[tor-bugs] #21319 [Applications/Tor Browser Sandbox]: Update verification fails, but update still applies

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#21319: Update verification fails, but update still applies
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     Reporter:  Digitalcourage                   |      Owner:  yawning
         Type:  defect                           |     Status:  new
     Priority:  Medium                           |  Milestone:
    Component:  Applications/Tor Browser         |    Version:
  Sandbox                                        |   Keywords:  sandboxed
     Severity:  Minor                            |  0.0.3 binary
Actual Points:                                   |  Parent ID:
       Points:                                   |   Reviewer:
      Sponsor:                                   |
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 This resembles an issue Tor Messenger had (#19809), but I downloaded
 https://www.torproject.org/dist/torbrowser/7.0a1/sandbox-0.0.3-linux64.zip
 manually and started it.

 Everything works, but these error messages on the console worry me:

 2017/01/25 18:MM:SS update: Downloading
 https://cdn.torproject.org/aus1/torbrowser/7.0a1-hardened/tor-browser-
 linux64-6.5a6-hardened-7.0a1-hardened_ALL.incremental.mar
 2017/01/25 18:MM:SS update: Validating Tor Browser Update.
 2017/01/25 18:MM:SS update: Shutting down old tor.
 2017/01/25 18:MM:SS tor: Jan 25 18:MM:SS.000 [notice] Catching signal
 TERM, exiting cleanly.
 2017/01/25 18:MM:SS tor: ==3==AddressSanitizer CHECK failed:
 ../../.././libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc:326
 "((sigprocmask_status)) == ((0))" (0xffffffffffffffda, 0x0)
 2017/01/25 18:MM:SS tor: SRAT init
 2017/01/25 18:MM:SS tor: SRAT warning: cannot find Memory Layout File.
 Stack trace will be probably wrong.
 2017/01/25 18:MM:SS update: Updating Tor Browser.
 …
 2017/01/25 18:MM:SS update: ERROR: Error verifying signature.
 2017/01/25 18:MM:SS update: ERROR: Not all signatures were verified.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21319>
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