[tor-bugs] #25223 [Core Tor/Tor]: dos: dos_new_client_conn: Non-fatal assertion !(entry == NULL) failed

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#25223: dos: dos_new_client_conn: Non-fatal assertion !(entry == NULL) failed
------------------------------+--------------------------------
     Reporter:  dgoulet       |      Owner:  dgoulet
         Type:  defect        |     Status:  assigned
     Priority:  High          |  Milestone:  Tor: 0.3.3.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  tor-dos, tor-relay
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------------
 I just got this report from a relay operator who got this on
 tor-0.3.3.2-alpha but that relay is an obfs4 bridge! DoS mitigation is not
 suppose to be running on bridges for now...

 {{{
 Feb 12 18:14:55.000 [notice] Tor 0.3.3.2-alpha (git-7b1d356bdb76607d)
 opening log file.
 Feb 12 18:47:09.000 [warn] tor_bug_occurred_(): Bug: ../src/or/dos.c:679:
 dos_new_client_conn: Non-fatal assertion !(entry == NULL) failed. (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug: Non-fatal assertion !(entry == NULL)
 failed in dos_new_client_conn at ../src/or/dos.c:679. Stack trace: (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(log_backtrace+0x44)
 [0x55e0314a7de4] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(tor_bug_occurred_+0xb9)
 [0x55e0314c3479] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:
 /usr/bin/tor(channel_do_open_actions+0x1de) [0x55e0313e933e] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:
 /usr/bin/tor(channel_change_state_open+0x2a) [0x55e0313e93ba] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:
 /usr/bin/tor(channel_tls_handle_state_change_on_orconn+0x102)
 [0x55e0313ee2f2] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:
 /usr/bin/tor(connection_or_set_state_open+0x22) [0x55e031437872] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:
 /usr/bin/tor(channel_tls_handle_cell+0x185) [0x55e0313ee535] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(+0x115a01)
 [0x55e031434a01] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(+0x10c52e)
 [0x55e03142b52e] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(+0x537ae)
 [0x55e0313727ae] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/lib/x86_64-linux-
 gnu/libevent-2.0.so.5(event_base_loop+0x6a0) [0x7f6f4e6c55a0] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(do_main_loop+0x2bc)
 [0x55e03137381c] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(tor_run_main+0x275)
 [0x55e031374f25] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(tor_main+0x3a)
 [0x55e03136e36a] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(main+0x19)
 [0x55e03136e0d9] (on Tor 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /lib/x86_64-linux-
 gnu/libc.so.6(__libc_start_main+0xf1) [0x7f6f4cc9f2b1] (on Tor
 0.3.3.2-alpha )
 Feb 12 18:47:09.000 [warn] Bug:     /usr/bin/tor(_start+0x2a)
 [0x55e03136e12a] (on Tor 0.3.3.2-alpha )
 Feb 12 18:59:37.000 [warn] Onion service connection to [scrubbed] failed
 (connection refused)
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25223>
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