[tor-bugs] #31136 [Core Tor/Tor]: tor_bug_occurred_() channel_tls_handle_cell: This line should not have been reached.

[Tor Bug Tracker & Wiki]

#31136: tor_bug_occurred_() channel_tls_handle_cell: This line should not have been
reached.
------------------------------------+------------------------------
 Reporter:  fingau                  |          Owner:  (none)
     Type:  defect                  |         Status:  new
 Priority:  Medium                  |      Component:  Core Tor/Tor
  Version:  Tor: 0.3.5.8            |       Severity:  Normal
 Keywords:  tor-relay, tor-channel  |  Actual Points:
Parent ID:  #31107                  |         Points:
 Reviewer:                          |        Sponsor:
------------------------------------+------------------------------
 OS:
 Distributor ID: Ubuntu
 Description:    Ubuntu 18.04.2 LTS
 Release:        18.04
 Codename:       bionic

 Relay fingerprint:
 C8F402FDF89E5B51D862AD68D8C17DFA5A371BA0

 The log:
 Jul 10 16:15:55.000 [notice] Heartbeat: Tor's uptime is 6:00 hours, with
 5886 circuits open. I've sent 86.93 GB and received 86.12 GB.
 Jul 10 16:15:55.000 [notice] Circuit handshake stats since last time:
 9041/9041 TAP, 174017/174017 NTor.
 Jul 10 16:15:55.000 [notice] Since startup we initiated 0 and received 122
 v1 connections; initiated 0 and received 434 v2 connections; initiated 0
 and received 784 v3 connections; initiated 2816 and received 9410 v4
 connections; initiated 5175 and received 8815 v5 connections.
 Jul 10 16:15:55.000 [notice] DoS mitigation since startup: 0 circuits
 killed with too many cells. 0 circuits rejected, 0 marked addresses. 0
 connections closed. 6 single hop clients refused.
 Jul 10 21:12:34.000 [warn] tor_bug_occurred_(): Bug:
 ../src/core/or/channeltls.c:1111: channel_tls_handle_cell: This line
 should not have been reached. (Future instances of this warning will be
 silenced.) (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug: Line unexpectedly reached at
 channel_tls_handle_cell at ../src/core/or/channeltls.c:1111. Stack trace:
 (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(log_backtrace_impl+0x45)
 [0x55d26b5fd995] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(tor_bug_occurred_+0xc0)
 [0x55d26b5f9040] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:
 /usr/bin/tor(channel_tls_handle_cell+0x3da) [0x55d26b4855da] (on Tor
 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(+0x9c20c)
 [0x55d26b4a920c] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:
 /usr/bin/tor(connection_handle_read+0x9bd) [0x55d26b472f7d] (on Tor
 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(+0x6bdae)
 [0x55d26b478dae] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/lib/x86_64-linux-
 gnu/libevent-2.1.so.6(+0x1e8f8) [0x7f887bf338f8] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/lib/x86_64-linux-
 gnu/libevent-2.1.so.6(event_base_loop+0x53f) [0x7f887bf3433f] (on Tor
 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(do_main_loop+0xb9)
 [0x55d26b47a1c9] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(tor_run_main+0x128d)
 [0x55d26b46803d] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(tor_main+0x3a)
 [0x55d26b4650fa] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(main+0x19)
 [0x55d26b464c89] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /lib/x86_64-linux-
 gnu/libc.so.6(__libc_start_main+0xe7) [0x7f887a65cb97] (on Tor 0.3.5.8 )
 Jul 10 21:12:34.000 [warn] Bug:     /usr/bin/tor(_start+0x2a)
 [0x55d26b464cda] (on Tor 0.3.5.8 )
 Jul 10 22:15:55.000 [notice] Heartbeat: Tor's uptime is 12:00 hours, with
 6319 circuits open. I've sent 220.48 GB and received 218.85 GB.
 Jul 10 22:15:55.000 [notice] Circuit handshake stats since last time:
 10090/10090 TAP, 208653/208653 NTor.
 Jul 10 22:15:55.000 [notice] Since startup we initiated 0 and received 326
 v1 connections; initiated 0 and received 1088 v2 connections; initiated 0
 and received 1909 v3 connections; initiated 5587 and received 24432 v4
 connections; initiated 8005 and received 17206 v5 connections.
 Jul 10 22:15:55.000 [notice] DoS mitigation since startup: 0 circuits
 killed with too many cells. 0 circuits rejected, 0 marked addresses. 0
 connections closed. 10 single hop clients refused.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31136>
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