Sony Cancels Studio Tour ... Until Further Notice

Sony is telling people who signed up for their studio tour to take a walk ... anywhere but on the Sony lot.

Sources at the studio tell TMZ ... their tour has been put on ice since the hacker attack ... and a big reason is that its 2 hour walking could pose a big threat to Sony. The tour is touted as a behind the scenes look at a working studio. The idea of someone straying from the group is too real a possibility.