linux-kernel - Re: kdbus: to merge or not to merge?

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Date:	Thu, 6 Aug 2015 19:24:51 +0200
From:	Daniel Mack <daniel@...que.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	David Herrmann <dh.herrmann@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andy Lutomirski <luto@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Djalal Harouni <tixxdz@...ndz.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Havoc Pennington <havoc.pennington@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>,
	"Kalle A. Sandstrom" <ksandstr@....fi>,
	Borislav Petkov <bp@...en8.de>, cee1 <fykcee1@...il.com>
Subject: Re: kdbus: to merge or not to merge?

On 08/06/2015 05:27 PM, Andy Lutomirski wrote:
>> In DBus (both kdbus and DBus1), such matches are installed on the
>> > NameOwnerChanged signal, and they can be either specific to a single ID,
>> > or broad, which will make them match on any ID. There's actually no
>> > reason for applications to install unspecific matches, but if they do,
>> > they will of course get what they asked for, and are woken up on every
>> > ID that is added to or removed from the bus. What you're seeing in your
>> > system profile is that some applications misbehave and install
>> > unspecific matches when they shouldn't. That's a userspace bug that
>> > needs fixing. Two candidates were actually in the systemd code base
>> > (logind and PID1), and both are now patched.
>
> Can you point me at the patch?

  https://github.com/systemd/systemd/pull/876
  https://github.com/systemd/systemd/pull/887

firewalld and possibly some other applications in the Fedora default
install use python-slip, a convenience library that currently
unconditionally installs the broad matches. I filed a bug with patches here:

  https://fedorahosted.org/python-slip/ticket/2


And I filed more bugs for some GNOME components.


Thanks,
Daniel

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