The backrower has withdrawn a transfer request which was handed in earlier this year.
“I am really happy to be staying at this club,” said Hock.
“When I signed a long-term deal at the start of 2014 it was never my intention to be seeking a move within 12 months but I had been through what was a frustrating time for me personally when I experienced my recent suspension from the game, and I began to feel that I needed a change of environment.
“I realise I upset a fair few people and I can only apologise to them and say that I firmly intend to make things right next season.
“The fans haven’t yet seen the best of me so now I have to get back to work and head into pre-season and get ready for what should be an exciting 2015 for the Red Devils.
“I did have offers to play elsewhere in Super League and in rugby union but I now appreciate what a truly good club the Red Devils are and I’m sure we are going to have a big year next year.
“I was also grateful throughout my time away from the club for the support and commitment made to me by the owner Marwan Koukash and coach Iestyn Harris who were a major part in my decision to withdraw my transfer request.”
Salford owner Dr Marwan Koukash is pleased that the former England international is staying put at the AJ Bell Stadium.
“It has been good talking to Gaz and getting to the bottom of his issues here,” said Koukash.
“It’s fair to say if you want a quiet life you probably don’t sign players like Gareth Hock and bring them into your team, but we don’t want a quiet life at the Red Devils, we want trophies and on his day Gareth is one of the best forwards in the world.
“Now he will remain with us it is up to Iestyn Harris and his coaches to make sure he has one of those best days every time he plays.”