[tor-bugs] #19006 [Core Tor/Tor]: Pointer corruption and other failures in master and maint-0.2.8

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#19006: Pointer corruption and other failures in master and maint-0.2.8
------------------------------+------------------------------------------
     Reporter:  teor          |      Owner:
         Type:  defect        |     Status:  new
     Priority:  High          |  Milestone:  Tor: 0.2.8.x-final
    Component:  Core Tor/Tor  |    Version:  Tor: 0.2.8.2-alpha
     Severity:  Normal        |   Keywords:  must-fix-before-028-rc crash
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+------------------------------------------
 Between 2da2718..7fa11a9 on master, and 01e7f42..55cf197 on maint-0.2.8,
 we merged code that causes crashes and make-test-network-all failures.

 The following master make test-network-all tests fail on Linux:

 {{{
 FAIL: bridges-min
 FAIL: hs-min
 FAIL: bridges+hs
 }}}

 The following master make test-network-all tests fail on OS X:
 {{{
 FAIL: bridges-min
 FAIL: hs-min
 FAIL: bridges+hs
 FAIL: bridges+ipv6-min
 FAIL: ipv6-exit-min
 FAIL: mixed
 }}}

 The following maint-0.2.8 make test-network-all tests fail on OS X:
 {{{
 FAIL: basic-min
 FAIL: bridges-min
 FAIL: hs-min
 FAIL: bridges+hs
 FAIL: bridges+ipv6-min
 FAIL: ipv6-exit-min
 FAIL: mixed
 }}}

 mixed uses 0.2.7.6 on my OS X.

 The master OS X failures happen due to the following crash:

 {{{
 Application Specific Information:
 crashed on child side of fork pre-exec
 *** error for object 0x7fb203c032c0: pointer being freed was not allocated


 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
 0   libsystem_kernel.dylib              0x00007fff9d1a6f06 __pthread_kill
 + 10
 1   libsystem_pthread.dylib             0x00007fff8daa84ec pthread_kill +
 90
 2   libsystem_c.dylib                   0x00007fff903bb6e7 abort + 129
 3   libsystem_malloc.dylib              0x00007fff8b468041 free + 425
 4   tor                                 0x00000001060086b1 config_free_all
 + 321 (config.c:841)
 5   tor                                 0x000000010606e233 tor_free_all +
 179 (main.c:3170)
 6   tor                                 0x000000010606e479 tor_cleanup +
 313 (main.c:3239)
 7   tor                                 0x0000000106067c31
 consider_hibernation + 129 (hibernate.c:971)
 8   tor                                 0x000000010606c7ce
 second_elapsed_callback + 590 (main.c:1467)
 9   libevent-2.0.5.dylib                0x0000000106261aa2 event_base_loop
 + 1871
 10  tor                                 0x000000010606c245 do_main_loop +
 1525 (main.c:2560)
 11  tor                                 0x000000010606e586 tor_main + 230
 (main.c:3660)
 12  tor                                 0x0000000105fd8ce9 main + 25
 (tor_main.c:30)
 13  libdyld.dylib                       0x00007fff982e35ad start + 1
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19006>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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