Debian Bug report logs - #498647
program that links against libavcodec and does nothing segfaults on mips

Toggle useless messages

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

From: peter green <plugwash@p10link.net>

To: submit@bugs.debian.org

Subject: program that links against libavcodec and does nothing segfaults on mips

Date: Thu, 11 Sep 2008 20:31:47 +0100

package: libavcodec-dev
severity: serious
justification: probable cause of 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=498397

donothing.c contains the following code (the segfault also happens 
without the printf statement I just added it to test if it happened 
before or after main ran)

#include <stdio.h>
int main() {
 printf("doing nothing\n");
 return 0;
}

debian-mips:~# gcc donothing.c -o donothing
debian-mips:~# ./donothing
doing nothing
debian-mips:~# gcc donothing.c -o donothing -lavcodec
debian-mips:~# ./donothing
doing nothing
Segmentation fault
debian-mips:~# gdb ./donothing
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "mips-linux-gnu"...
(gdb) run
Starting program: /root/donothing
[Thread debugging using libthread_db enabled]
doing nothing
[New Thread 0x2b460210 (LWP 8890)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2b460210 (LWP 8890)]
0x2ab9b26c in do_free ()
   at /build/buildd/ffmpeg-debian-0.svn20080206/libavcodec/utils.c:108
108     /build/buildd/ffmpeg-debian-0.svn20080206/libavcodec/utils.c: No 
such file or directory.
       in /build/buildd/ffmpeg-debian-0.svn20080206/libavcodec/utils.c
(gdb) bt
#0  0x2ab9b26c in do_free ()
   at /build/buildd/ffmpeg-debian-0.svn20080206/libavcodec/utils.c:108
#1  0x2aaeb104 in _ftext () from /usr/lib/libavcodec.so.51
#2  0x2ae1cf80 in _fini () from /usr/lib/libavcodec.so.51
#3  0x2aab8c40 in _dl_fini () from /lib/ld.so.1
#4  0x2aff62e0 in exit () from /lib/libc.so.6
#5  0x2afd8894 in __libc_start_main () from /lib/libc.so.6
#6  0x00400718 in _ftext ()
(gdb)

Message #10 received at 498647@bugs.debian.org (full text, mbox, reply):

From: Reinhard Tartler <siretart@tauware.de>

To: Christophe Mutricy <xtophe@chewa.net>

Cc: 498216@bugs.debian.org, 498397@bugs.debian.org, 498647@bugs.debian.org

Subject: Re: Bug#498216: ffmpeg, mplayer (mipsel/loongson2f) stops with the error message "Segmentation fault." and fix patch

Date: Sat, 13 Sep 2008 08:44:43 +0200

Christophe Mutricy <xtophe@chewa.net> writes:

> Sorry to be horribly pragmatic and short-sighted. but if 刘世伟's patch
> *does* fix the issue on mips an mipsel and allow package linking libavcodec 
> to not segfault and not FTBFS (thinking of vlc) then i think it should
> be commited and a -13 uploaded. 

In principle yes, but I'm still waiting for confirmation if not also a
mere rebuild of the ffmpeg-debian was sufficient. In that case, we would
only have to request binNMUs for the package.

Moreover, I think that actually bugs #498647, #498216 and #498397 are
the same bugs.

-- 
Gruesse/greetings,
Reinhard Tartler, KeyID 945348A4

Message #15 received at 498647@bugs.debian.org (full text, mbox, reply):

From: Fabian Greffrath <greffrath@leat.rub.de>

To: Reinhard Tartler <siretart@tauware.de>, 498647@bugs.debian.org

Cc: Christophe Mutricy <xtophe@chewa.net>, 498397@bugs.debian.org, 498216@bugs.debian.org

Subject: Re: Bug#498647: Bug#498216: ffmpeg, mplayer (mipsel/loongson2f) stops with the error message "Segmentation fault." and fix patch

Date: Mon, 15 Sep 2008 09:18:52 +0200

Reinhard Tartler schrieb:
> In principle yes, but I'm still waiting for confirmation if not also a
> mere rebuild of the ffmpeg-debian was sufficient. In that case, we would
> only have to request binNMUs for the package.

We need a new upload anyway because of #498764. However, it would 
still be nice if the bugs would resolve without patching.

