openssh bugs - Jan 2010 - [Bug 1700] New: ssh-agent dies under high load

https://bugzilla.mindrot.org/show_bug.cgi?id=1700

           Summary: ssh-agent dies under high load
           Product: Portable OpenSSH
           Version: 5.1p1
          Platform: ix86
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P2
         Component: ssh-agent
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: kernel at pkts.ca


Hi..

I've found that under high load, the ssh-agent process dies.

The high load environment:
Home computer:  Fedora 10,  openssh-5.1p1
Gateway computer: Fedora 11, openssh-5.2p1
Cluster head node: MacOSX 10.6, openssh-5.2p1
6 Child nodes: MacOSX 10.4, 10.5, 10.6, various versions

The program:
On the cluster head node, run "ssh node### blastall -p blastp ..."
hundreds of times (80 jobs simultaneously, using 'make -j 80'), where
node### is a random child node.

The crash:
The ssh-agent process running on the home computer dies after a few
minutes of this, causing the saved key to be lost, and new ssh
connections require the passphrase for my private key.  Running
'ssh-agent tcsh' and 'ssh-add' fixes the problem at least for
the
children of one terminal window.  Logging out and back in restores full
functionality.

Observations:
Running 40 jobs simultaneously works.
I should probably be using an ssh-agent on the cluster head node, or
some other method that doesn't use ssh-agent.
I didn't see any rate-limiting code in ssh-agent for openssh-5.1p1, so
this is probably a bug, not a feature.

Thanks!

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https://bugzilla.mindrot.org/show_bug.cgi?id=1700

Tomas Mraz <t8m at centrum.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t8m at centrum.cz

--- Comment #1 from Tomas Mraz <t8m at centrum.cz> 2010-01-21 18:17:14 EST
---
Are you sure that the ssh-agent running on the home computer (Fedora
10) is a real ssh-agent and not for example gnome-keyring-daemon
emulating ssh-agent?

echo $SSH_AUTH_SOCK
will tell you more.

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--- Comment #2 from PFudd <kernel at pkts.ca> 2010-01-21 18:50:19 EST ---
(In reply to comment #1)
> Are you sure that the ssh-agent running on the home computer (Fedora
> 10) is a real ssh-agent and not for example gnome-keyring-daemon
> emulating ssh-agent?
> 
> echo $SSH_AUTH_SOCK
> will tell you more.
Ah, I see; it is the gnome-keyring-daemon.  I'll go file this bug with
them.

Thanks!

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PFudd <kernel at pkts.ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from PFudd <kernel at pkts.ca> 2010-01-21 19:15:08 EST ---
Apparently it's already been fixed in a later version.

I'm using gnome-keyring-2.24.1-1.fc10.i386.rpm, and the bug was
reported in https://bugzilla.gnome.org/show_bug.cgi?id=580068 , and
apparently fixed around August 2009.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #4 from Damien Miller <djm at mindrot.org> 2010-04-16 15:49:40
EST ---
Mass move of bugs RESOLVED->CLOSED following the release of
openssh-5.5p1

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