[tor-bugs] #27315 [Core Tor/Tor]: Sandbox regression in 0.3.4.7-rc

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#27315: Sandbox regression in 0.3.4.7-rc
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 Reporter:  toralf        |          Owner:  (none)
     Type:  defect        |         Status:  needs_revision
 Priority:  Medium        |      Milestone:  Tor: 0.3.4.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.4.7-rc
 Severity:  Normal        |     Resolution:
 Keywords:  regression?   |  Actual Points:
Parent ID:                |         Points:
 Reviewer:  ahf           |        Sponsor:
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Comment (by Jigsaw52):

 The rule with the cast fixes #25440 on systems affected by it. The #25440
 fix replaced the old version of the rule (without the cast) with the cast
 version. However, we now discovered that, on toralf system (which was not
 affected by #25440), removing the old rule breaks tor.

 In attempt to identify why toralf system behaves different than mine
 (which was affected by #25440), I asked toralf run a small program to
 check check the value of AT_FDCWD and size of several relevant types but
 all the results were equal to my system. As I was unable to find a way to
 identify which systems need which rule, my solution was to enable both
 rules.

 I have added the changes file and improved the commit message.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27315#comment:6>
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