-- 
Dipl.-Phys. Fabian Greffrath

Ruhr-Universität Bochum
Lehrstuhl für Energieanlagen und Energieprozesstechnik (LEAT)
Universitätsstr. 150, IB 3/134
D-44780 Bochum

Telefon: +49 (0)234 / 32-26334
Fax:     +49 (0)234 / 32-14227
E-Mail:  greffrath@leat.ruhr-uni-bochum.de

Message #22 received at 498647@bugs.debian.org (full text, mbox, reply):

From: Reinhard Tartler <siretart@tauware.de>

To: control@bugs.debian.org

Cc: 498216@bugs.debian.org, 498397@bugs.debian.org, 498647@bugs.debian.org

Subject: setting package to libpostproc51 libpostproc-dev libavcodec51 ffmpeg libavdevice52 libavcodec-dev ffmpeg-doc libavdevice-dev ffmpeg-debian libavutil49 ffmpeg-dbg libavformat52 libavformat-dev libswscale0 libswscale-dev libavutil-dev ...

Date: Sun, 21 Sep 2008 18:39:29 +0200

# Automatically generated email from bts, devscripts version 2.10.26ubuntu12
#
# ffmpeg-debian (0.svn20080206-13) unstable; urgency=low
#
#  * Since gcc-4.3 mips/mipsel needs an explicit PIC flag for shared library
#    code. (Closes: #498216, 498647, 498397)
#

package libpostproc51 libpostproc-dev libavcodec51 ffmpeg libavdevice52 libavcodec-dev ffmpeg-doc libavdevice-dev ffmpeg-debian libavutil49 ffmpeg-dbg libavformat52 libavformat-dev libswscale0 libswscale-dev libavutil-dev
tags 498647 + pending
tags 498216 + pending
tags 498397 + pending

Message #29 received at 498647-close@bugs.debian.org (full text, mbox, reply):

