc00a8f93f0?)
	pkg/sentry/vfs/mount.go:909 +0x3f fp=0xc00ef0b6a8 sp=0xc00ef0b640 pc=0x79abff
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc000386c58, {0x1580618, 0xc0010e6a80}, 0xc005966400?, 0xc006e8ee00?, 0xc00ef0b804)
	pkg/sentry/vfs/mount.go:571 +0xdd fp=0xc00ef0b778 sp=0xc00ef0b6a8 pc=0x79931d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc0010e6a80, 0x7f395dc57000?, {{0x7f395dc56500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mount.go:164 +0x2f7 fp=0xc00ef0b910 sp=0xc00ef0b778 pc=0xb94957
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0010e6a80, 0xa6, {{0x7f395dc56500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00ef0bc50 sp=0xc00ef0b910 pc=0xa2298b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0010e6a80, 0x0?, {{0x7f395dc56500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc00ef0bcb0 sp=0xc00ef0bc50 pc=0xa23f8e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0003c4238?, 0xc00ef0bdf8?, {{0x7f395dc56500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc00ef0bd10 sp=0xc00ef0bcb0 pc=0xa23b54
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc003ee5ce0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc00ef0be08 sp=0xc00ef0bd10 pc=0xa23848
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0010e6a80?, 0xc0010e6a80)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc00ef0bf48 sp=0xc00ef0be08 pc=0xa15945
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0010e6a80, 0x3c65)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc00ef0bfc0 sp=0xc00ef0bf48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc00ef0bfe0 sp=0xc00ef0bfc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00ef0bfe8 sp=0xc00ef0bfe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 304704
	pkg/sentry/kernel/task_start.go:391 +0xf8