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** Attachment added: "StacktraceSource.txt"
   https://bugs.launchpad.net/bugs/1705570/+attachment/4918386/+files/StacktraceSource.txt

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https://bugs.launchpad.net/bugs/1705570

Title:
  jackd crashed with SIGSEGV in
  Streaming::StreamProcessor::packetsStopped()

Status in jackd2 package in Ubuntu:
  New

Bug description:
  Started jackd (version 2) with

  jackd -d firewire -r 96000

  and had a Mackie Onyx 1620 (with Firewire extension card) and an
  Alesis iO|14 connected in series.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: jackd2 1.9.10+20150825git1ed50c92~dfsg-2ubuntu2
  ProcVersionSignature: Ubuntu 4.11.0-10.15-lowlatency 4.11.8
  Uname: Linux 4.11.0-10-lowlatency i686
  ApportVersion: 2.20.5-0ubuntu5
  Architecture: i386
  CurrentDesktop: MATE
  Date: Thu Jul 20 22:22:11 2017
  ExecutablePath: /usr/bin/jackd
  InstallationDate: Installed on 2011-10-14 (2106 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
  ProcCmdline: jackd -d firewire -r 96000
  SegvAnalysis:
   Segfault happened at: 0xb5e9df68 <_ZN9Streaming15StreamProcessor14packetsStoppedEv+16>:	movl   $0x2,0x34(%eax)
   PC (0xb5e9df68) ok
   source "$0x2" ok
   destination "0x34(%eax)" (0x00000034) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: jackd2
  StacktraceTop:
   Streaming::StreamProcessor::packetsStopped() () at /usr/lib/libffado.so.2
   IsoHandlerManager::IsoHandler::disable() () at /usr/lib/libffado.so.2
   IsoHandlerManager::IsoHandler::~IsoHandler() () at /usr/lib/libffado.so.2
   IsoHandlerManager::pruneHandlers() () at /usr/lib/libffado.so.2
   IsoHandlerManager::unregisterStream(Streaming::StreamProcessor*) () at /usr/lib/libffado.so.2
  Title: jackd crashed with SIGSEGV in Streaming::StreamProcessor::packetsStopped()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin audio cdrom dialout fax floppy lpadmin lxd plugdev pulse-access sambashare

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