panic slice bounds out of range

gopacket/layers/dns.go. 632 , need boundary check

// decode decodes the resource record, returning the total length of the record.
func (rr *DNSResourceRecord) decode(data []byte, offset int, df gopacket.DecodeFeedback, buffer *[]byte) (int, error) {
name, endq, err := decodeName(data, offset, buffer, 1)
if err != nil {
return 0, err
}

rr.Name = name
rr.Type = DNSType(binary.BigEndian.Uint16(data[endq : endq+2]))
rr.Class = DNSClass(binary.BigEndian.Uint16(data[endq+2 : endq+4]))
rr.TTL = binary.BigEndian.Uint32(data[endq+4 : endq+8])
rr.DataLength = binary.BigEndian.Uint16(data[endq+8 : endq+10])
end := endq + 10 + int(rr.DataLength)
if end > len(data) {
return 0, errDecodeRecordLength
}
rr.Data = data[endq+10 : end]

if err = rr.decodeRData(data, endq+10, buffer); err != nil {
return 0, err
}

return endq + 10 + int(rr.DataLength), nil
}