They do look odd but I can't see it's in the camera if the marks can be cleaned off. Also they don't look very straight so I think it's most likely something at the lab although you could try a B&W film in the camera to double check.
In a dip and dunk processor the films would be hung over hooks, film base inwards and then dunked in the chemicals so only the emulsion would be damaged by coming into contact with the sides of the tanks. The base side could, I suppose, pick up debris off dirty hangers but if the lab were any good they'd have noticed it. Were the films cut and sleeved? If so, some sleevers have a wheeled transport which, if dirty, could put marks like that on and I doubt the lab would notice as they probably don't check the films at that stage.