panic: kernfs.Dentry.DecRef() called without holding a reference

goroutine 963312 [running]:
panic(0x188c5c0, 0x1d151a0)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc001eef200 sp=0xc001eef138 pc=0x43a6c5
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc000a8e240, 0x1d5a6a0, 0xc016af3500)
	pkg/sentry/fsimpl/kernfs/kernfs.go:283 +0x10c fp=0xc001eef230 sp=0xc001eef200 pc=0xafa4ac
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc000a8e240, 0x1d5a6a0, 0xc016af3500)
	pkg/sentry/vfs/dentry.go:157 +0x6a fp=0xc001eef258 sp=0xc001eef230 pc=0x94564a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountDisconnected(0xc0002e68f8, 0x1d5a6a0, 0xc016af3500, 0xc000838900, 0xc00ada1800, 0xb, 0xc00ada1700, 0x6, 0xc001eef630, 0xc00d8460c0, ...)
	pkg/sentry/vfs/mount.go:206 +0x2f0 fp=0xc001eef3c8 sp=0xc001eef258 pc=0x95c410
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountAt(0xc0002e68f8, 0x1d5a6a0, 0xc016af3500, 0xc000838900, 0xc00ada1800, 0xb, 0xc001eef660, 0xc00ada1700, 0x6, 0xc001eef630, ...)
	pkg/sentry/vfs/mount.go:273 +0xd5 fp=0xc001eef4a0 sp=0xc001eef3c8 pc=0x95cb35
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Mount(0xc016af3500, 0x20000480, 0x200004c0, 0x20000500, 0x40, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/vfs2/mount.go:112 +0x5d7 fp=0xc001eef710 sp=0xc001eef4a0 pc=0x1412777
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc016af3500, 0xa5, 0x20000480, 0x200004c0, 0x20000500, 0x40, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x453 fp=0xc001eef9b0 sp=0xc001eef710 pc=0xd69f93
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc016af3500, 0xa5, 0x20000480, 0x200004c0, 0x20000500, 0x40, 0x0, 0x0, 0xc016af3ddf, 0xc016af3500)
	pkg/sentry/kernel/task_syscall.go:238 +0xb4 fp=0xc001eefa88 sp=0xc001eef9b0 pc=0xd6b774
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc016af3500, 0xa5, 0x20000480, 0x200004c0, 0x20000500, 0x40, 0x0, 0x0, 0x47910c, 0x486adf)
	pkg/sentry/kernel/task_syscall.go:198 +0x10f fp=0xc001eefb30 sp=0xc001eefa88 pc=0xd6b06f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc016af3500, 0x2, 0xc016af3500)
	pkg/sentry/kernel/task_syscall.go:173 +0x214 fp=0xc001eefca0 sp=0xc001eefb30 pc=0xd6a7f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc016af3500, 0x1d2dd80, 0x0)
	pkg/sentry/kernel/task_run.go:282 +0x12c7 fp=0xc001eefed0 sp=0xc001eefca0 pc=0xd56887
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc016af3500, 0x9f6b)
	pkg/sentry/kernel/task_run.go:97 +0x393 fp=0xc001eeffd0 sp=0xc001eefed0 pc=0xd549b3
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc001eeffd8 sp=0xc001eeffd0 pc=0x477541
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:327 +0x1a5