panic: Incrementing non-positive count 0xc0041b7058 on tmpfs.inode

goroutine 387 [running]:
panic({0x11c4e80, 0xc0074fcc10})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc00874f468 sp=0xc00874f3a8 pc=0x436afb
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc0041b7058)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0x134 fp=0xc00874f4d0 sp=0xc00874f468 pc=0x8a7fb4
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(0xc0004b2c60?, {0x1647f78, 0xc0004d7500}, 0xc0002a1680, {0x13?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:255 +0x225 fp=0xc00874f540 sp=0xc00874f4d0 pc=0x89fd25
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40db08?, {0x1647f78, 0xc0004d7500}, 0x84d7d7?, 0xc00874f600?, 0xc00874f5f5)
	pkg/sentry/vfs/vfs.go:242 +0xa6 fp=0xc00874f5a8 sp=0xc00874f540 pc=0x78c926
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc0004b2c60, {0x1647f78, 0xc0004d7500}, 0xc0004f3800?, 0xc00726d000?, 0xc00874f80c)
	pkg/sentry/vfs/mount.go:459 +0x108 fp=0xc00874f780 sp=0xc00874f5a8 pc=0x77e4a8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc0004d7500, 0x0?, {{0x7f11adc36640}, {0xa}, {0xc}, {0x0}, {0x5e97b52}, {0x10e6}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x2fa fp=0xc00874f918 sp=0xc00874f780 pc=0xb3905a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0004d7500, 0xa6, {{0x7f11adc36640}, {0xa}, {0xc}, {0x0}, {0x5e97b52}, {0x10e6}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00874fc58 sp=0xc00874f918 pc=0x9cc40b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0004d7500, 0x85?, {{0x7f11adc36640}, {0xa}, {0xc}, {0x0}, {0x5e97b52}, {0x10e6}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc00874fcb8 sp=0xc00874fc58 pc=0x9cd9f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x84044f?, 0x0?, {{0x7f11adc36640}, {0xa}, {0xc}, {0x0}, {0x5e97b52}, {0x10e6}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc00874fd18 sp=0xc00874fcb8 pc=0x9cd5e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00031aea0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc00874fe10 sp=0xc00874fd18 pc=0x9cd2ac
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0004d7500?, 0xc0004d7500)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc00874ff48 sp=0xc00874fe10 pc=0x9bee2a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0004d7500, 0x1d)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc00874ffc0 sp=0xc00874ff48 pc=0x9bd2dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc00874ffe0 sp=0xc00874ffc0 pc=0x9ca88a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc00874ffe8 sp=0xc00874ffe0 pc=0x46d561
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105