[tor-bugs] #23751 [Core Tor/Tor]: [warn] tor_bug_occurred_: Bug: src/common/buffers.c, etc.

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Nov 8 14:52:25 UTC 2017

#23751: [warn] tor_bug_occurred_: Bug: src/common/buffers.c, etc.
 Reporter:  Felixix                             |          Owner:  dgoulet
     Type:  defect                              |         Status:
                                                |  needs_review
 Priority:  Very High                           |      Milestone:  Tor:
                                                |  0.3.2.x-final
Component:  Core Tor/Tor                        |        Version:
 Severity:  Normal                              |     Resolution:
 Keywords:  tor-channel, tor-sched, tor-buffer  |  Actual Points:
Parent ID:  #23993                              |         Points:
 Reviewer:                                      |        Sponsor:  SponsorV
Changes (by dgoulet):

 * priority:  High => Very High
 * status:  accepted => needs_review


 See branch: `bug23751_032_01`.

 To be clear, the above is a bandaid that I'm not happy about but for 032 I
 don't think we have much choice. To propagate back up the connection write
 error, we would need a refactoring touching many subsystems.

 This again piles on the importance of #23993. The channel subsystems needs
 a thorough cleanup/redesign.

 Last thing, this can possibly lead to a use-after-free (I'm still
 uncertain if that can be triggered remotely) with the KIST scheduler so
 I'm bumping this fix to a higher priority.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23751#comment:13>
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