The short answer is yes, you could die from smoking too much opium, especially if you mix it with alcohol or benzos.
However, smoking is the safest (short term) method of ingestion, as it hits you really fast, and you can only smoke a lungful at a time. So if you've smoked enough to make you high, you can quickly realise this and stop.
Buy if you have a low tolerance, get especially strong opium, and were to smoke quite quickly, you could overdose like with any other opiate.
If you're inexperienced, smoke slowly, waiting a few minutes between small puffs, and never mix with alcohol or anything else that depressed breathing.
Lucky you if you have pure opium.