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Ticket Resolution Summary Owner Reporter
#30773 fixed New bug class: Accessing rend_data/hs_ident after marking for close a circuit asn
Description

See #30771 for an example of this issue:

     circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_FINISHED);
 
     /* close any other intros launched in parallel */
    rend_client_close_other_intros(rend_data_get_pk_digest(circ->rend_data,
                                                           NULL));

It seems to be caused by a bad interaction between #29034 and #28780, plus some naughty v2 code. The v2 code marks the circuit as closed and then tries to access rend_data out of it, but because of #28780 the mark for close repurposes the circuit to a padding circuit instead, and then because #29034 we also clean its rend_data. This causes the crash.

We should make sure that this pattern is impossible in other parts of the code, so that we don't assert out again, or even worse access freed memory.

#30772 duplicate TorBrowser for Android asks for localized webpages sigil12
Description

There is no option to "ask for english version" of webpages, so it asks for localized version based on browser language. On desktop version it is possible to choose.

#30771 fixed rend_data_get_pk_digest: Assertion rend_data failed; aborting. nickm
Description

Found with chutney.

Jun 05 10:09:47.372 [info] circpad_deliver_recognized_relay_cell_events(): Got p
adding cell on origin circuit 39.
Jun 05 10:09:47.372 [info] rend_client_introduction_acked(): Received ack. Telli
ng rend circ...
Jun 05 10:09:47.372 [info] circpad_marked_circuit_for_padding(): Circuit 39 is not marked for close because of a  pending padding machine.
Jun 05 10:09:47.372 [err] tor_assertion_failed_(): Bug: src/feature/hs/hs_common.c:566: rend_data_get_pk_digest: Assertion rend_data failed; aborting. (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug: Assertion rend_data failed in rend_data_get_pk_digest at src/feature/hs/hs_common.c:566: . Stack trace: (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /lib64/libasan.so.5(+0x6ce90) [0x7f3cf5573e90] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(log_backtrace_impl+0x4d) [0x55a10e4f5e1d] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(tor_assertion_failed_+0x296) [0x55a10e4eb876] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(rend_data_get_pk_digest+0x92) [0x55a10e2dc092] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(rend_client_introduction_acked+0x2ef) [0x55a10e3790bf] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(hs_client_receive_introduce_ack+0x29e) [0x55a10e2d982e] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(rend_process_relay_cell+0x210) [0x55a10e37ead0] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(+0x29bb6e) [0x55a10e220b6e] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(circuit_receive_relay_cell+0xa3b) [0x55a10e22743b] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(command_process_cell+0x7c8) [0x55a10e1e00b8] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(channel_tls_handle_cell+0x5cf) [0x55a10e192b3f] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(+0x270964) [0x55a10e1f5964] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(connection_handle_read+0x1ac2) [0x55a10e16ed82] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
Jun 05 10:09:47.375 [err] Bug:     /home/nickm/src/tor/src/app/tor(+0x1f5b85) [0x55a10e17ab85] (on Tor 0.4.1.2-alpha 7f341d64828d48eb)
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