Language: Go
Label: vulnerable
CWE: CWE-400 \u2014 Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Code:
func (s *shard) bitmap() []byte {
	bm := bitfield.NewBitfield(s.size)
	for i := 0; i < s.size; i++ {
		if _, ok := s.children[i]; ok {
			bm.SetBit(i)
		}
	}
	return bm.Bytes()
}