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Re: [tor-bugs] #21077 [Applications/Tor Browser Sandbox]: firefox: Can't mount proc on /newroot/proc

#21077: firefox: Can't mount proc on /newroot/proc
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 Reporter:  adrelanos                         |          Owner:  yawning
     Type:  defect                            |         Status:  new
 Priority:  Medium                            |      Milestone:
Component:  Applications/Tor Browser Sandbox  |        Version:
 Severity:  Normal                            |     Resolution:
 Keywords:                                    |  Actual Points:
Parent ID:                                    |         Points:
 Reviewer:                                    |        Sponsor:
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Comment (by yawning):

 Odd.

 There's nothing obviously wrong at first glance in the debug output and
 it's the bwrap process killing itself (because it's failing to mount
 procfs in it's privsep helper failed with EPERM).  FWIW, this works on the
 jessie VMs I have for testing (both 32 bit and 64 bit).

 I'd suggest one of:
  * Rebuild bubblewrap with strategic debugging instrumentation added.
  * Use ptrace/ltrace/gdb to figure out what's actually going on.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21077#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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