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[tor-bugs] #32841 [Core Tor/Tor]: sandbox error on 0.4.2.x



#32841: sandbox error on 0.4.2.x
------------------------------+--------------------------------
     Reporter:  weasel        |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  High          |  Milestone:  Tor: 0.4.2.x-final
    Component:  Core Tor/Tor  |    Version:  Tor: 0.4.2.5
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------------
 0.4.2.x has (apparently introduced) a sandbox issue.  This did not happen
 on 0.4.1.6 before.

 Currently it seems to happen every time at midnight (the hup might come
 from logrotate)

 {{{
 Dec 17 23:55:04.000 [notice] Uploaded signature(s) to dirserver
 171.25.193.9:443
 Dec 17 23:57:30.000 [notice] Time to fetch any signatures that we're
 missing.
 Dec 18 00:00:00.000 [notice] Time to publish the consensus and discard old
 votes
 Dec 18 00:00:00.000 [notice] Published ns consensus
 Dec 18 00:00:01.000 [notice] Published microdesc consensus
 Dec 18 00:00:04.000 [notice] Received reload signal (hup). Reloading
 config and resetting internal state.
 Dec 18 00:00:04.000 [notice] Read configuration file "/usr/share/tor/tor-
 service-defaults-torrc".
 Dec 18 00:00:04.000 [notice] Read configuration file "/etc/tor/torrc".

 ============================================================ T= 1576627205
 (Sandbox) Caught a bad syscall attempt (syscall dup)
 /usr/bin/tor(+0x1fc9fa)[0x565130b7a9fa]
 /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f46a89a0bc7]
 /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f46a89a0bc7]
 /usr/bin/tor(tor_log_update_sigsafe_err_fds+0x18b)[0x565130b8e99b]
 /usr/bin/tor(set_options+0x3c0)[0x565130b0af80]
 /usr/bin/tor(options_init_from_string+0x17d)[0x565130b0d3dd]
 /usr/bin/tor(options_init_from_torrc+0x404)[0x565130b0da74]
 /usr/bin/tor(+0x5f961)[0x5651309dd961]
 /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(+0x22a6c)[0x7f46a8ff8a6c]
 /usr/lib/x86_64-linux-
 gnu/libevent-2.1.so.6(event_base_loop+0x5a7)[0x7f46a8ff9537]
 /usr/bin/tor(do_main_loop+0xff)[0x5651309f23af]
 /usr/bin/tor(tor_run_main+0x1105)[0x5651309dfd55]
 /usr/bin/tor(tor_main+0x3a)[0x5651309dd23a]
 /usr/bin/tor(main+0x19)[0x5651309dcdf9]
 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f46a88da09b]
 /usr/bin/tor(_start+0x2a)[0x5651309dce4a]
 }}}

 and

 {{{
 Dec 20 00:00:00.000 [notice] Published microdesc consensus
 Dec 20 00:00:05.000 [notice] Received reload signal (hup). Reloading
 config and resetting internal state.
 Dec 20 00:00:05.000 [notice] Read configuration file "/usr/share/tor/tor-
 service-defaults-torrc".
 Dec 20 00:00:05.000 [notice] Read configuration file "/etc/tor/torrc".

 ============================================================ T= 1576800005
 (Sandbox) Caught a bad syscall attempt (syscall dup)
 /usr/bin/tor(+0x1fc9fa)[0x55ffd52439fa]
 /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7fcb63423bc7]
 /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7fcb63423bc7]
 /usr/bin/tor(tor_log_update_sigsafe_err_fds+0x18b)[0x55ffd525799b]
 /usr/bin/tor(set_options+0x3c0)[0x55ffd51d3f80]
 /usr/bin/tor(options_init_from_string+0x17d)[0x55ffd51d63dd]
 /usr/bin/tor(options_init_from_torrc+0x404)[0x55ffd51d6a74]
 /usr/bin/tor(+0x5f961)[0x55ffd50a6961]
 /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(+0x22a6c)[0x7fcb63a7ba6c]
 /usr/lib/x86_64-linux-
 gnu/libevent-2.1.so.6(event_base_loop+0x5a7)[0x7fcb63a7c537]
 /usr/bin/tor(do_main_loop+0xff)[0x55ffd50bb3af]
 /usr/bin/tor(tor_run_main+0x1105)[0x55ffd50a8d55]
 /usr/bin/tor(tor_main+0x3a)[0x55ffd50a623a]
 /usr/bin/tor(main+0x19)[0x55ffd50a5df9]
 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7fcb6335d09b]
 /usr/bin/tor(_start+0x2a)[0x55ffd50a5e4a]
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32841>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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