Bug 2383 - ssh-copy-id hangs when already connected with connection sharing
Summary: ssh-copy-id hangs when already connected with connection sharing
Status: CLOSED DUPLICATE of bug 2195
Alias: None
Product: Portable OpenSSH
Classification: Unclassified
Component: ssh-copy-id (show other bugs)
Version: 6.8p1
Hardware: All All
: P5 minor
Assignee: Assigned to nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-04-16 00:58 AEST by Paul Tobias
Modified: 2015-08-11 23:04 AEST (History)
0 users

See Also:

Attachments
ssh-copy-id-connection-sharing-hang.patch (559 bytes, patch)
2015-04-16 00:58 AEST, Paul Tobias 		no flags Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Paul Tobias 2015-04-16 00:58:23 AEST 
Created attachment 2587 [details]
ssh-copy-id-connection-sharing-hang.patch

If I successfully ssh into somewhere and then try to use ssh-copy-id, it just hangs.

I have this in my .ssh/config:
ControlMaster  auto
ControlPath    /dev/shm/ssh_control_%h_%p_%r
ControlPersist 3600

It's because of this line in ssh-copy-id:
REMOTE_VERSION=$(ssh -v -o PreferredAuthentications=',' "$@" 2>&1 |
                 sed -ne 's/.*remote software version //p')

Because of the connection sharing, this doesn't fail, but opens a shell on the other side and waits for input indefinitely.

A simple fix is to add -o ControlPath=none.
Comment 1 Paul Tobias 2015-04-16 02:18:39 AEST 
Oh, this was already reported as bug 2195. I went through the process at http://www.openssh.com/report.html, but I didn't see that bug.

*** This bug has been marked as a duplicate of bug 2195 ***
Comment 2 Damien Miller 2015-08-11 23:04:03 AEST 
Set all RESOLVED bugs to CLOSED with release of OpenSSH 7.1