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

goroutine 321 [running]:
panic({0xf82ce0, 0x1368f68})
	GOROOT/src/runtime/panic.go:941 +0x397 fp=0xc0008a1350 sp=0xc0008a1290 pc=0x4358b7
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0008a13a0?, {0x13831b0?, 0xc000679500?})
	pkg/sentry/fsimpl/kernfs/kernfs.go:290 +0xed fp=0xc0008a1378 sp=0xc0008a1350 pc=0x7dc18d
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...)
	pkg/sentry/vfs/dentry.go:155
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000172e80?, 0xc0004741b0?}, {0x13831b0, 0xc000679500})
	pkg/sentry/vfs/vfs.go:926 +0x59 fp=0xc0008a13a8 sp=0xc0008a1378 pc=0x768699
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt.func2()
	pkg/sentry/vfs/mount.go:575 +0x32 fp=0xc0008a13d8 sp=0xc0008a13a8 pc=0x757692
runtime.deferreturn()
	GOROOT/src/runtime/panic.go:436 +0x33 fp=0xc0008a1418 sp=0xc0008a13d8 pc=0x4349d3
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).BindAt(0xc000448dd0, {0x13831b0?, 0xc000679500}, 0xc000474120?, 0xc00090aa00?, 0x7?)
	pkg/sentry/vfs/mount.go:604 +0x565 fp=0xc0008a1668 sp=0xc0008a1418 pc=0x7571c5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mount(0xc000679500, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7fd1bb876e78}})
	pkg/sentry/syscalls/linux/sys_mount.go:84 +0xa6c fp=0xc0008a1958 sp=0xc0008a1668 pc=0xac6b4c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000679500, 0xa5, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7fd1bb876e78}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0008a1c98 sp=0xc0008a1958 pc=0x9766ab
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000679500, 0x85?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7fd1bb876e78}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0008a1cf8 sp=0xc0008a1c98 pc=0x977c94
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x81018f?, 0x0?, {{0x20000240}, {0x20000280}, {0x0}, {0x2001411}, {0x0}, {0x7fd1bb876e78}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0008a1d58 sp=0xc0008a1cf8 pc=0x977885
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000164270?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0008a1e50 sp=0xc0008a1d58 pc=0x97754c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0005c2600?, 0xc000679500)
	pkg/sentry/kernel/task_run.go:253 +0x1125 fp=0xc0008a1f60 sp=0xc0008a1e50 pc=0x969465
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000679500, 0xd)
	pkg/sentry/kernel/task_run.go:94 +0x1ec fp=0xc0008a1fc0 sp=0xc0008a1f60 pc=0x967cac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:378 +0x2a fp=0xc0008a1fe0 sp=0xc0008a1fc0 pc=0x974b4a
runtime.goexit()
	src/runtime/asm_amd64.s:1571 +0x1 fp=0xc0008a1fe8 sp=0xc0008a1fe0 pc=0x4695c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:378 +0x105