[tor-bugs] #20630 [Core Tor/Tor]: tor_fragile_assert hit in connection_ap_handshake_rewrite_and_attach

[Tor Bug Tracker & Wiki]

#20630: tor_fragile_assert hit in connection_ap_handshake_rewrite_and_attach
------------------------------+-----------------
     Reporter:  arma          |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+-----------------
 {{{
 Nov 10 16:45:46.971 [warn] tor_bug_occurred_(): Bug:
 src/or/connection_edge.c:1775: connection_ap_handshake_rewrite_and_attach:
 This line should not have been reached. (Future instances of this warning
 will be silenced.) (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug: Line unexpectedly reached at
 connection_ap_handshake_rewrite_and_attach at
 src/or/connection_edge.c:1775. Stack trace: (on Tor 0.3.0.0-alpha-dev
 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(log_backtrace+0x42)
 [0x7fbee4aed262] (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(tor_bug_occurred_+0xb7)
 [0x7fbee4b05e67] (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:
 src/or/tor(connection_ap_handshake_rewrite_and_attach+0xe3a)
 [0x7fbee4a9cf8a] (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:
 src/or/tor(connection_edge_process_inbuf+0x1d0) [0x7fbee4a9d9c0] (on Tor
 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(+0xfbbb8) [0x7fbee4a95bb8]
 (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(+0x457b1) [0x7fbee49df7b1]
 (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     /usr/lib/x86_64-linux-
 gnu/libevent-2.0.so.5(event_base_loop+0x7fc) [0x7fbee40233dc] (on Tor
 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(do_main_loop+0x234)
 [0x7fbee49e0834] (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(tor_main+0x1c25)
 [0x7fbee49e3f85] (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(main+0x19) [0x7fbee49dc119]
 (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     /lib/x86_64-linux-
 gnu/libc.so.6(__libc_start_main+0xf5) [0x7fbee2ff4b45] (on Tor 0.3.0.0
 -alpha-dev 0980787f91cfc420)
 Nov 10 16:45:46.972 [warn] Bug:     src/or/tor(+0x42169) [0x7fbee49dc169]
 (on Tor 0.3.0.0-alpha-dev 0980787f91cfc420)
 }}}

 See #20494 for something related but apparently not the same.

 Repeatably triggerable by "torify wget seul.org".

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20630>
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