As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE EICAS WARNING MESSAGE ON EICAS TURNING FINAL INTO DFW. DECLARED EMERGENCY. BOTH FA'S SMELLED CIGARETTE SMOKE. LAV FIRE BOTTLE DID NOT EXTINGUISH. C/A: OPERATED LAV SMOKE TEST, IAW AMM 26-14-01. OPERATIONS CHECK GOOD. POSSIBLE PASSENGER SMOKING IN AFT LAV.