[tor-bugs] #13513 [Tor]: Tor randomly hangs

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#13513: Tor randomly hangs
-------------------------+--------------------------------
     Reporter:  Giova84  |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  Tor: 0.2.6.x-final
    Component:  Tor      |    Version:  Tor: 0.2.3.25
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
-------------------------+--------------------------------

Comment (by Giova84):

 Here we go again: TOR is stuck again, but after all these days: initially
 it seemed stable. Today i have seen the same behaviour: it randomly hangs,
 while occupying the whole cpu process. This is happened again without any
 client connected to TOR. In these days i have used TOR with a client and
 also left in standby, and all was fine, except for today.
 The output log was similar to the previous:
 http://pastebin.com/dEhtucMm

 It ends with this repeated message:


 {{{
 Oct 27 16:03:19.000 [debug] conn_read_callback(): socket 17 wants to read.
 Oct 27 16:03:19.000 [debug] tor_tls_handshake(): About to call SSL_connect
 on 0x19344fe8 (SSLv2/v3 read server hello A)
 Oct 27 16:03:19.000 [debug] tor_tls_debug_state_callback(): SSL 0x1a60f890
 is now in state SSLv2/v3 read server hello A [type=4098,val=-1].
 Oct 27 16:03:19.000 [debug] connection_tls_continue_handshake(): wanted
 read
 Oct 27 16:03:19.000 [debug] conn_read_callback(): socket 17 wants to read.
 Oct 27 16:03:19.000 [debug] tor_tls_handshake(): About to call SSL_connect
 on 0x19344fe8 (SSLv2/v3 read server hello A)
 Oct 27 16:03:19.000 [debug] tor_tls_debug_state_callback(): SSL 0x1a60f890
 is now in state SSLv2/v3 read server hello A [type=4098,val=-1].
 Oct 27 16:03:19.000 [debug] connection_tls_continue_handshake(): wanted
 read
 Oct 27 16:03:19.000 [debug] conn_read_callback(): socket 17 wants to read.
 Oct 27 16:03:19.000 [debug] tor_tls_handshake(): About to call SSL_connect
 on 0x19344fe8 (SSLv2/v3 read server hello A)
 Oct 27 16:03:19.000 [debug] tor_tls_debug_state_callback(): SSL 0x1a60f890
 is now in state SSLv2/v3 read server hello A [type=4098,val=-1].
 Oct 27 16:03:19.000 [debug] connection_tls_continue_handshake(): wanted
 read
 Oct 27 16:03:19.000 [debug] conn_read_callback(): socket 17 wants to read.
 }}}

 If i don't kill TOR, the debug file, as before, will grow without limits.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13513#comment:3>
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