This is partially caused by the doubled shingles or Ice dam retarder at roof edges. No, repairs are not required, unless excessive deflection is noted at the roof rafters. Meaning, if rafters were set crown down and all are sagging indicating poor framing practices then, installation of a knee wall at attic would be recommended.
How old is the home. If 20+ years the framing would not comply with today's standards but if holding loads properly there is not a problem.
Did you walk on it. Was there bounce in the structure. Were you afraid for your life. If yes, there is a problem. If No, Typical 1970's roof framing.