[systemd-devel] avahi disconnects from bus with kdbus

[David Herrmann]

Hi

On Thu, Feb 12, 2015 at 11:32 PM, Daniel Buch <boogiewasthere at gmail.com> wrote:
> Hi again,
>
> I found another problem, again with avahi-daemon but in combination with
> Telepathy haze.
> feb 13 08:26:39 dbuch-laptop systemd-coredump[1211]: Process 1167
> (telepathy-haze) of user 1000 dumped core.
>
>                                                      Stack trace of thread
> 1167:
>                                                      #0  0x00007fe0c9557ae0
> g_logv (libglib-2.0.so.0)
>                                                      #1  0x00007fe0c9557d1f
> g_log (libglib-2.0.so.0)
>                                                      #2  0x000000000041261c
> n/a (telepathy-haze)
>                                                      #3  0x00007fe0c955091d
> g_main_context_dispatch (libglib-2.0.so.0)
>                                                      #4  0x00007fe0c9550cf8
> n/a (libglib-2.0.so.0)
>                                                      #5  0x00007fe0c9551022
> g_main_loop_run (libglib-2.0.so.0)
>                                                      #6  0x00007fe0c9214631
> tp_run_connection_manager (libtelepathy-glib.so.0)
>                                                      #7  0x000000000040e73b
> n/a (telepathy-haze)
>                                                      #8  0x00007fe0c8b1e800
> __libc_start_main (libc.so.6)
>                                                      #9  0x000000000040e7ad
> n/a (telepathy-haze)

This looks like a bug in telepathy, properly triggered by a dbus
error. This should be fixed upstream, but..

> feb 13 08:26:42 dbuch-laptop systemd[642]: Starting DBUS1:
> org.freedesktop.Telepathy.ConnectionManager.haze...
> feb 13 08:26:42 dbuch-laptop systemd[642]: Started DBUS1:
> org.freedesktop.Telepathy.ConnectionManager.haze.
> feb 13 08:26:42 dbuch-laptop systemd[1]: Starting Avahi mDNS/DNS-SD Stack...
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Found user 'avahi' (UID 84)
> and group 'avahi' (GID 84).
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Successfully dropped root
> privileges.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: avahi-daemon 0.6.31
> starting up.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Successfully called
> chroot().
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Successfully dropped
> remaining capabilities.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Loading service file
> /services/sftp-ssh.service.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Process 313 died: No such
> process; trying to remove PID file. (/var/run/avahi-daemon//pid)
> feb 13 08:26:42 dbuch-laptop systemd[1]: Started Avahi mDNS/DNS-SD Stack.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Loading service file
> /services/ssh.service.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Joining mDNS multicast
> group on interface wlp3s0.IPv4 with address 192.168.1.2.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: New relevant interface
> wlp3s0.IPv4 for mDNS.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Network interface
> enumeration completed.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Registering new address
> record for fe80::eab1:fcff:fec4:eae1 on wlp3s0.*.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Registering new address
> record for 192.168.1.2 on wlp3s0.IPv4.
> feb 13 08:26:42 dbuch-laptop avahi-daemon[1217]: Registering HINFO record
> with values 'X86_64'/'LINUX'.
> feb 13 08:26:42 dbuch-laptop systemd-bus-proxyd[329]: Failed to send message
> to bus: Operation not permitted

..this might be what triggered it. It'd be interesting to see which
message was refused here. I'll see whether we can make the bus-proxy
more verbose on EPERM.

Thanks
David