panic: Incrementing non-positive count 0xc003266058 on tmpfs.inode

goroutine 390 [running]:
panic({0x11c8940, 0xc000cc3620})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc000545468 sp=0xc0005453a8 pc=0x436afb
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc003266058)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0x134 fp=0xc0005454d0 sp=0xc000545468 pc=0x8a8cd4
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).incRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:544
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).IncRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:401
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).GetDentryAt(0xc00025fde0?, {0x164d9d8, 0xc000b47500}, 0xc005cbf680, {0x13?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:255 +0x225 fp=0xc000545540 sp=0xc0005454d0 pc=0x8a0a45
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40db08?, {0x164d9d8, 0xc000b47500}, 0x84e4f7?, 0xc000545600?, 0xc0005455f5)
	pkg/sentry/vfs/vfs.go:242 +0xa6 fp=0xc0005455a8 sp=0xc000545540 pc=0x78d646
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc00025fde0, {0x164d9d8, 0xc000b47500}, 0xc000792400?, 0xc008822400?, 0xc00054580c)
	pkg/sentry/vfs/mount.go:459 +0x108 fp=0xc000545780 sp=0xc0005455a8 pc=0x77f1c8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc000b47500, 0x592106?, {{0x7ea98cdb0640}, {0xa}, {0xc}, {0x0}, {0x84255c4}, {0x1a08}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x2fa fp=0xc000545918 sp=0xc000545780 pc=0xb399da
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000b47500, 0xa6, {{0x7ea98cdb0640}, {0xa}, {0xc}, {0x0}, {0x84255c4}, {0x1a08}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc000545c58 sp=0xc000545918 pc=0x9ccc2b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000b47500, 0xc000cb8f60?, {{0x7ea98cdb0640}, {0xa}, {0xc}, {0x0}, {0x84255c4}, {0x1a08}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc000545cb8 sp=0xc000545c58 pc=0x9ce214
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000545e00?, 0xd0d9f9?, {{0x7ea98cdb0640}, {0xa}, {0xc}, {0x0}, {0x84255c4}, {0x1a08}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc000545d18 sp=0xc000545cb8 pc=0x9cde05
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00097d0a0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc000545e10 sp=0xc000545d18 pc=0x9cdacc
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000b47500?, 0xc000b47500)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc000545f48 sp=0xc000545e10 pc=0x9bf64a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000b47500, 0x29)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc000545fc0 sp=0xc000545f48 pc=0x9bdafc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc000545fe0 sp=0xc000545fc0 pc=0x9cb0aa
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc000545fe8 sp=0xc000545fe0 pc=0x46d561
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105