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Bug#378753: marked as done (tetex-bin: texshow sometimes segfaults)

Your message dated Mon, 24 Mar 2008 12:51:21 +0100
with message-id <20080324115121.GA6027@preusse-16223.user.cis.dfn.de>
and subject line Re: Bug#378753: tetex-bin: texshow sometimes segfaults
has caused the Debian Bug report #378753,
regarding tetex-bin: texshow sometimes segfaults
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
378753: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=378753
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: tetex-bin
Version: 3.0-17
Severity: normal

A few moments ago I found "texshow" in the help section of my window
manager and wanted to try it out, which did not produce any screen
output (i.e. no window appeared). Subsequent search turned out, that
the menu entry calls
/usr/bin/texshow

Running it from an xterm seemed to work at first. But sometimes it
crashes also:
helge@remaxp:~$ /usr/bin/texshow 

  TeXShow-XML 0.2 beta / Taco Hoekwater 2004

             interface : cont-en

                status : searching for setup files
                status : loading setups
                status : loading 'cont-cz' took 0.022478 seconds
                status : loading 'cont-de' took 0.021468 seconds
                status : loading 'cont-it' took 0.021893 seconds
                status : loading 'cont-nl' took 0.021685 seconds
                status : loading 'cont-ro' took 0.02173 seconds
                status : loading 'cont-en' took 0.02171 seconds
                status : initializing display
*** glibc detected *** malloc(): memory corruption: 0x0000000000f784f0 ***
/usr/bin/texshow: line 22: 25369 Abgebrochen             perl "$p" ${1+"$@"}

(Abgebrochen == Aborted)

I tried to figure out a pattern when it starts and when it does not,
but failed.  The point of the memory corruption varies from call to
call, btw.:
*** glibc detected *** malloc(): memory corruption: 0x0000000000f7cfa0 ***
*** glibc detected *** malloc(): memory corruption: 0x0000000000f7fb90 ***
*** glibc detected *** malloc(): memory corruption: 0x0000000000f77ba0 ***

(but not the line number, i.e. 22).

I figured out, what was actually called (I use bash as sh):
perl /usr/share/texmf-tetex/scripts/context/perl/texshow.pl

Unfortunately, now I don't get a line number:
helge@remaxp:~$ perl /usr/share/texmf-tetex/scripts/context/perl/texshow.pl

  TeXShow-XML 0.2 beta / Taco Hoekwater 2004

             interface : cont-en

                status : searching for setup files
                status : loading setups
                status : loading 'cont-cz' took 0.022417 seconds
                status : loading 'cont-de' took 0.022009 seconds
                status : loading 'cont-it' took 0.022181 seconds
                status : loading 'cont-nl' took 0.021942 seconds
                status : loading 'cont-ro' took 0.021467 seconds
                status : loading 'cont-en' took 0.021812 seconds
                status : initializing display
*** glibc detected *** malloc(): memory corruption: 0x0000000000f85770 ***
Abgebrochen

It dies in 
  show_command ($command);

When I add the line 
  print "After setup $command\n";
before this line in texshow.pl it seems to work properly always.

But $command is empty, i.e. this line prints:
After setup 

Please tell me what else to try to narrow this down. 

Could this be related to me using grsec? 


-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.14.6-grsec-cz02
Locale: LANG=de_DE@euro, LC_CTYPE=de_DE@euro (charmap=ISO-8859-15)

