The answer to 'garbage disposal overflowing' is that the most common causes are a clogged or jammed disposal, a blockage in the drain line, or an issue with the plumbing vent. Symptoms include water backing up into the sink, a foul odor, and the disposal not working properly. Solutions may include resetting the disposal, removing a clog, or calling a professional plumber if the problem persists.
If the disposal is just jammed, you may be able to fix it yourself by turning off the power, removing any debris, and resetting the disposal. However, if the issue is a more serious blockage or plumbing problem, it's best to call a licensed plumber to properly diagnose and resolve the issue.