I just setup an osrm server on an Ubuntu 12.04, and while testing the server I accidentally typed in http://192.168.1.104:5000/viaroute?alt=false
hint=uWAIKuc7AwARAAAA____f_mtwRV7x-8_-Ami_scKbf0
instructions=false
jsonp=OSRM.JSONP.callbacks.dragging
loc=-22.935048,-43.185465
loc=-22.902743,-43.176613
output=json

(I actually pasted it from clipboard, with the line breaks), and it killed the process. I tested it on the official osrm router (http://router.project-osrm.org/viaroute?...), the request took a while to execute, but it returned a 502 bad gateway after a few seconds, and the server also returned 502 for normal requests, on a separate tab that I opened, for about 8 seconds, and then returned to normal.