Even before Michael J. Garcia, a former U.S. attorney and FIFA's chief ethics investigator into the 2018 and 2022 World Cup bids, had submitted his report to FIFA in 2014, there were rumors that there was no "smoking gun". Not of the kind that would see the World Cup taken away from the respective bid winners, Russia and Qatar.
Hans-Joachim Eckert, the head of the Adjudicatory branch of FIFA's Ethics Committee, decided in September 2014 that the Garcia Report would not be published in full for "legal reasons". Instead, he'd read it himself and provide us with a summary.