[systemd-devel] Antw: Re: systemd's connections to /run/systemd/private ?

[Reindl Harald]

Am 14.08.19 um 12:41 schrieb Michael Chapman:
> On Wed, 14 Aug 2019, Reindl Harald wrote:
>> Am 14.08.19 um 12:10 schrieb Ulrich Windl:
>>>>>> Michael Chapman <mike at very.puzzling.org> 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
> 
> systemctl will mostly use /run/systemd/private when run as root

that's not the point - the point is his talking about "doesn't private
socket mean" when the code triggering in the thread the issue don't talk
to it directly