bugzilla-daemon at bugzilla.mindrot.org
2007-Jul-05 15:19 UTC
[Bug 1329] New: stale control sockets prevent connection.
http://bugzilla.mindrot.org/show_bug.cgi?id=1329
Summary: stale control sockets prevent connection.
Product: Portable OpenSSH
Version: 4.6p1
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: ssh
AssignedTo: bitbucket at mindrot.org
ReportedBy: dwmw2 at infradead.org
Created an attachment (id=1318)
--> (http://bugzilla.mindrot.org/attachment.cgi?id=1318)
clean up stale control sockets
If there's a stale socket lying around, we should remove it rather than
just failing to connect to it and then aborting.
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bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-12 06:51 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |djm at mindrot.org
--- Comment #1 from Damien Miller <djm at mindrot.org> 2008-06-12
16:51:31 ---
what about cases where the mux server has exceeded its connection
backlog? wouldn't you end up zapping a live mux socket there?
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bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-12 06:55 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329 --- Comment #2 from Damien Miller <djm at mindrot.org> 2008-06-12 16:55:07 --- Created an attachment (id=1513) --> (http://bugzilla.mindrot.org/attachment.cgi?id=1513) fall back from mux client to TCP connection on error I think this approach is safer: fall back to creating a new TCP connection after errors in the mux client path. -- Configure bugmail: https://bugzilla.mindrot.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. You are watching someone on the CC list of the bug.
bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-12 06:56 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |1208
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bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-12 06:57 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |1349
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bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-12 06:57 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329 --- Comment #3 from Damien Miller <djm at mindrot.org> 2008-06-12 16:57:28 --- Created an attachment (id=1514) --> (http://bugzilla.mindrot.org/attachment.cgi?id=1514) fall back from mux client to TCP connection on error I think this approach is safer: fall back to creating a new TCP connection after errors in the mux client path. -- Configure bugmail: https://bugzilla.mindrot.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. You are watching someone on the CC list of the bug.
bugzilla-daemon at bugzilla.mindrot.org
2008-Jun-13 00:17 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|4.6p1 |5.0p1
OS/Version|Linux |All
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #4 from Damien Miller <djm at mindrot.org> 2008-06-13
10:17:49 ---
patch applied; will be in openssh-5.1
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bugzilla-daemon at bugzilla.mindrot.org
2008-Jul-22 02:19 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #5 from Damien Miller <djm at mindrot.org> 2008-07-22
12:19:01 ---
Mass update RESOLVED->CLOSED after release of openssh-5.1
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bugzilla-daemon at bugzilla.mindrot.org
2010-Jun-04 10:04 UTC
[Bug 1329] stale control sockets prevent connection.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329 --- Comment #6 from David Woodhouse <dwmw2 at infradead.org> --- (In reply to comment #1)> what about cases where the mux server has exceeded its connection > backlog? wouldn't you end up zapping a live mux socket there?I don't think so. In that case, you'll get a fairly long (perhaps infinite?) timeout on connect() followed by -EAGAIN. You could _only_ get -ECONNREFUSED if there really isn't anything listening, I believe. (In reply to comment #3)> I think this approach is safer: fall back to creating a new TCP > connection after errors in the mux client path.The problem with this approach is that when there are stale sockets lying around, it looks nothing will ever clean them up. So with 'ControlMaster Auto' you will keep falling back to TCP connections and not using the mux socket (and not creating a new mux socket) for ever. I much prefer the option of deleting the offending socket. On the other hand, perhaps we just don't want sockets to appear in the file system at all -- perhaps we should allow the user to use 'abstract' socket addresses.... see bug #1775. -- Configure bugmail: https://bugzilla.mindrot.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. You are watching someone on the CC list of the bug.
bugzilla-daemon at bugzilla.mindrot.org
2011-Mar-09 15:33 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
David Woodhouse <dwmw2 at infradead.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|stale control sockets |stale control sockets
|prevent connection. |prevent connection
| |multiplexing.
Status|CLOSED |REOPENED
Resolution|FIXED |
--- Comment #7 from David Woodhouse <dwmw2 at infradead.org> 2011-03-10
02:33:59 EST ---
This *used* to work with my old patches; the stale control socket would
be removed.
$ ssh macbook
Control socket connect(/home/dwmw2/.ssh/sockets/macbook-22-dwmw2):
Connection refused
ControlSocket /home/dwmw2/.ssh/sockets/macbook-22-dwmw2 already exists,
disabling multiplexing
[dwmw2 at macbook ~]$ logout
Connection to macbook closed.
$ ssh macbook
Control socket connect(/home/dwmw2/.ssh/sockets/macbook-22-dwmw2):
Connection refused
ControlSocket /home/dwmw2/.ssh/sockets/macbook-22-dwmw2 already exists,
disabling multiplexing
[dwmw2 at macbook ~]$
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bugzilla-daemon at bugzilla.mindrot.org
2011-May-20 12:22 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
David Woodhouse <dwmw2 at infradead.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #1318|0 |1
is obsolete| |
Attachment #1513|0 |1
is obsolete| |
Attachment #1514|0 |1
is obsolete| |
--- Comment #8 from David Woodhouse <dwmw2 at infradead.org> 2011-05-20
22:22:58 EST ---
Created attachment 2050
--> https://bugzilla.mindrot.org/attachment.cgi?id=2050
Patch to unlink stale socket, against 5.6p1
This patch fixes the problem.
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bugzilla-daemon at bugzilla.mindrot.org
2011-May-23 09:46 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
David Woodhouse <dwmw2 at infradead.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #2050|0 |1
is obsolete| |
--- Comment #9 from David Woodhouse <dwmw2 at infradead.org> 2011-05-23
19:46:01 EST ---
Created attachment 2051
--> https://bugzilla.mindrot.org/attachment.cgi?id=2051
Remove stale socked only if ControlMaster=auto
This version is modified to further address the fear in comment #1 ?
even though I don't think it's valid, as I explained in comment #6.
It will now *only* remove the non-responsive socket if a replacement
socket is going to be automatically recreated (i.e. ControlMaster set
to auto or autoask).
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bugzilla-daemon at bugzilla.mindrot.org
2011-Jun-03 02:20 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |FIXED
--- Comment #10 from Damien Miller <djm at mindrot.org> 2011-06-03
12:20:33 EST ---
IIRC this was fixed in 5.8. We have this code now:
> if (errno == ECONNREFUSED &&
> options.control_master != SSHCTL_MASTER_NO) {
> debug("Stale control socket %.100s, unlinking", path);
> unlink(path);
> }
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bugzilla-daemon at bugzilla.mindrot.org
2011-Sep-06 05:33 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #11 from Damien Miller <djm at mindrot.org> 2011-09-06
15:33:00 EST ---
close resolved bugs now that openssh-5.9 has been released
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bugzilla-daemon at bugzilla.mindrot.org
2011-Sep-25 05:31 UTC
[Bug 1329] stale control sockets prevent connection multiplexing.
https://bugzilla.mindrot.org/show_bug.cgi?id=1329
Jan F. Chadima <jfch at jagda.eu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jfch at jagda.eu
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Reasonably Related Threads
- [Bug 1775] New: RFE: Would like to use 'abstract' unix sockets for ControlPath
- [Bug 1349] New: race condition with ControlMaster=auto
- [Bug 983] Required authentication
- [Bug 17377] New: NV50 failure on MacBook Pro.
- [Bug 1330] New: RFE: 'ControlPersist' support -- automatically fork and leave ControlMaster behind as a dæmon