panic: Incrementing non-positive count 0xc0063b8808 on tmpfs.inode

goroutine 259 [running]:
panic({0xf82ce0, 0xc00bcdd310})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc0013dd4b0 sp=0xc0013dd3f0 pc=0x4358b7
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).IncRef(0xc0063b8808)
	bazel-out/k8-fastbuild-ST-246649c541f7/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:80 +0x134 fp=0xc0013dd518 sp=0xc0013dd4b0 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(0xc0000124d0?, {0x13831b0, 0xc000d12000}, 0xc0009a8000, {0x0?})
	pkg/sentry/fsimpl/tmpfs/filesystem.go:258 +0x225 fp=0xc0013dd588 sp=0xc0013dd518 pc=0x86c245
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).GetDentryAt(0x40?, {0x13831b0, 0xc000d12000}, 0xc000d12000?, 0xc0013dd740?, 0xc0013dd635)
	pkg/sentry/vfs/vfs.go:229 +0x88 fp=0xc0013dd5e8 sp=0xc0013dd588 pc=0x7647e8
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).UmountAt(0xc0000124d0, {0x13831b0, 0xc000d12000}, 0xc000befc00?, 0xc004c1fb00?, 0xc0013dd84c)
	pkg/sentry/vfs/mount.go:643 +0x108 fp=0xc0013dd7c0 sp=0xc0013dd5e8 pc=0x757ac8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Umount2(0xc000d12000, {{0x7f316e3c4480}, {0xa}, {0x7f316e3c4492}, {0x5570cdab2763}, {0xffffffff}, {0x7f316e3c4250}})
	pkg/sentry/syscalls/linux/sys_mount.go:171 +0x326 fp=0xc0013dd958 sp=0xc0013dd7c0 pc=0xac72a6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000d12000, 0xa6, {{0x7f316e3c4480}, {0xa}, {0x7f316e3c4492}, {0x5570cdab2763}, {0xffffffff}, {0x7f316e3c4250}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0013ddc98 sp=0xc0013dd958 pc=0x9766ab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000d12000, 0x85?, {{0x7f316e3c4480}, {0xa}, {0x7f316e3c4492}, {0x5570cdab2763}, {0xffffffff}, {0x7f316e3c4250}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0013ddcf8 sp=0xc0013ddc98 pc=0x977c94
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x81018f?, 0x0?, {{0x7f316e3c4480}, {0xa}, {0x7f316e3c4492}, {0x5570cdab2763}, {0xffffffff}, {0x7f316e3c4250}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0013ddd58 sp=0xc0013ddcf8 pc=0x977885
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000bedba0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0013dde50 sp=0xc0013ddd58 pc=0x97754c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0?, 0xc000d12000)
	pkg/sentry/kernel/task_run.go:253 +0x1125 fp=0xc0013ddf60 sp=0xc0013dde50 pc=0x969465
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000d12000, 0x29)
	pkg/sentry/kernel/task_run.go:94 +0x1ec fp=0xc0013ddfc0 sp=0xc0013ddf60 pc=0x967cac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x2a fp=0xc0013ddfe0 sp=0xc0013ddfc0 pc=0x974b4a
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc0013ddfe8 sp=0xc0013ddfe0 pc=0x4695c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x105