Am 14.08.19 um 12:10 schrieb Ulrich Windl:
>>>> Michael Chapman <> schrieb am 14.08.2019 um 11:47 in
>> That's all true, but the thing we need to check here is that systemd 
>> correctly handles junk on the /run/systemd/private socket. The change on 
>> the systemctl side certainly tries to prevent incorrect data being sent 
>> down the socket -- though it looks like there's several ways in which 
>> fd_move_above_stdio() can fail, so this isn't foolproof -- but we need to 
>> ensure that some _malicious_ client can't DoS systemd.
> I don't want to contradict in principle, but doesn't "private socket" mean 
> it's intended to be used by systemd only? Of course being root allows you to 
> use any socket...

may is ask you to read the thread you are responding to?
nobody is touching the private socket

-------- Weitergeleitete Nachricht --------
Betreff: Re: [systemd-devel] systemd's connections to /run/systemd/private ?
Datum: Tue, 13 Aug 2019 17:50:56 -0400
Von: Brian Reichert <>
An: Zbigniew J??drzejewski-Szmek <>
Kopie (CC):
This is sufficient to reproduce the effect of increasing the number
of file descriptors open to /run/systemd/private; at least, on my
box, in it's current state:

  sh -c 'exec 1>&-; /usr/bin/systemctl status ntpd.service'

We have cronjob that closes STDOUT, remaps STDERR to a log file,
and runs this systemctl command.  In my environment, this one-liner
will cause that FD count to go up by, 100% reproducible
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