[Bug 1679117] Re: avahi-daemon crashed with SIGABRT in avahi_malloc()

[Trent Lloyd]

*** This bug is a duplicate of bug 1668559 ***
    https://bugs.launchpad.net/bugs/1668559

Commenting here as the duplicate parent is Private at the moment.

Main issue is here, hitting rlimit-data which is set by default in the config file to 4M
> kernel: mmap: avahi-daemon (992): VmData 4272128 exceed data ulimit 4194304. Update limits or use boot option ignore_rlimit_data.

Not sure what is causing this to go high on a few machines, possibly
number of services on the network. Testing here it looks like avahi
needs generally about 2M when publishing 30+ services so this limit is
likely way too low given we're over 50% there in common usage.


Main thing to confirm here is that this is simply hitting the limit in normal usage, and not a bug causing runaway memory usage. If anyone would like to test it would be great to:

 (a) Confirm whether this happens constantly (does avahi always crash) or did it happen once-off and not happen again. If restart now does it crash again? systemctl restart avahi-daemon
 (b) Modify /etc/avahi/avahi-daemon.conf and change "rlimit-data=4194304" to "rlimit-data=16777216"
 (c) restart avahi-daemon again: systemctl restart avahi-daemon
 (c) report back if the crash occured both before, and after the change

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https://bugs.launchpad.net/bugs/1679117

Title:
  avahi-daemon crashed with SIGABRT in avahi_malloc()

Status in avahi package in Ubuntu:
  New

Bug description:
  The problem started with Ubuntu 16.10 and is still here after the upgrade to 17.04.
  A warning message displays several times a day.
  I click submit or cancel and nothing seems to happen.
  No other problems but the message. Everything seems to work properly.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.04
  Package: avahi-daemon 0.6.32-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3
  Uname: Linux 4.10.0-14-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  CrashCounter: 1
  Date: Mon Apr  3 12:26:42 2017
  ExecutablePath: /usr/sbin/avahi-daemon
  InstallationDate: Installed on 2014-04-14 (1084 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140413)
  ProcCmdline: avahi-daemon:\ running\ [hostname.local]
  ProcEnviron:
   
  Signal: 6
  SourcePackage: avahi
  StacktraceTop:
   ?? () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
   avahi_malloc () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
   avahi_prio_queue_put () from /usr/lib/x86_64-linux-gnu/libavahi-core.so.7
   avahi_time_event_new () from /usr/lib/x86_64-linux-gnu/libavahi-core.so.7
   ?? () from /usr/lib/x86_64-linux-gnu/libavahi-core.so.7
  Title: avahi-daemon crashed with SIGABRT in avahi_malloc()
  UpgradeStatus: Upgraded to zesty on 2017-04-03 (0 days ago)
  UserGroups:

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