Versions of packages tetex-bin depends on:
ii  debconf [debconf-2.0]     1.5.2          Debian configuration management sy
ii  debianutils               2.16.2         Miscellaneous utilities specific t
ii  dialog                    1.0-20060221-1 Displays user-friendly dialog boxe
ii  dpkg                      1.13.21        package maintenance system for Deb
ii  ed                        0.2-20         The classic unix line editor
ii  libc6                     2.3.6-15       GNU C Library: Shared libraries
ii  libfontconfig1            2.3.2-7        generic font configuration library
ii  libfreetype6              2.2.1-2        FreeType 2 font engine, shared lib
ii  libgcc1                   1:4.1.1-5      GCC support library
ii  libice6                   1:1.0.0-3      X11 Inter-Client Exchange library
ii  libjpeg62                 6b-13          The Independent JPEG Group's JPEG 
ii  libkpathsea4              3.0-17         path search library for teTeX (run
ii  libpaper1                 1.1.19         Library for handling paper charact
ii  libpng12-0                1.2.8rel-5.1   PNG library - runtime
ii  libpoppler0c2             0.4.5-4.1      PDF rendering library
ii  libsm6                    1:1.0.0-4      X11 Session Management library
ii  libstdc++6                4.1.1-5        The GNU Standard C++ Library v3
ii  libt1-5                   5.1.0-2        Type 1 font rasterizer library - r
ii  libx11-6                  2:1.0.0-7      X11 client-side library
ii  libxaw7                   1:1.0.1-5      X11 Athena Widget library
ii  libxext6                  1:1.0.0-4      X11 miscellaneous extension librar
ii  libxmu6                   1:1.0.1-3      X11 miscellaneous utility library
ii  libxpm4                   1:3.5.4.2-3    X11 pixmap library
ii  libxt6                    1:1.0.0-5      X11 toolkit intrinsics library
ii  mime-support              3.36-1         MIME files 'mime.types' & 'mailcap
ii  perl                      5.8.8-4        Larry Wall's Practical Extraction 
ii  sed                       4.1.5-1        The GNU sed stream editor
ii  tetex-base                3.0-19         Basic library files of teTeX
ii  ucf                       2.0012         Update Configuration File: preserv
ii  whiptail                  0.52.2-4       Displays user-friendly dialog boxe
ii  zlib1g                    1:1.2.3-11     compression library - runtime

Versions of packages tetex-bin recommends:
ii  libxml-parser-perl           2.34-4      Perl module for parsing XML files
ii  perl-tk                      1:804.027-5 Perl module providing the Tk graph
ii  psutils                      1.17-23     A collection of PostScript documen

Versions of packages tetex-base depends on:
ii  tex-common                    0.25       Common infrastructure for using an
ii  ucf                           2.0012     Update Configuration File: preserv

Versions of packages tetex-extra depends on:
ii  tetex-base                    3.0-19     Basic library files of teTeX
ii  ucf                           2.0012     Update Configuration File: preserv

-- debconf information:
  tetex-base/olddat: true
  tetex-base/fmtutil-failed:
  tetex-bin/cnf_name:
  tetex-base/oldupdm:
  tetex-base/updmap-failed:
-- 
      Dr. Helge Kreutzmann                     debian@helgefjell.de
           Dipl.-Phys.                   http://www.helgefjell.de/debian.php
        64bit GNU powered                     gpg signed mail preferred
           Help keep free software "libre": http://www.ffii.de/

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--- Begin Message --- 
Version: 2008.01.28-1

On 18.07.06 Helge Kreutzmann (debian@helgefjell.de) wrote:

> Package: tetex-bin
> Version: 3.0-17
> Severity: normal
> 
> A few moments ago I found "texshow" in the help section of my window
> manager and wanted to try it out, which did not produce any screen
> output (i.e. no window appeared). Subsequent search turned out, that
> the menu entry calls
> /usr/bin/texshow
> 
<snip>
> 
> *** glibc detected *** malloc(): memory corruption: 0x0000000000f784f0 ***
> /usr/bin/texshow: line 22: 25369 Abgebrochen             perl "$p" ${1+"$@"}
> 
> (Abgebrochen == Aborted)
> 
This could have been rather a bug in glibc/perl, which could have been
fixed meanwhile. If the problem re-occurs with a recent texshow file
a bug against context and we decide then how to proceed.

Hilmar 
-- 
sigmentation fault

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