[Pkg-utopia-maintainers] Bug#773525: Bug#773525: Randomly excludes available connections [when there are too many?]

[Michael Biebl]

Am 19.12.2014 um 15:32 schrieb Pietro Battiston:
> Package: network-manager
> Version: 0.9.10.0-4
> Severity: grave
> 
> Copypasted from a shell:
> 
> pietro at debiousci:~$ for i in `seq 1 10`; do nmcli c | wc; done
>     127     637   12827
>     127     637   12827
>     127     627   12827
>     126     628   12726
>     127     629   12573
>     127     634   12828
>     127     629   12827
>     127     630   12319
>     127     631   12827
>     127     627   12827
> 
> 
> I am clearly not changing my list of available connections (so quick!). So what
> is happening is that network-manager is dropping some of my registered
> connections, in a random way. Initially I though "it is unable to handle more
> than 127", but then I saw that sometimes it only lists 126. The output of
> "nmcli c" is otherwise almost sane (see below).

Seeing the latest upstream release, it noticed the following commit [1]:

> dbus: increase 'max_replies_per_connection' limit in D-Bus configuration
> D-Bus default limit of replies per connection has been lowered to 128 due to
> CVE-2014-3638, see:
> http://cgit.freedesktop.org/dbus/dbus/commit/?id=5bc7f9519ebc6117ba300c704794b36b87c2194b
> https://bugs.freedesktop.org/show_bug.cgi?id=81053
> 
> The limit seems to be too low and causes problems in libnm-glib, that will not
> return all NetworkManager connection profiles if there are too many of them
> (roughly more than the limit). As a consequence, libnm-glib based clients will
> not work properly.

This looks like it could be the reason for the problem you are seeing.

That said, I'm not sure if individual daemon packages overriding the
dbus policy in that regard is a good idea (and a proper fix).

I've CCed the upstream maintainers of NM and dbus. Maybe we can find a
solution for this.

Michael


[1]
http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=2c299ba65c51e9c407090dc83929d692c74ee3f2
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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