Package: avahi-daemon Version: 0.7-3 Severity: important I have a custom service file, "/etc/avahi/services/instrument.service", containing the following:
+------------------------------------------------------------------------------------------------ | <?xml version="1.0" encoding="utf-8"?> | <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> | <service-group> | <name replace-wildcards="yes">%h</name> | <service> | <type>_abi-instrument._tcp</type> | <port>7000</port> | <txt-record>status=Sleeping</txt-record> | <txt-record>protocol=</txt-record> | <txt-record>experiment=</txt-record> | <txt-record>serialnumber=932006666</txt-record> | <txt-record>product=SeqStudio</txt-record> | <txt-record>runid=</txt-record> | <txt-record>version=1.1.dev</txt-record> | <txt-record>release=1.1.b2</txt-record> | <txt-record>build=</txt-record> | <txt-record>injection=</txt-record> | <txt-record>description=Applied Biosystems(tm) SeqStudio(tm) Genetic Analyzer</txt-record> | </service> | </service-group> +------------------------------------------------------------------------------------------------ With this file in place, "avahi-daemon" encounters a segfault starting up: > startbit:~# avahi-daemon --debug > Process 20682 died: No such process; trying to remove PID file. (/run/avahi-daemon//pid) > Found user 'avahi' (UID 113) and group 'avahi' (GID 118). > Successfully dropped root privileges. > avahi-daemon 0.7 starting up. > chroot.c: chroot() helper started > Successfully called chroot(). > Successfully dropped remaining capabilities. > chroot.c: chroot() helper got command 02 > Loading service file /services/instrument.service. > chroot.c: chroot() helper exiting with return value 0 > Segmentation fault However if I remove those "<txt-record>" entries that have no value after the "=" sign, "avahi-daemon" starts up normally (save for a bugus warnign about duplicate mDNS stack on this host): +------------------------------------------------------------------------------------------------ | <?xml version="1.0" encoding="utf-8"?> | <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> | <service-group> | <name replace-wildcards="yes">%h</name> | <service> | <type>_abi-instrument._tcp</type> | <port>7000</port> | <txt-record>status=Sleeping</txt-record> | <txt-record>protocol=</txt-record> | <txt-record>experiment=</txt-record> | <txt-record>serialnumber=932006666</txt-record> | <txt-record>product=SeqStudio</txt-record> | <txt-record>runid=</txt-record> | <txt-record>version=1.1.dev</txt-record> | <txt-record>release=1.1.b2</txt-record> | <txt-record>build=</txt-record> | <txt-record>injection=</txt-record> | <txt-record>description=Applied Biosystems(tm) SeqStudio(tm) Genetic Analyzer</txt-record> | </service> | </service-group> +------------------------------------------------------------------------------------------------ > startbit:~# avahi-daemon --debug > Process 20846 died: No such process; trying to remove PID file. (/run/avahi-daemon//pid) > Found user 'avahi' (UID 113) and group 'avahi' (GID 118). > Successfully dropped root privileges. > avahi-daemon 0.7 starting up. > chroot.c: chroot() helper started > Successfully called chroot(). > Successfully dropped remaining capabilities. > chroot.c: chroot() helper got command 02 > Loading service file /services/instrument.service. > Loading service file /services/ssh.service. > *** WARNING: Detected another IPv4 mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. *** > *** WARNING: Detected another IPv6 mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. *** > Joining mDNS multicast group on interface enp4s0.IPv6 with address fe80::a28c:fdff:fe32:8013. > New relevant interface enp4s0.IPv6 for mDNS. > Joining mDNS multicast group on interface enp4s0.IPv4 with address 10.43.32.19. > New relevant interface enp4s0.IPv4 for mDNS. > Network interface enumeration completed. > Registering new address record for fe80::a28c:fdff:fe32:8013 on enp4s0.*. > Registering new address record for 10.43.32.19 on enp4s0.IPv4. > Server startup complete. Host name is startbit.local. Local service cookie is 3029496375. > Service "startbit" (/services/ssh.service) successfully established. > Service "startbit" (/services/instrument.service) successfully established. Regards, -tor -- System Information: Debian Release: buster/sid APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'unstable'), (500, 'stable'), (500, 'oldstable') Architecture: amd64 (x86_64) Kernel: Linux 4.13.0-1-amd64 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages avahi-daemon depends on: ii adduser 3.116 ii bind9-host [host] 1:9.10.6+dfsg-5 ii dbus 1.12.2-1 ii init-system-helpers 1.51 ii libavahi-common3 0.7-3 ii libavahi-core7 0.7-3 ii libc6 2.25-1 ii libcap2 1:2.25-1.1 ii libdaemon0 0.14-6+b1 ii libdbus-1-3 1.12.2-1 ii libexpat1 2.2.3-2 ii lsb-base 9.20170808 Versions of packages avahi-daemon recommends: ii libnss-mdns 0.10-8 Versions of packages avahi-daemon suggests: pn avahi-autoipd <none> -- Configuration Files: /etc/default/avahi-daemon changed: AVAHI_DAEMON_DETECT_LOCAL=0 -- no debconf information