[Bug 3411] New: 8.9 regression: "ssh -XAf localhost xeyes" uses 100% CPU

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3411

            Bug ID: 3411
           Summary: 8.9 regression: "ssh -XAf localhost xeyes" uses 100%
                    CPU
           Product: Portable OpenSSH
           Version: 8.9p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: harri at afaics.de

Hi folks,

a simple ssh command like

        ssh -XAf localhost xeyes

uses 100% CPU when the terminal goes away. There is no such problem for
openssh 8.8 (or for using nohup).

Same problem for other apps instead of xeyes (e.g. xterm) and for
remote hosts instead of localhost.

configure command line:

./configure --prefix=/usr/local/stow/openssh-8.9p1
--with-privsep-path=/tmp/empty

I got the same problem using Debian's ssh client, see
https://bugs.debian.org/1007822


Regards

Harri

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