[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [tor-bugs] #16585 [Tor]: relay stops forwarding all traffic when client function cannot establish circuits -- scheduler_run() starvation
#16585: relay stops forwarding all traffic when client function cannot establish
circuits -- scheduler_run() starvation
---------------------------+--------------------------------
Reporter: starlight | Owner:
Type: defect | Status: new
Priority: major | Milestone: Tor: 0.2.7.x-final
Component: Tor | Version: Tor: 0.2.6.10
Resolution: | Keywords: PostFreeze027
Actual Points: | Parent ID:
Points: |
---------------------------+--------------------------------
Comment (by starlight):
Replying to [comment:14 mikeperry]:
> What if there are more sources of this type of side-channel caused by
other slow and/or sensitive operations? Perhaps the actual channel
send+recv handling is what should be done in a worker thread, rather than
as a scheduled event, to avoid leaking any such side-channel in such an
obvious way to the wire.
This seems a good solution to me. Have cell-forwarding run in a dedicated
thread separate from all the various other transaction types. Perhaps is
not overly difficult since most everything runs as libevent transactions.
A separate libevent thread for cell forwarding with brief-hold locks to
protect cell queues could perhaps be the structure.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16585#comment:15>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
_______________________________________________
tor-bugs mailing list
tor-bugs@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs