panic: Incrementing non-positive count 0xc007c30408 on tmpfs.inode

goroutine 293 [running]:
panic({0xf82ce0, 0xc0060963c0})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc0010034b0 sp=0xc0010033f0 pc=0x4358b7
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc007c30408)
	bazel-out/k8-fastbuild-ST-246649c541f7/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0x134 fp=0xc001003518 sp=0xc0010034b0 pc=0x874854
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).incRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:520
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).IncRef(...)
	pkg/sentry/fsimpl/tmpfs/tmpfs.go:377
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).GetDentryAt(0xc00075a1d0?, {0x13831b0, 0xc0009b9500}, 0xc000d9c000, {0x0?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:258 +0x225 fp=0xc001003588 sp=0xc001003518 pc=0x86c245
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40?, {0x13831b0, 0xc0009b9500}, 0xc0009b9500?, 0xc001003740?, 0xc001003635)
	pkg/sentry/vfs/vfs.go:229 +0x88 fp=0xc0010035e8 sp=0xc001003588 pc=0x7647e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc00075a1d0, {0x13831b0, 0xc0009b9500}, 0xc000d86800?, 0xc00523c200?, 0xc00100384c)
	pkg/sentry/vfs/mount.go:643 +0x108 fp=0xc0010037c0 sp=0xc0010035e8 pc=0x757ac8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc0009b9500, {{0x7f04f98b0480}, {0xa}, {0x7f04f98b0492}, {0x55b298d14763}, {0xffffffff}, {0x7f04f98b0250}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x326 fp=0xc001003958 sp=0xc0010037c0 pc=0xac72a6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0009b9500, 0xa6, {{0x7f04f98b0480}, {0xa}, {0x7f04f98b0492}, {0x55b298d14763}, {0xffffffff}, {0x7f04f98b0250}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc001003c98 sp=0xc001003958 pc=0x9766ab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0009b9500, 0x85?, {{0x7f04f98b0480}, {0xa}, {0x7f04f98b0492}, {0x55b298d14763}, {0xffffffff}, {0x7f04f98b0250}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc001003cf8 sp=0xc001003c98 pc=0x977c94
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x81018f?, 0x0?, {{0x7f04f98b0480}, {0xa}, {0x7f04f98b0492}, {0x55b298d14763}, {0xffffffff}, {0x7f04f98b0250}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc001003d58 sp=0xc001003cf8 pc=0x977885
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000670820?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc001003e50 sp=0xc001003d58 pc=0x97754c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0?, 0xc0009b9500)
	pkg/sentry/kernel/task_run.go:253 +0x1125 fp=0xc001003f60 sp=0xc001003e50 pc=0x969465
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0009b9500, 0x2b)
	pkg/sentry/kernel/task_run.go:94 +0x1ec fp=0xc001003fc0 sp=0xc001003f60 pc=0x967cac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x2a fp=0xc001003fe0 sp=0xc001003fc0 pc=0x974b4a
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc001003fe8 sp=0xc001003fe0 pc=0x4695c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x105