[tor-bugs] #20773 [Applications/Tor Browser Sandbox]: Stop mounting `/proc` in the various containers once this is feasable.

Tor Bug Tracker & Wiki blackhole at torproject.org
Sat Dec 17 08:33:20 UTC 2016


#20773: Stop mounting `/proc` in the various containers once this is feasable.
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 Reporter:  yawning                           |          Owner:  yawning
     Type:  enhancement                       |         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 cypherpunks):

 Replying to [comment:6 yawning]:
 > One thing that I *could* do, but would rather not is to do something
 like [https://github.com/lxc/lxcfs lxcfs] and have the container "/proc"
 be serviced by a FUSE process in the host system.
 >
 > This would work, but I'm inclined to reject this due to:
 >
 >  * Yet another dependency, that needs to be SUID root.
 >  * It would be a lot of code.
 >  * Patching firefox to not fall over seems easier than "not-invented-
 here-ing" a filesystem.
 Please don't do this. FUSE is a mess, and SUID root just makes it almost
 worse than downright allowing access to `/proc`. Just don't mount it.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20773#comment:7>
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