Debian Bug report logs - #400866
guessnet: Caught unexpected expectation

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: atanaka@hotcake.halfmoon.jp

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: guessnet: Caught unexpected expectation

Date: Wed, 29 Nov 2006 18:04:47 +0900

Package: guessnet
Version: 0.41-1
Severity: important

guesset fails on our xeon box. Here is a shell script to reproduce a bug:

#!/bin/sh
# guessnet-debug

/usr/sbin/guessnet -v --debug <<EOF
debugEntry peer 192.168.0.1
EOF

# end of the script


The result is the following:

guessnet: 1 candidates found in input
guessnet: Guessnet 0.41 starting...
guessnet: Trying MII detection
guessnet: 1 candidate profiles
guessnet: Trying MII detection
guessnet: Initialized test subsystems
guessnet: Added "default" test none
guessnet: Default test is none
guessnet: Will check network debugEntry for IP address 192.168.0.1 (MAC 00:00:00:00:00:00)
guessnet: Starting peer test subsystem
guessnet: Sending 10 ARP probes, 1 every second...
guessnet: Listen ARP
guessnet: Started tests
guessnet: 2 candidates
Caught unexpected exception, 15 stack frames unwound:
   /usr/sbin/guessnet [0x43a583]
   /usr/lib/libstdc++.so.6 [0x2ba4b1e5f606]
   /usr/lib/libstdc++.so.6 [0x2ba4b1e5f623]
   /usr/lib/libstdc++.so.6(__gxx_personality_v0+0x472) [0x2ba4b1e5f582]
   /lib/libgcc_s.so.1 [0x2ba4b212e392]
   /lib/libgcc_s.so.1(_Unwind_ForcedUnwind+0xac) [0x2ba4b212e65c]
   /lib/libpthread.so.0(__pthread_unwind+0x40) [0x2ba4b1b7abe0]
   /lib/libpthread.so.0 [0x2ba4b1b752ab]
   /lib/libpthread.so.0 [0x2ba4b1b7c410]
   /lib/libpthread.so.0(recvfrom+0x70) [0x2ba4b1b7b640]
   /usr/lib/libpcap.so.0.7(pcap_read+0x81) [0x2ba4b1c8a071]
   /usr/lib/libpcap.so.0.7(pcap_next+0x1c) [0x2ba4b1c8b70c]
   /usr/sbin/guessnet [0x42513f]
   /lib/libpthread.so.0 [0x2ba4b1b75f1a]
   /lib/libc.so.6(__clone+0x72) [0x2ba4b22fc612]
terminate called without an active exception
./guessnet-debug: line 6:  4929 Aborted                 /usr/sbin/guessnet -v --debug  <<EOF
debugEntry peer 192.168.0.1
EOF

The result does not depend on the choice of IP address "192.168.0.1". 

If you need more appropriate infomation, please let me know.


Sincerely
TANAKA Atushi

-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-2-amd64
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages guessnet depends on:
ii  libc6                        2.3.6.ds1-8 GNU C Library: Shared libraries
ii  libgcc1                      1:4.1.1-19  GCC support library
ii  libnet1                      1.1.2.1-2   library for the construction and h
ii  libpcap0.7                   0.7.2-7     System interface for user-level pa
ii  libstdc++6                   4.1.1-19    The GNU Standard C++ Library v3

guessnet recommends no packages.

-- no debconf information

Message #10 received at 400866@bugs.debian.org (full text, mbox, reply):

From: Alexander B�rger <acfb@users.sf.net>

To: Debian Bug Tracking System <400866@bugs.debian.org>

Subject: guessnet: does not work for amd64 either

Date: Thu, 21 Dec 2006 11:59:56 +0000

Package: guessnet
Version: 0.41-1
Followup-For: Bug #400866


There is an exception from pcap_next in line 149 of Netwatcher.cc.

-- System Information:
Debian Release: 4.0
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.19.1
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages guessnet depends on:
ii  libc6                        2.3.6.ds1-9 GNU C Library: Shared libraries
ii  libgcc1                      1:4.1.1-21  GCC support library
ii  libnet1                      1.1.2.1-2   library for the construction and h
ii  libpcap0.7                   0.7.2-7     System interface for user-level pa
ii  libstdc++6                   4.1.1-21    The GNU Standard C++ Library v3

guessnet recommends no packages.

-- no debconf information

Message #15 received at 400866@bugs.debian.org (full text, mbox, reply):

From: Marcus Better <marcus@better.se>

To: 400866@bugs.debian.org

Subject: guessnet: Caught unexpected expectation

Date: Wed, 7 Mar 2007 16:49:18 +0100

[Message part 1 (text/plain, inline)]

I have the same problem. This is a Thinkpad R60 with Intel Core 2 Duo running Debian/amd64.

