[tor-bugs] #2367 [Tor Relay]: Torrc parser crashing for long ExitPolicy lists

[Tor Bug Tracker & Wiki]

#2367: Torrc parser crashing for long ExitPolicy lists
---------------------------+------------------------------------------------
 Reporter:  hellais        |        Type:  defect   
   Status:  new            |    Priority:  normal   
Milestone:                 |   Component:  Tor Relay
  Version:  Tor: 0.2.1.26  |    Keywords:           
   Parent:                 |  
---------------------------+------------------------------------------------
 While running tor as a relay and having a long (300 lines) list of
 ExitPolicy directives in the torrc file I get the following error:
 Jan 09 19:12:55.541 [warn] router_dump_router_to_string(): Bug: descriptor
 policy_write_item ran out of room!
 Jan 09 19:12:55.541 [warn] router_rebuild_descriptor(): Bug: Couldn't
 generate router descriptor.

 And Tor will not start.

 Steps to reproduce:

 * Add 200-300 lines of ExitPolicy directives
 for example:

 ExitPolicy reject 217.169.96.0/20:*, reject 217.169.112.0/20:*, reject
 217.170.224.0/20:*
 ExitPolicy reject 217.171.32.0/20:*, reject 217.171.160.0/20:*, reject
 217.172.0.0/20:*
 ExitPolicy reject 217.172.192.0/19:*, reject 217.174.112.0/20:*, reject
 217.174.128.0/20:*
 ...

 * Start tor
 * cat /var/log/tor/log
 Jan 09 19:12:00.938 [warn] router_dump_router_to_string(): Bug: descriptor
 policy_write_item ran out of room!
 Jan 09 19:12:00.938 [warn] router_rebuild_descriptor(): Bug: Couldn't
 generate router descriptor.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2367>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online