[tor-bugs] #25306 [Core Tor/Tor]: tor_assertion_failed_(): Bug: ../src/or/hs_service.c:1985: rotate_all_descriptors: Assertion service->desc_current failed; aborting.

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#25306: tor_assertion_failed_(): Bug: ../src/or/hs_service.c:1985:
rotate_all_descriptors: Assertion service->desc_current failed; aborting.
-------------------------------------------------+-------------------------
 Reporter:  cypherpunks                          |          Owner:  dgoulet
     Type:  defect                               |         Status:
                                                 |  merge_ready
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.3.2-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs, crash, 033-must,             |  Actual Points:
  032-backport, review-group-34,                 |
  033-triage-20180320, 033-included-20180320     |
Parent ID:                                       |         Points:
 Reviewer:  asn                                  |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by asn):

 Replying to [comment:21 dgoulet]:
 > I kind of think we need to nest the check unfortunately in order to
 catch the bug. There is really only one way this can happen and it is if
 our `valid_after` time is bigger than the service rotation time.
 >
 > If we were to not nest the checks, we would have something like this:
 >
 > {{{
 >    if (ns->valid_after >= service->state.next_rotation_time ||
 >        BUG(service->desc_current == NULL || service->desc_next == NULL))
 {
 >      goto no_rotation;
 >    }
 >    if (ns->valid_after >= service->state.next_rotation_time) {
 >      goto rotation;
 >    }
 > }}}
 >
 > I'm not super convinced it makes the code simpler? or more trivial?

 Agreed. We can proceed as is.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25306#comment:24>
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