[tor-bugs] #23414 [Core Tor/Tor]: rep_hist_format_hs_stats() should add noise, then round

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#23414: rep_hist_format_hs_stats() should add noise, then round
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  teor
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.6.2-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-relay, security-low, privcount,  |  Actual Points:
  031-backport, 030-backport, 029-backport,      |
  028-backport                                   |
Parent ID:  #23061                               |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * keywords:
     tor-relay, security-low, privcount, 031-backport, 030-backport,
     029-backport, 028-backport-maybe, 026-backport-maybe
     =>
     tor-relay, security-low, privcount, 031-backport, 030-backport,
     029-backport, 028-backport


Comment:

 I made a new branch at bug23414-v4, and split off some unrelated changes
 into #23323.

 It needs a working round_int64_to_next_multiple_of(), which also needs to
 be backported to 0.2.8 and later. There is a possible fix in #19130 (which
 we closed by deleting the buggy function).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23414#comment:4>
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