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From: James McCoy <jamessan@debian.org>
Date: Wed, 1 Aug 2018 20:44:36 -0400
Subject: ssh-no-controlmaster
Bug #413102: Avoid accidentally becoming an ssh ControlMaster.
Bug #413102: Avoid accidentally becoming an ssh ControlMaster.
If you set ControlMaster via your ssh config:
.ssh/config:
Host *
ControlMaster auto
Controlpath ~/.ssh/master-%r@%h:%p
you can get 'svn: Can't write to connection: Broken pipe' with certain
ssh commands, because svn can open multiple ssh sessions and kill them
at unpredictable times.
I don't really think the problem is either svn's or openssh's fault,
but this is the obvious way to avoid it. We will still use ssh
connection sharing, but only if a ControlMaster is already present.
---
subversion/libsvn_ra_svn/client.c | 2 +-
subversion/libsvn_subr/config_file.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/subversion/libsvn_ra_svn/client.c b/subversion/libsvn_ra_svn/client.c
index ab1aa58..164cc76 100644
--- a/subversion/libsvn_ra_svn/client.c
+++ b/subversion/libsvn_ra_svn/client.c
@@ -399,7 +399,7 @@ static svn_error_t *find_tunnel_agent(const char *tunnel,
* versions have it too. If the user is using some other ssh
* implementation that doesn't accept it, they can override it
* in the [tunnels] section of the config. */
- val = "$SVN_SSH ssh -q --";
+ val = "$SVN_SSH ssh -q -o ControlMaster=no --";
}
if (!val || !*val)
diff --git a/subversion/libsvn_subr/config_file.c b/subversion/libsvn_subr/config_file.c
index bd2ec82..5014de6 100644
--- a/subversion/libsvn_subr/config_file.c
+++ b/subversion/libsvn_subr/config_file.c
@@ -1449,7 +1449,7 @@ svn_config_ensure(const char *config_dir, apr_pool_t *pool)
"### passed to the tunnel agent as <user>@<hostname>.) If the" NL
"### built-in ssh scheme were not predefined, it could be defined" NL
"### as:" NL
- "# ssh = $SVN_SSH ssh -q --" NL
+ "# ssh = $SVN_SSH ssh -q -o ControlMaster=no --" NL
"### If you wanted to define a new 'rsh' scheme, to be used with" NL
"### 'svn+rsh:' URLs, you could do so as follows:" NL
"# rsh = rsh --" NL
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