[tor-bugs] #33924 [Core Tor/Tor]: Tor beginning with 0.4.1 seems to ignore SIGNAL SHUTDOWN on iOS

Tue Apr 21 14:07:45 UTC 2020

#33924: Tor beginning with 0.4.1 seems to ignore SIGNAL SHUTDOWN on iOS
--------------------------+------------------------------------
 Reporter:  tla           |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:  Tor: 0.4.4.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.4.1.5
 Severity:  Major         |     Resolution:
 Keywords:  backport?     |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+------------------------------------

Comment (by tla):

 With Tor 0.4.0.6:

 {{{
 Apr 21 15:59:50.160 [notice] Tor 0.4.0.6 (git-39344e410dca1dd4) running on
 Darwin with Libevent 2.1.11-stable, OpenSSL 1.1.1f, Zlib 1.2.11, Liblzma
 5.2.5, and Libzstd N/A.

 ...

 [OnionManager] #stopTor
 [Tor debug] conn_read_callback: socket 22 wants to read.
 [Tor debug] read_to_chunk: Read 19 bytes. 19 on inbuf.
 [Tor info] Interrupt: exiting cleanly.
 Apr 21 16:00:02.000 [notice] Interrupt: exiting cleanly.
 [Tor debug] pathbias_count_circs_in_states: Found opened circuit 2 in
 path_state build succeeded
 [Tor debug] pathbias_count_circs_in_states: Found opened circuit 3 in
 path_state build succeeded
 [Tor debug] pathbias_count_circs_in_states: Found opened circuit 4 in
 path_state build succeeded
 [Tor debug] pathbias_count_circs_in_states: Found opened circuit 5 in
 path_state build succeeded
 [Tor debug] pathbias_count_circs_in_states: Found opened circuit 6 in
 path_state build succeeded
 [Tor debug] tor_rename: Renaming
 /Users/berhart/Library/Developer/CoreSimulator/Devices/9A372026-08DE-
 4A3A-B991-C22918F0CAA5/data/Containers/Data/Application/0A10C106-1A8A-4674-BB70-6487F63D37EB/Library/Caches/tor/state.tmp
 to /Users/berhart/Library/Developer/CoreSimulator/Devices/9A372026-08DE-
 4A3A-B991-C22918F0CAA5/data/Containers/Data/Application/0A10C106-1A8A-4674-BB70-6487F63D37EB/Library/Caches/tor/state
 [Tor info] or_state_save: Saved state to
 "/Users/berhart/Library/Developer/CoreSimulator/Devices/9A372026-08DE-
 4A3A-B991-C22918F0CAA5/data/Containers/Data/Application/0A10C106-1A8A-4674-BB70-6487F63D37EB/Library/Caches/tor/state"
 [Tor info] circuit_free_: Circuit 0 (id: 2) has been freed.
 [Tor info] circuit_free_: Circuit 0 (id: 6) has been freed.
 [Tor info] circuit_free_: Circuit 0 (id: 5) has been freed.
 [Tor info] circuit_free_: Circuit 0 (id: 4) has been freed.
 [Tor info] circuit_free_: Circuit 0 (id: 3) has been freed.
 [Tor debug] channel_tls_free_all: Shutting down TLS channels...
 [Tor debug] channel_tls_free_all: Done shutting down TLS channels
 [Tor debug] channel_free_all: Shutting down channels...
 [Tor debug] channel_free_list: Cleaning up channel 0x7fd7e3a2e740 (global
 ID 1) in state open (2)
 [Tor debug] channel_remove_from_digest_map: Removed channel 0x7fd7e3a2e740
 (global ID 1) from identity map in state open (2) with digest
 92173C9F108197460307969D353333DACE9B9F09
 [Tor debug] channel_mark_for_close: Closing channel 0x7fd7e3a2e740 (global
 ID 1) by request
 [Tor debug] channel_change_state_: Changing state of channel
 0x7fd7e3a2e740 (global ID 1) from "open" to "closing"
 [Tor debug] free_socket_info_by_chan: scheduler free socket info for
 chan=1
 [Tor debug] free_socket_info_by_ent: Freeing socket table entry from
 chan=1
 [Tor debug] scheduler_set_channel_state: chan 1 changed from scheduler
 state WAITING_FOR_CELLS to IDLE
 [Tor debug] connection_mark_for_close_internal_: Calling
 connection_mark_for_close_internal_() on an OR conn at
 src/core/or/connection_or.c:1623
 [Tor debug] channel_force_xfree: Force-freeing channel 1 at 0x7fd7e3a2e740
 [Tor debug] scheduler_set_channel_state: chan 1 changed from scheduler
 state IDLE to IDLE
 [Tor debug] channel_clear_remote_end: Clearing remote endpoint identity on
 channel 0x7fd7e3a2e740 with global ID 1
 [Tor debug] circuitmux_free_: Freeing cmux at 0x600003ffc050 with no
 queued destroys, the cmux destroy balance was 0, global is 0
 [Tor debug] channel_free_all: Freeing channel_identity_map
 [Tor debug] channel_free_all: Freeing channel_gid_map
 [Tor debug] channel_free_all: Done cleaning up after channels
 [Tor debug] connection_free_minimal: closing fd 15.
 [Tor debug] connection_free_minimal: closing fd 16.
 [Tor debug] connection_free_minimal: closing fd 22.
 [Tor debug] scheduler_free_all: Shutting down scheduler
 [Tor info] tor_lockfile_unlock: Unlocking
 "/Users/berhart/Library/Developer/CoreSimulator/Devices/9A372026-08DE-
 4A3A-B991-C22918F0CAA5/data/Containers/Data/Application/0A10C106-1A8A-4674-BB70-6487F63D37EB/Library/Caches/tor/lock"
 [Tor debug] subsystems_shutdown_downto: Shutting down btrack
 [Tor debug] subsystems_shutdown_downto: Shutting down ocirc_event
 [Tor debug] subsystems_shutdown_downto: Shutting down orconn_event
 [Tor debug] subsystems_shutdown_downto: Shutting down process
 [Tor debug] subsystems_shutdown_downto: Shutting down crypto
 [Tor debug] subsystems_shutdown_downto: Shutting down network
 [Tor debug] subsystems_shutdown_downto: Shutting down log

 -> End
 }}}

 With Tor 0.4.2.7:

 {{{
 Apr 21 16:03:53.161 [notice] Tor 0.4.2.7 (git-74cad14699087b7e) running on
 Darwin with Libevent 2.1.11-stable, OpenSSL 1.1.1f, Zlib 1.2.11, Liblzma
 5.2.5, and Libzstd N/A.

 ...

 [OnionManager] #stopTor
 [Tor debug] conn_read_callback: socket 22 wants to read.
 [Tor debug] read_to_chunk: Read 19 bytes. 19 on inbuf.
 [Tor debug] conn_write_callback: socket 22 wants to write.
 [Tor debug] conn_read_callback: socket 22 wants to read.
 [Tor debug] read_to_chunk: Encountered eof on fd 22
 [Tor info] connection_control_reached_eof: Control connection reached EOF.
 Closing.
 [Tor debug] conn_close_if_marked: Cleaning up connection (fd 22).
 [Tor debug] connection_remove: removing socket 22 (type Control), n_conns
 now 4
 [Tor debug] connection_free_minimal: closing fd 22.

 ...
 (and then: normal Tor operation continued)
 }}}

 Otherwise everything the same: Same libs, same way of calling signal
 shutdown. Upper-/lowercase makes no difference, also arguments,

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33924#comment:10>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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