[tor-bugs] #3213 [Tor Bridge]: seg fault in 0.2.2.26-beta when adding bridges

Tor Bug Tracker & Wiki torproject-admin at torproject.org
Tue May 17 23:36:15 UTC 2011


#3213: seg fault in 0.2.2.26-beta when adding bridges
------------------------+---------------------------------------------------
 Reporter:  arma        |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  major       |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Bridge  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------
 First start your Tor client, without bridges configured.

 Then connect to the control port, and
 authenticate
 setconf bridge=1 usebridge=128.31.0.34:9101

 Then wait until your Tor fetches moria1's descriptor
 {{{
 May 17 19:32:47.352 [notice] no known bridge descriptors running yet;
 stalling
 May 17 19:32:47.352 [notice] Our directory information is no longer up-to-
 date enough to build circuits: No live bridge descriptors.
 May 17 19:33:34.711 [notice] Learned fingerprint
 9695DFC35FFEB861329B9F1AB04C46397020CE31 for bridge 128.31.0.34:9101
 May 17 19:33:35.054 [notice] new bridge descriptor 'moria1' (fresh)
 May 17 19:33:35.057 [notice] We now have enough directory information to
 build circuits.
 }}}

 Soon after, it will refetch a general-purpose descriptor for moria1 (see
 #1776 I think):
 {{{
 May 17 19:33:45.651 [notice] no known bridge descriptors running yet;
 stalling
 May 17 19:33:45.651 [notice] Our directory information is no longer up-to-
 date enough to build circuits: No live bridge descriptors.
 May 17 19:33:45.651 [notice] I learned some more directory information,
 but not enough to build a circuit: No live bridge descriptors.
 }}}

 Then setconf usebridge=0
 {{{
 Segmentation fault (core dumped)
 }}}

 {{{
 #0  tor_memeq (a=<value optimized out>, b=<value optimized out>,
     sz=<value optimized out>) at di_ops.c:104
 #1  0x00000000004548f3 in get_configured_bridge_by_addr_port_digest (
     addr=0x7fff880414a0, port=9101, digest=0x0) at circuitbuild.c:4542
 #2  0x000000000045db18 in bridge_add_from_config (addr=0x7fff880414a0,
     port=<value optimized out>, digest=0x0) at circuitbuild.c:4593
 #3  0x0000000000468770 in parse_bridge_line (line=<value optimized out>,
     validate_only=<value optimized out>) at config.c:4446
 #4  0x000000000046e2f2 in options_act (new_val=<value optimized out>,
     msg=0x7fff88041690) at config.c:1184
 #5  set_options (new_val=<value optimized out>, msg=0x7fff88041690)
     at config.c:667
 #6  0x00000000004704eb in options_trial_assign (list=0x2057cc0,
     use_defaults=0, clear_first=1, msg=0x7fff88041690) at config.c:2251
 #7  0x000000000048630f in control_setconf_helper (conn=0x202cad0,
     len=<value optimized out>, body=<value optimized out>, use_defaults=0)
     at control.c:760
 #8  0x0000000000489a90 in handle_control_resetconf (
     conn=<value optimized out>) at control.c:807
 #9  connection_control_process_inbuf (conn=<value optimized out>)
     at control.c:3005
 #10 0x0000000000476d89 in connection_handle_read_impl (conn=0x202cad0)
     at connection.c:2510
 #11 connection_handle_read (conn=0x202cad0) at connection.c:2550
 #12 0x000000000040a156 in conn_read_callback (fd=<value optimized out>,
     event=<value optimized out>, _conn=0x202cad0) at main.c:514
 #13 0x00007f182cd84344 in event_base_loop () from
 /usr/lib/libevent-1.4.so.2
 #14 0x000000000040aea1 in do_main_loop () at main.c:1559
 #15 0x000000000040c18b in tor_main (argc=<value optimized out>,
     argv=0x7fff88041af8) at main.c:2221
 #16 0x00007f182c000c4d in __libc_start_main () from /lib/libc.so.6
 #17 0x0000000000407af9 in _start ()
 }}}

 {{{
 (gdb) up
 #1  0x00000000004548f3 in get_configured_bridge_by_addr_port_digest (
     addr=0x7fff880414a0, port=9101, digest=0x0) at circuitbuild.c:4542
 4542          if (tor_memeq(bridge->identity, digest, DIGEST_LEN))
 }}}

 digest is null

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3213>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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