From: Reinhard Tartler <siretart@tauware.de>

To: 498647-close@bugs.debian.org

Subject: Bug#498647: fixed in ffmpeg-debian 0.svn20080206-13

Date: Mon, 22 Sep 2008 07:02:05 +0000

Source: ffmpeg-debian
Source-Version: 0.svn20080206-13

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

ffmpeg-dbg_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/ffmpeg-dbg_0.svn20080206-13_i386.deb
ffmpeg-debian_0.svn20080206-13.diff.gz
  to pool/main/f/ffmpeg-debian/ffmpeg-debian_0.svn20080206-13.diff.gz
ffmpeg-debian_0.svn20080206-13.dsc
  to pool/main/f/ffmpeg-debian/ffmpeg-debian_0.svn20080206-13.dsc
ffmpeg-doc_0.svn20080206-13_all.deb
  to pool/main/f/ffmpeg-debian/ffmpeg-doc_0.svn20080206-13_all.deb
ffmpeg_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/ffmpeg_0.svn20080206-13_i386.deb
libavcodec-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavcodec-dev_0.svn20080206-13_i386.deb
libavcodec51_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavcodec51_0.svn20080206-13_i386.deb
libavdevice-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavdevice-dev_0.svn20080206-13_i386.deb
libavdevice52_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavdevice52_0.svn20080206-13_i386.deb
libavformat-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavformat-dev_0.svn20080206-13_i386.deb
libavformat52_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavformat52_0.svn20080206-13_i386.deb
libavutil-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavutil-dev_0.svn20080206-13_i386.deb
libavutil49_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libavutil49_0.svn20080206-13_i386.deb
libpostproc-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libpostproc-dev_0.svn20080206-13_i386.deb
libpostproc51_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libpostproc51_0.svn20080206-13_i386.deb
libswscale-dev_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libswscale-dev_0.svn20080206-13_i386.deb
libswscale0_0.svn20080206-13_i386.deb
  to pool/main/f/ffmpeg-debian/libswscale0_0.svn20080206-13_i386.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 498647@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Reinhard Tartler <siretart@tauware.de> (supplier of updated ffmpeg-debian 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: 1.8
Date: Sun, 21 Sep 2008 17:03:50 +0200
Source: ffmpeg-debian
Binary: ffmpeg ffmpeg-dbg ffmpeg-doc libavutil49 libavcodec51 libavdevice52 libpostproc51 libavformat52 libswscale0 libavutil-dev libavcodec-dev libavdevice-dev libpostproc-dev libavformat-dev libswscale-dev
Architecture: all i386 source 
Version: 0.svn20080206-13
Distribution: unstable
Urgency: low
Maintainer: Debian multimedia packages maintainers <pkg-multimedia-maintainers@lists.alioth.debian.org>
Changed-By: Reinhard Tartler <siretart@tauware.de>
Closes: 498216 498397 498647
Description:
 ffmpeg-dbg - Debug symbols for ffmpeg related packages
 ffmpeg-doc - documentation of the ffmpeg API
 ffmpeg     - multimedia player, server and encoder
 libavcodec51 - ffmpeg codec library
 libavcodec-dev - development files for libavcodec
 libavdevice52 - ffmpeg device handling library
 libavdevice-dev - development files for libavdevice
 libavformat52 - ffmpeg file format library
 libavformat-dev - development files for libavformat
 libavutil49 - ffmpeg utility library
 libavutil-dev - development files for libavutil
 libpostproc51 - ffmpeg video postprocessing library
 libpostproc-dev - development files for libpostproc
 libswscale0 - ffmpeg video scaling library
 libswscale-dev - development files for libswscale
Changes:
 ffmpeg-debian (0.svn20080206-13) unstable; urgency=low
 .
   [Thiemo Seufer]
   * compile shared libavcodec explicitly with $(PIC), since gcc-4.3
     mips/mipsel needs an explicit PIC flag for shared library
     code.
 .
     Until gcc-4.2 Linux/MIPS always used PIC code, even for executables.
     This changed with gcc-4.3, and with it the compiler default changed
     to non-PIC. As a result, -fPIC now needs to be explicitly supplied
     for shared library builds.
 .
     (Closes: #498216, 498647, 498397)
Checksums-Sha1: 
 5eafbcec566b8c1e3c9f88b7cbb3ab2f2a25604c 155740 libswscale0_0.svn20080206-13_i386.deb
 5fbf982178f8cccb8f64ff4234c4fb350ff63985 1960634 libavcodec-dev_0.svn20080206-13_i386.deb
 682afd17450243299994223ca71ab42ba6528ad1 46976 libavdevice-dev_0.svn20080206-13_i386.deb
 808548d86143496722eecb46b88143f50b498f66 387872 libavformat-dev_0.svn20080206-13_i386.deb
 8424d8342b61d818b8de48606760b687bd8f66ef 7999536 ffmpeg-dbg_0.svn20080206-13_i386.deb
 8e2bbf2774be139e6f9dbd373a7dcb4c541c0bba 12114292 ffmpeg-doc_0.svn20080206-13_all.deb
 195c005e8b346d5741a12065e241037f82d76a5c 2092 ffmpeg-debian_0.svn20080206-13.dsc
