CNAME loop causes avahi-daemon to crash

[benja]

Hi there,

I was playing with  http://www.avahi.org/wiki/Examples/PythonPublishAlias and I accidentaly published a cname named like the host name.

on host lenny.local, add a cname 'lenny.local' $ avahi-alias.py lenny.local

on another host $ dig lenny.local => avahi-daemon crashes due to exhausted stack space (i.e. infinite loop).

I see two issues:

• avahi shouldn't allow to register a new CNAME when there is already some record defined for this name.
• avahi-daemon shouldn't go into an infinite loop. I believe it should either detect that it's in a loop or simply limit the number of cname lookup redirections to a reasonable value.

Thanks !