Ubuntu
smcroute package

smcroute daemon segfaults on precise-i386

Bug #1043688 reported by Robert Karsai
60
This bug affects 9 people
Affects Status Importance Assigned to Milestone
smcroute (Debian)
Fix Released
Unknown
smcroute (Ubuntu)
Fix Released
Undecided
Micha Lenk

Bug Description

Multicast routing daemon "smcroute" segfaults during startup:
---
root@betazed:~# smcroute -d -v -D
smcroute, Version 0.95, Build 111018
Copyright 2001-2005 Carsten Schill <email address hidden>
Copyright 2006-2009 Julien Blache <email address hidden>,
                    Todd Hayton <email address hidden>, and
                    Micha Lenk <email address hidden>
Distributed under the GNU GENERAL PUBLIC LICENSE, Version 2 - check GPL.txt

Segmentation fault (core dumped)
---
It seems that this happens only when you have more than one multicast capable network interface. It just starts OK with only one eth interface, but when there is a second multicast capable interface - it segfaults. Compiled from the latest source (https://github.com/troglobit/smcroute/zipball/1.99.0 -- version 1.99 vs. 0.95 in the repo) it is just OK.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: smcroute 0.95-1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24
Uname: Linux 3.2.0-29-generic-pae i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Thu Aug 30 10:19:56 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328)
SourcePackage: smcroute
UpgradeStatus: No upgrade log present (probably fresh install)

See original description
Revision history for this message
Robert Karsai (karsai-robert) wrote :
Robert Karsai (karsai-robert)
description: updated
Revision history for this message
Micha Lenk (micha) wrote :

I will take a closer look in the next few days.

Changed in smcroute (Ubuntu):
status: New → Confirmed
assignee: nobody → Micha Lenk (micha)
Revision history for this message
Dirk De Schepper (deschepper) wrote :

I'll be happy to provide logs or coredumps if it helps. I have been using smcroute on Ubuntu 12.04.01 for about 6 months without issue. It is a crucial component on my system.

Revision history for this message
Frederik Kriewitz (freddy436) wrote :

I've the same problem with version 0.95-1 in a setup with multiple vlan devices.
Using the previous version 0.94.1-1 solved the issue for me, so this is actually a regression.

Revision history for this message
Frederik Kriewitz (freddy436) wrote :

Backtrace with debugging symbols:
Starting program: /usr/sbin/smcroute -d

Program received signal SIGSEGV, Segmentation fault.
0x000000000040281c in buildIfVc () at ifvc.c:53
53 ifvc.c: No such file or directory.
(gdb) bt
#0 0x000000000040281c in buildIfVc () at ifvc.c:53
#1 0x000000000040172d in ServerLoop () at smcroute.c:189
#2 0x000000000040154e in main (ArgCn=<optimized out>, ArgVc=0x7fffffffe6c8) at smcroute.c:487

Revision history for this message
Micha Lenk (micha) wrote :

Frederik,

from reading the backtrace, do I conclude correctly that you have an interface without any configured IP address?

Regards,
Micha

Revision history for this message
Micha Lenk (micha) wrote :

I've just committed a suggested fix and pushed it to https://code.launchpad.net/~micha/ubuntu/precise/smcroute/lp1043688

I also created a PPA that should contain a fixed package soon:
https://launchpad.net/~micha/+archive/smcroute-backports

If you're trying this package, please report back whether that fixes the issue for you.

Regards,
Micha

Bug Watch Updater (bug-watch-updater)
Changed in smcroute (Debian):
status: Unknown → New
Bug Watch Updater (bug-watch-updater)
Changed in smcroute (Debian):
status: New → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package smcroute - 0.95-2

---------------
smcroute (0.95-2) unstable; urgency=low

  * Switch to dpkg-source 3.0 (quilt) format for easier patch maintenance.
  * Added patch 01_fix_segfault.patch to fix a NULL pointer dereferencing in
    interface vector initialization (closes: #707793, LP: #1043688).

 -- Micha Lenk <email address hidden> Wed, 22 May 2013 13:41:51 +0200

Changed in smcroute (Ubuntu):
status: Confirmed → Fix Released
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