Answer
(Fatwa: 521/512/N=1434)
Such types of customs and traditions do not exist in Islam. Hence if these rituals are performed as a part of religion then it shall be unlawful and innovation (bid’ah). But if they are not considered a part of religion but they include non-Shariah things then too they shall be unlawful. These ongoing Chilla and Chatti etc contain non-Shariah elements; hence it should be avoided.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband