[Bug 3747] New: ssh with ldap user account slow every time, local accounts unaffected

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3747

            Bug ID: 3747
           Summary: ssh with ldap user account slow every time, local
                    accounts unaffected
           Product: Portable OpenSSH
           Version: 8.9p1
          Hardware: 68k
                OS: Mac OS X
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: craig.emery at arm.com

Created attachment 3841
  --> https://bugzilla.mindrot.org/attachment.cgi?id=3841&action=edit
A snippet of /var/log/auth.log when logging in as an LDAP user.

I have an Ubuntu install on arm64
openssh version 1:8.9p1_3ubuntu10 installed.

Whe I ssh to the machine with an authorized key in an LDAP account it
takes approx 17seconds to get a shell prompt.

When I do the same with the same key but to a simple local account,
it's under one second.

/var/log/auth.log shows ensure_minimum_time_since() "sleeping" for 3.5
seconds. This seems to happen more than once. And "going in" it says
we've already spent 7 seconds.

Going from the debug logs I can't find out why and why only when the
"target" user is an LDAP one.

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