 985badde6debe0a732bda78b25f4213f4557f7b6 622832 libavformat52_0.svn20080206-13_i386.deb
 addcfdbbf9d004bb93fe90bc661d3d210ae1e530 235178 ffmpeg_0.svn20080206-13_i386.deb
 b3f1281c268b15feeaa0f225afeae4911b3a4c99 75808 libavutil49_0.svn20080206-13_i386.deb
 d4d87603bc11e3e1742847cc9980beb3a70fe419 66666 libavutil-dev_0.svn20080206-13_i386.deb
 d63504facf68dabfc17faccb4a2b213560417384 69506 libpostproc51_0.svn20080206-13_i386.deb
 dea20afd6848f1556f89644af02f099b1a40e602 98754 libswscale-dev_0.svn20080206-13_i386.deb
 e00f01c637996d403f155c5ca7760333608a50e8 28560 ffmpeg-debian_0.svn20080206-13.diff.gz
 e8fc88674a842c503539166c250a35a24ea3916d 3503882 libavcodec51_0.svn20080206-13_i386.deb
 e940e97188b5e54c1dfa6b9aedd685f16d8f8f8d 60702 libavdevice52_0.svn20080206-13_i386.deb
 fbffca5abbf21c081afea1f68483adf37012a6c4 51182 libpostproc-dev_0.svn20080206-13_i386.deb
Checksums-Sha256: 
 00a5864cd659647a0cb04d05dd54e7a7efd80ddc39838609a16e429b2a777111 60702 libavdevice52_0.svn20080206-13_i386.deb
 0d56f9769ec11e2161c5680815c73c86ccb1fc8e7ee7e8d93d1f8c9d04c9aeae 98754 libswscale-dev_0.svn20080206-13_i386.deb
 10d814805bdb6f0ea815df5acf13ba06ccdfa241bf6c6392eb1c8e330c52dfe6 75808 libavutil49_0.svn20080206-13_i386.deb
 30188386aa3eba7399fd2311550d460fdc3b2c9cc75d37053e388f6d4a663546 3503882 libavcodec51_0.svn20080206-13_i386.deb
 3f8731a3a4d0490dfe95701ed1e7c1be2d83f5a196c30ace8bb46f3c9651eafc 387872 libavformat-dev_0.svn20080206-13_i386.deb
 4cc5d9c18bb2eca396d635b1fe489055a98f90f7e65ef40d819848a391a4603c 7999536 ffmpeg-dbg_0.svn20080206-13_i386.deb
 53d33e4a6b31d48cda01622d403ce78ec6d75cbba00506b5e52cbb51c0e8658a 51182 libpostproc-dev_0.svn20080206-13_i386.deb
 634b32218c8eb370fbabb9b878bc8a963c5d5e3ab00e31004cbad4562a7f0d78 28560 ffmpeg-debian_0.svn20080206-13.diff.gz
 64c7b01c1508e5e948ada4b1d90894667b3416dd907946d2ea931ba50e585d39 622832 libavformat52_0.svn20080206-13_i386.deb
 77bf5b88d416e50f9b7612de84fa96249ebb329b0954be1051ef6896817391c3 12114292 ffmpeg-doc_0.svn20080206-13_all.deb
 9c43eb2236cdacc8e5d34b100444d3174a8d12fa6c77dec26f5918e057932f83 46976 libavdevice-dev_0.svn20080206-13_i386.deb
 90470cb11b8a3df88d5ed0680089ff8dc803f98bd81e8169ea3bea07b08f74cd 2092 ffmpeg-debian_0.svn20080206-13.dsc
 b2f69ab760938b876679430c3dfa2729a6282fd97105cfe7991e8b9c70c5f762 66666 libavutil-dev_0.svn20080206-13_i386.deb
 bbcefe8f3de84cdae12111b6b925b82c27f6ba38f4eb20acbedaa59471a56faf 235178 ffmpeg_0.svn20080206-13_i386.deb
 becd2ed367f7ed34cc8b0f794e0e2b91447f15f8df5277f4e606b6387ae6b6df 155740 libswscale0_0.svn20080206-13_i386.deb
 d817bc320085a64ec1b97f83997a501f8a4807cf8e1f63243539cc7d736c4eeb 69506 libpostproc51_0.svn20080206-13_i386.deb
 fbc947ebc1880e988ab4359f4991b5a055956fc9f63692b17b462dbe0afc0dcf 1960634 libavcodec-dev_0.svn20080206-13_i386.deb
Files: 
 0f09210a6b9015f48c2f483ac456c9ad 155740 libs optional libswscale0_0.svn20080206-13_i386.deb
 1ff04bce04cc06ea32291386d89e1b52 60702 libs optional libavdevice52_0.svn20080206-13_i386.deb
 3047bc33bc380056da38930cbe080d22 7999536 libs extra ffmpeg-dbg_0.svn20080206-13_i386.deb
 35c5ea7ab989462add46c043e98d87cd 28560 libs optional ffmpeg-debian_0.svn20080206-13.diff.gz
 3a385b34c295dd6d368ef5830cea2c77 387872 libdevel optional libavformat-dev_0.svn20080206-13_i386.deb
 3e8a89e02dfd23907be13ba012b4d079 51182 libdevel optional libpostproc-dev_0.svn20080206-13_i386.deb
 eb7a9d1a42504306e1d0ce4dfbf87c4d 2092 libs optional ffmpeg-debian_0.svn20080206-13.dsc
 5d51efb35aed25bf1cc0357b0d2de458 98754 libdevel optional libswscale-dev_0.svn20080206-13_i386.deb
 822f9590433f28e23a22af5e3ae51b08 235178 graphics optional ffmpeg_0.svn20080206-13_i386.deb
 82920849a086eeb5eb93fe6490b30782 12114292 doc optional ffmpeg-doc_0.svn20080206-13_all.deb
 b1a59a25448ca6c1c1b4cd8669fd113d 75808 libs optional libavutil49_0.svn20080206-13_i386.deb
 b3dc658781d0bb91387dee46b6ff3b66 46976 libdevel optional libavdevice-dev_0.svn20080206-13_i386.deb
 bc8acde487eb1c0dc878ef74b3b9f5d9 1960634 libdevel optional libavcodec-dev_0.svn20080206-13_i386.deb
 c3fb347b0fdbdf4d798f865cce76a240 69506 libs optional libpostproc51_0.svn20080206-13_i386.deb
 d018f8ce89c7918f2c7e222f260b9f5b 66666 libdevel optional libavutil-dev_0.svn20080206-13_i386.deb
 ddaff6cabbb0efe165e948c93779c9b2 622832 libs optional libavformat52_0.svn20080206-13_i386.deb
 f39a35b67ecc135019ac755ed870da35 3503882 libs optional libavcodec51_0.svn20080206-13_i386.deb

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Debian Powered!

iEYEARECAAYFAkjXPuIACgkQmAg1RJRTSKQz2wCggMF+UWmkGUBXxPHlmhpV+pe2
O0QAmwQCnYgy38RIiijU8TtYDz/883jf
=pBm2
-----END PGP SIGNATURE-----

Send a report that this bug log contains spam.