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Re: [tor-bugs] #27841 [Core Tor/Tor]: Surprise race: Intro point closes circuit after NACK, at the same time as client tries to extend circuit to new intro point (was: Close intro circuit after introduction has been completed)
#27841: Surprise race: Intro point closes circuit after NACK, at the same time as
client tries to extend circuit to new intro point
--------------------------+------------------------------------
Reporter: asn | Owner: neel
Type: defect | Status: merge_ready
Priority: Medium | Milestone: Tor: 0.3.5.x-final
Component: Core Tor/Tor | Version:
Severity: Normal | Resolution:
Keywords: tor-hs dos | Actual Points:
Parent ID: | Points:
Reviewer: dgoulet | Sponsor:
--------------------------+------------------------------------
Changes (by arma):
* keywords: tor-hs dos 033-backport, 034-backport => tor-hs dos
* milestone: Tor: 0.3.4.x-final => Tor: 0.3.5.x-final
Comment:
Also agreed, no need to backport before 0.3.5.
This is a pretty important fix for v3 onion services, because in 0.3.4.x,
if you try an intro point and it has rotated away, then simultaneously (a)
you will try to extend that intro circuit to the next intro point, and (b)
the first one will start tearing down the circuit. I could easily believe
that the client doesn't handle it well and waits for something to time out
before launching a new one.
I'm going to retitle the ticket to be what we actually did. And I'm going
to go back in time and change this entry in the ChangeLog to be a major
bugfix, so it will be noted that way in the 0.3.5 ReleaseNotes.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27841#comment:23>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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