If person has to pass air but keeps it in because of him being in salah but then feels a bubble or a very small quantity of air has passed which dose not give off smell or dose not feel like the normal passing of air. Dose this person invalidates his salah or abolition and must he repeat all the salah made in such condition.
If one is sure of passing air his wuzu will be nullified. If one passed air during salah he can continue from the same point after renewing his wuzu, but it is better to re-perform the salah afresh.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband