[tbb-bugs] #26895 [Applications/Tor Browser]: 'Error downloading build result' after GCC in container Tor Browser Bundle Build (rbm)... most descriptive error ever ocurred in the world

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#26895: 'Error downloading build result' after GCC in container Tor Browser Bundle
Build (rbm)... most descriptive error ever ocurred in the world
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 Reporter:  kfseaperson               |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by kfseaperson):

 Maybe it is a good idea to add to the readme.builderrors (or to the rbm
 itself) instruction to change umask.
 Since if rbm requires sudo (and creates files with root) with file
 permission without o+r (other may read) the "Can't find container image in
 input files" error is shown when a project is build by the end user
 account when requiring container image (or different input files).
 allowing other to read all files is not in the philosophy of privacy (and
 so probably Tor Project one)
 Users may have different umasks (the default permissions a file got when
 it is created) especially the more privacy caring ones(more strict than
 022 (you can read write, other can read)), which shouldn't be rare with a
 product like Tor browser :)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26895#comment:9>
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