panic: Incrementing non-positive count 0xc004c91458 on tmpfs.inode

goroutine 292 [running]:
panic({0x10f2ce0?, 0xc00b212f70?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc001991500 sp=0xc001991450 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc004c91458)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:81 +0x119 fp=0xc001991568 sp=0xc001991500 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(0xc00021b6d8?, {0x1580618, 0xc00077a000}, 0xc009cfa900, {0xe0?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:256 +0x216 fp=0xc0019915d8 sp=0xc001991568 pc=0x9075b6
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40?, {0x1580618, 0xc00077a000}, 0xc?, 0xc001991678?, 0xc001991677)
	pkg/sentry/vfs/vfs.go:263 +0x9f fp=0xc001991640 sp=0xc0019915d8 pc=0x7ab1bf
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).getMountpoint(0xc0001d3600?, {0x1580618, 0xc00077a000}, 0xc0008fc108?, 0xc0001d3600?)
	pkg/sentry/vfs/mount.go:909 +0x3f fp=0xc0019916a8 sp=0xc001991640 pc=0x79abff
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc00021b6d8, {0x1580618, 0xc00077a000}, 0xc000c15400?, 0xc001799e00?, 0xc001991804)
	pkg/sentry/vfs/mount.go:571 +0xdd fp=0xc001991778 sp=0xc0019916a8 pc=0x79931d
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc00077a000, 0x59107b?, {{0x7ee64d95d500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_mount.go:164 +0x2f7 fp=0xc001991910 sp=0xc001991778 pc=0xb94957
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00077a000, 0xa6, {{0x7ee64d95d500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc001991c50 sp=0xc001991910 pc=0xa2298b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00077a000, 0xc000346f00?, {{0x7ee64d95d500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4e fp=0xc001991cb0 sp=0xc001991c50 pc=0xa23f8e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001991df8?, 0xdd9127?, {{0x7ee64d95d500}, {0xa}, {0x0}, {0xffffffff}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x74 fp=0xc001991d10 sp=0xc001991cb0 pc=0xa23b54
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000a1c4e0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3a8 fp=0xc001991e08 sp=0xc001991d10 pc=0xa23848
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00077a000?, 0xc00077a000)
	pkg/sentry/kernel/task_run.go:269 +0x1405 fp=0xc001991f48 sp=0xc001991e08 pc=0xa15945
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00077a000, 0x1b)
	pkg/sentry/kernel/task_run.go:98 +0x262 fp=0xc001991fc0 sp=0xc001991f48 pc=0xa13e62
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc001991fe0 sp=0xc001991fc0 pc=0xa20e85
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc001991fe8 sp=0xc001991fe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 307
	pkg/sentry/kernel/task_start.go:391 +0xf8