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[tor-bugs] #23915 [Applications/Tor Browser Sandbox]: 7.0.7 and later fails to work without `SECCOMP_FILTER_FLAG_TSYNC`.
#23915: 7.0.7 and later fails to work without `SECCOMP_FILTER_FLAG_TSYNC`.
--------------------------------------------------+---------------------
Reporter: yawning | Owner: yawning
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Applications/Tor Browser Sandbox | Version:
Severity: Normal | Keywords:
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
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{{{
2017/10/20 03:16:42 firefox: Sandbox: opendir /proc/self/task: No such
file or directory
2017/10/20 03:16:42 firefox: [Parent 3] WARNING: pipe error (59):
Connection reset by peer: file /home/debian/build/tor-
browser/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 322
2017/10/20 03:16:42 firefox: [Parent 3] WARNING: pipe error (57):
Connection reset by peer: file /home/debian/build/tor-
browser/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 322
2017/10/20 03:16:42 firefox: ###!!! [Parent][RunMessage] Error: Channel
error: cannot send/recv
2017/10/20 03:16:42 firefox: ###!!! [Parent][MessageChannel] Error:
(msgtype=0x2C0086,name=PBrowser::Msg_Destroy) Channel error: cannot
send/recv
}}}
This only affects systems running kernels that pre-date 3.17, which
annoyingly enough currently includes Debian oldstable. It's an artifact
of "the sandbox doesn't mount `/proc`", and "firefox wants to use
`/proc/self/task` to see if a process has threads or not". The need for
the latter goes away with the `seccomp()` flag, which is why I never saw
the issue.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23915>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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