Eved:
I find your comment shocking. Your mashgiach told you clearly that smoking is ossur d’Oraysa. You then run to ask the Rosh Yeshiva? Really? If that is your relationship to talmidei chachomim, you seem to want to pick and choose. You distrust the mashgiach?
Why are you even asking? You were given a hora’ah. Oh, you’re addicted to tobacco. That permits trashing the psak from the mashgiach. That’s your problem. Your personal drives and desires are allowed to shape your adherence to halacha. Such a shame to adopt a derech like this. It flaunts your personal taavos as priorities over Torah and Halacha. And you are a yeshiva bochur?