rear brakes smell like ish!

this was happening before i changed my brake pads and rotors… but once in a whlie i would smell this really bad burning smell… like burned toilet paper… and it would come from the back of my car… i inspected more and the smell is comign from my right and left brakes/tires… anyone know why this could be happening? could it be because i adjusted my ebrake a little too tite? this started coincidentally happening around the time after i adjusted my e brake… thanks.