[Bug 1638345] Re: avahi-daemon crashes multiple times an hour

[Tessa]

I have never done any manual Avahi configuration, and this is a fresh
install of Ubuntu 16.10 on my new Macbook Pro. Where do the valgrind
logs live?

Also, it's doing the 100% cpu thing right now, so bt is below. Note
there's a lot of missing debugging symbols, but I don't see any -dbg
packages for libavahi or similar. If you can suggest how to get these
debugging symbols installed, I imagine it'll make the backtrace more
illuminating:


$ sudo gdb -p 12169
GNU gdb (Ubuntu 7.11.90.20161005-0ubuntu1) 7.11.90.20161005-git
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
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Attaching to process 12169
Reading symbols from /usr/sbin/avahi-daemon...(no debugging symbols found)...done.
Reading symbols from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3...(no debugging symbols found)...done.
Reading symbols from /usr/lib/x86_64-linux-gnu/libavahi-core.so.7...(no debugging symbols found)...done.
Reading symbols from /usr/lib/x86_64-linux-gnu/libdaemon.so.0...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libexpat.so.1...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libcap.so.2...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libdl-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libdbus-1.so.3...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug/.build-id/71/b2c79a4defc42524ea7e564173f0b65fe89010.debug...done.
done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libc-2.24.so...done.
done.
Reading symbols from /lib64/ld-linux-x86-64.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/ld-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libsystemd.so.0...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libselinux.so.1...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/librt.so.1...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/librt-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/liblzma.so.5...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libgcrypt.so.20...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libpcre.so.3...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libgpg-error.so.0...(no debugging symbols found)...done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_compat.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_compat-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnsl.so.1...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnsl-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_nis.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_nis-2.24.so...done.
done.
Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...Reading symbols from /usr/lib/debug//lib/x86_64-linux-gnu/libnss_files-2.24.so...done.
done.
0x00007f36c9a08f0a in __mmap (addr=0x0, len=4096, prot=<optimized out>, flags=34, fd=<optimized out>, offset=0) at ../sysdeps/unix/sysv/linux/wordsize-64/mmap.c:34
34	../sysdeps/unix/sysv/linux/wordsize-64/mmap.c: No such file or directory.
(gdb) bt
#0  0x00007f36c9a08f0a in __mmap (addr=0x0, len=4096, prot=<optimized out>, flags=34, fd=<optimized out>, offset=0) at ../sysdeps/unix/sysv/linux/wordsize-64/mmap.c:34
#1  0x00007f36c998a5d1 in sysmalloc (nb=nb at entry=32, av=<optimized out>) at malloc.c:2332
#2  0x00007f36c998b50a in _int_malloc (av=av at entry=0x0, bytes=bytes at entry=8) at malloc.c:3862
#3  0x00007f36c998dc0a in __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at malloc.c:3281
#4  0x00007f36c9f0e067 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#5  0x00007f36c9f0a9e7 in dbus_message_get_path_decomposed () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#6  0x00007f36c9f0da93 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#7  0x00007f36c9eff264 in dbus_connection_dispatch () from /lib/x86_64-linux-gnu/libdbus-1.so.3
#8  0x00005628bc167506 in ?? ()
#9  0x00007f36cabad5f8 in avahi_simple_poll_dispatch () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#10 0x00005628bc158ebe in ?? ()
#11 0x00007f36c99273f1 in __libc_start_main (main=0x5628bc158470, argc=2, argv=0x7ffe60321fe8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe60321fd8)
    at ../csu/libc-start.c:291
#12 0x00005628bc159519 in ?? ()

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https://bugs.launchpad.net/bugs/1638345

Title:
  avahi-daemon crashes multiple times an hour

Status in avahi package in Ubuntu:
  Confirmed

Bug description:
  Ever since upgrading to 16.10, avahi-daemon crashes multiple times an
  hour, leading to the prompt to report the issue to Ubuntu.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: avahi-daemon 0.6.32-1ubuntu1
  ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
  Uname: Linux 4.8.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Nov  1 10:48:35 2016
  InstallationDate: Installed on 2016-07-08 (115 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  SourcePackage: avahi
  UpgradeStatus: Upgraded to yakkety on 2016-10-31 (0 days ago)

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