avahi-daemon segfaults when a txt-record has no value

[kirichkov]

Version: avahi-daemon 0.7 on Raspbian Buster

Service XML causing the segfault:

<?xml version="1.0" standalone='no'?><!--*-nxml-*-->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
  <name replace-wildcards="yes">Printer</name>
  <service protocol="ipv4">
    <type>_ipp._tcp.</type>
    <host-name>printer.local</host-name>
    <port>631</port>
    <txt-record>note=</txt-record>
  </service>
</service-group>

The line <txt-record>note=</txt-record> causes avahi to segfault. That did not happen on previous version of Raspbian.

The Workaround I found was: <txt-record>note=""</txt-record> I.e. setting the note to an empty string.

[lathiat]

Merged