panic: Incrementing non-positive count 0xc0091a0c58 on tmpfs.inode

goroutine 2579320 [running]:
panic({0x10c1b00, 0xc00a520560})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc000f533c0 sp=0xc000f53300 pc=0x436cdb
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc0091a0c58)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0xfb fp=0xc000f53428 sp=0xc000f533c0 pc=0x84343b
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(0xc000501de0?, {0x151afb8, 0xc007a1f500}, 0xc0035fa480, {0xf3?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:255 +0x1a5 fp=0xc000f53498 sp=0xc000f53428 pc=0x83c7c5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x7f777e?, {0x151afb8, 0xc007a1f500}, 0x151afb8?, 0xc007a1f500?, 0xc000f5354d)
	pkg/sentry/vfs/vfs.go:248 +0x92 fp=0xc000f53500 sp=0xc000f53498 pc=0x755212
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc000501de0, {0x151afb8, 0xc007a1f500}, 0xc00a323c00?, 0xc0035d8800?, 0xc000f5375c)
	pkg/sentry/vfs/mount.go:459 +0xd6 fp=0xc000f536d0 sp=0xc000f53500 pc=0x749476
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc007a1f500, 0x80ac6d?, {{0x7eff317fd640}, {0xa}, {0xc}, {0x0}, {0xba36b78}, {0x17c8}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x2b2 fp=0xc000f53868 sp=0xc000f536d0 pc=0xa7b5d2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc007a1f500, 0xa6, {{0x7eff317fd640}, {0xa}, {0xc}, {0x0}, {0xba36b78}, {0x17c8}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc000f53c58 sp=0xc000f53868 pc=0x943075
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc007a1f500, 0xc0031dd260?, {{0x7eff317fd640}, {0xa}, {0xc}, {0x0}, {0xba36b78}, {0x17c8}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc000f53cb8 sp=0xc000f53c58 pc=0x9442aa
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000f53e00?, 0xc2ab59?, {{0x7eff317fd640}, {0xa}, {0xc}, {0x0}, {0xba36b78}, {0x17c8}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc000f53d18 sp=0xc000f53cb8 pc=0x943f85
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc003438ea0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc000f53e10 sp=0xc000f53d18 pc=0x943cf0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc007a1f500?, 0xc007a1f500)
	pkg/sentry/kernel/task_run.go:269 +0x103e fp=0xc000f53f48 sp=0xc000f53e10 pc=0x937e7e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc007a1f500, 0x5610)
	pkg/sentry/kernel/task_run.go:98 +0x1f8 fp=0xc000f53fc0 sp=0xc000f53f48 pc=0x936798
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc000f53fe0 sp=0xc000f53fc0 pc=0x94186a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc000f53fe8 sp=0xc000f53fe0 pc=0x46d741
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0xef