[tor-bugs] #21007 [Core Tor/Tor]: guard: circuit_send_next_onion_skin(): Bug: 3-hop circuit <ptr> with purpose 18 has no guard state

[Tor Bug Tracker & Wiki]

#21007: guard: circuit_send_next_onion_skin(): Bug: 3-hop circuit <ptr> with
purpose 18 has no guard state
--------------------------+------------------------------------
 Reporter:  dgoulet       |          Owner:  nickm
     Type:  defect        |         Status:  closed
 Priority:  High          |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:  fixed
 Keywords:  tor-guard     |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+------------------------------------

Comment (by toralf):

 This happened immediately after I rebooted into new Gentoo hardened kernel
 4.9.10 (was 4.9.9 before) today :
 {{{
 mr-fox ~ # cat /tmp/notice.log
 Feb 18 17:09:11.000 [notice] Tor 0.3.0.3-alpha (git-bb2ea3642d54ff03)
 opening new log file.
 Feb 18 17:09:11.000 [notice] Parsing GEOIP IPv4 file /usr/share/tor/geoip.
 Feb 18 17:09:12.000 [notice] Parsing GEOIP IPv6 file
 /usr/share/tor/geoip6.
 Feb 18 17:09:12.000 [notice] Configured to measure statistics. Look for
 the *-stats files that will first be written to the data directory in 24
 hours from now.
 Feb 18 17:09:12.000 [notice] We were built to run on a 64-bit CPU, with
 OpenSSL 1.0.1 or later, but with a version of OpenSSL that apparently
 lacks accelerated support for the NIST P-224 and P-256 groups. Building
 openssl with such support (using the enable-ec_nistp_64_gcc_128 option
 when configuring it) would make ECDH much faster.
 Feb 18 17:09:12.000 [notice] Your Tor server's identity key fingerprint is
 'zwiebeltoralf 1AF72E8906E6C49481A791A6F8F84F8DFEBBB2BA'
 Feb 18 17:09:12.000 [notice] Bootstrapped 0%: Starting
 Feb 18 17:09:26.000 [notice] Starting with guard context "default"
 Feb 18 17:09:26.000 [notice] Bootstrapped 80%: Connecting to the Tor
 network
 Feb 18 17:09:26.000 [notice] Self-testing indicates your ORPort is
 reachable from the outside. Excellent.
 Feb 18 17:09:27.000 [notice] Bootstrapped 85%: Finishing handshake with
 first hop
 Feb 18 17:09:27.000 [notice] Bootstrapped 90%: Establishing a Tor circuit
 Feb 18 17:09:27.000 [notice] Tor has successfully opened a circuit. Looks
 like client functionality is working.
 Feb 18 17:09:27.000 [notice] Bootstrapped 100%: Done
 Feb 18 17:10:26.000 [notice] Self-testing indicates your DirPort is
 reachable from the outside. Excellent. Publishing server descriptor.
 Feb 18 17:10:27.000 [notice] Performing bandwidth self-test...done.
 Feb 18 17:10:30.000 [warn] circuit_send_next_onion_skin(): Bug: 3-hop
 circuit 0x485494c780 with purpose 13 has no guard state (on Tor
 0.3.0.3-alpha bb2ea3642d54ff03)
 Feb 18 17:39:00.000 [notice] New control connection opened from 127.0.0.1.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21007#comment:7>
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