As you quoated Indian Succession act is 1925., where as the Hindu succession act with amentment 2005. given below
"Hindu Succession Act, 2005 has finally abolished the doctrine of son’s pious obligation and now the son cannot be made to discharge the debts of his father solely on the basis of his religious obligation. Thus now the liability of the children to discharge debts of their father extends only to the extent of the assets inherited by them. The children cannot be made to pay the debts out of their personal assets."
as per the above said Law, the liablity of the son is restricted to the value of property which he Inherits.