~# uname -a
Linux melech 2.6.20-melech #1 SMP Mon Feb 19 11:33:33 CET 2007 x86_64 GNU/Linux

~# ifup -v eth0
Running mapping script guessnet-ifupdown on eth0
guessnet: 1 candidate profiles
guessnet: Starting peer test subsystem
guessnet: Sending 10 ARP probes, 1 every second...
Caught unexpected exception, 15 stack frames unwound:
   guessnet-ifupdown [0x43a583]
   /usr/lib/libstdc++.so.6 [0x2b5cff1ef5e6]
   /usr/lib/libstdc++.so.6 [0x2b5cff1ef603]
   /usr/lib/libstdc++.so.6(__gxx_personality_v0+0x472) [0x2b5cff1ef562]
   /lib/libgcc_s.so.1 [0x2b5cff4be392]
   /lib/libgcc_s.so.1(_Unwind_ForcedUnwind+0xac) [0x2b5cff4be65c]
   /lib/libpthread.so.0(__pthread_unwind+0x40) [0x2b5cfef0abe0]
   /lib/libpthread.so.0 [0x2b5cfef052ab]
   /lib/libpthread.so.0 [0x2b5cfef0c410]
   /lib/libpthread.so.0(recvfrom+0x70) [0x2b5cfef0b640]
   /usr/lib/libpcap.so.0.7(pcap_read+0x81) [0x2b5cff01a071]
   /usr/lib/libpcap.so.0.7(pcap_next+0x1c) [0x2b5cff01b70c]
   guessnet-ifupdown [0x42513f]
   /lib/libpthread.so.0 [0x2b5cfef05f1a]
   /lib/libc.so.6(__clone+0x72) [0x2b5cff68c602]
terminate called without an active exception
Ignoring unknown interface eth0=eth0.

[Message part 2 (application/pgp-signature, inline)]

Message #24 received at 400866@bugs.debian.org (full text, mbox, reply):

From: Enrico Zini <enrico@enricozini.org>

To: 400866@bugs.debian.org

Subject: Reproduced

Date: Mon, 19 Mar 2007 15:04:49 +0000

[Message part 1 (text/plain, inline)]

Hello,

I managed to reproduce and find a fix.

What happened here is that somehow thread semantics have changed, and
now a thread gets canceled with a very strange type of exception,
somehow described in [1].

This exception didn't interact well with some throw() clauses in
guessnet code, causing the unexpected exception behaviour to happen.

This indeed renders guessnet mostly unusable, as when a test succeeds
cancelation is used to stop all the other running tests.

I committed a fix and I'm about to upload a fixed version.


Ciao,

Enrico

[1] http://groups.google.com/group/comp.programming.threads/browse_thread/thread/652bcf186fbbf697/f63757846514e5e5
-- 
GPG key: 1024D/797EBFAB 2000-12-05 Enrico Zini <enrico@debian.org>

[signature.asc (application/pgp-signature, inline)]

Message #29 received at 400866-close@bugs.debian.org (full text, mbox, reply):

From: Enrico Zini <enrico@debian.org>

To: 400866-close@bugs.debian.org

Subject: Bug#400866: fixed in guessnet 0.42-1

Date: Mon, 19 Mar 2007 15:32:02 +0000

Source: guessnet
Source-Version: 0.42-1

We believe that the bug you reported is fixed in the latest version of
guessnet, which is due to be installed in the Debian FTP archive:

guessnet_0.42-1.dsc
  to pool/main/g/guessnet/guessnet_0.42-1.dsc
guessnet_0.42-1.tar.gz
  to pool/main/g/guessnet/guessnet_0.42-1.tar.gz
guessnet_0.42-1_amd64.deb
  to pool/main/g/guessnet/guessnet_0.42-1_amd64.deb



A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 400866@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Enrico Zini <enrico@debian.org> (supplier of updated guessnet package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Format: 1.7
Date: Mon, 19 Mar 2007 15:00:13 +0000
Source: guessnet
Binary: guessnet
Architecture: source amd64
Version: 0.42-1
Distribution: unstable
Urgency: high
Maintainer: enrico@debian.org
Changed-By: Enrico Zini <enrico@debian.org>
Description: 
 guessnet   - Guess which LAN a network device is connected to
Closes: 400866
Changes: 
 guessnet (0.42-1) unstable; urgency=high
 .
   * Remove throw() handlers to allow the new strange new exception raised by
     thread cancellation to do its job.  Closes: #400866.
   * Urgency is high as this bug makes guessnet mostly unusable.  Changes since
     0.41-1 have been kept to a minimum.
Files: 
 ec4930b8178603e53e8cb4a0ae4d91b9 731 net optional guessnet_0.42-1.dsc
 82ffe1a3fab09a2927b1eed2d4c1b044 195971 net optional guessnet_0.42-1.tar.gz
 cfadf16a7f11d8784891e33e547c880d 298892 net optional guessnet_0.42-1_amd64.deb

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