After scoring only one goal in their first four games at Madison Square Garden this season, the Rangers finally got their offense on track on home ice Thursday night.

This time their defense let them down.

The Rangers’ Taylor Raddysh scored his second career hat trick to match one by San Jose’s Macklin Celebrini, but another young San Jose star, Will Smith, blasted home the game-winning goal at 1:38 of overtime as San Jose earned its first win of the season, 6-5 , and leaving the Rangers oh-for-October at the Garden.

Smith, who had two goals and two assists, one-timed a pass from Celebrini (three goals, two assists) and beat Igor Shesterkin upstairs for the winner.

“That’s pretty poor out of us, and not the way we want to play hockey,’’ Adam Fox said. “So there’s really not much to

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