Package: vlc-nox
Version: 1.1.3-1squeeze2
Severity: normal

Upgrading gives the following error:

Setting up vlc-nox (1.1.3-1squeeze2) ...
Segmentation fault
dpkg: error processing vlc-nox (--configure):
 subprocess installed post-installation script returned error exit status 139

Apparently, vlc-cache-gen segfaults when processing the sdl_image plugin:

stat64("/usr/lib/vlc/plugins/codec/liblpcm_plugin.so", {st_mode=S_IFREG|0644, 
st_size=9820, ...}) = 0
open("/usr/lib/vlc/plugins/codec/liblpcm_plugin.so", O_RDONLY) = 5
read(5, 
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\220\6\0\0004\0\0\0"..., 512) = 
512
fstat64(5, {st_mode=S_IFREG|0644, st_size=9820, ...}) = 0
mmap2(NULL, 12652, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0x4687b000
mmap2(0x4687e000, 4096, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x2) = 0x4687e000
close(5)                                = 0
stat64("/usr/lib/vlc/plugins/codec/libsdl_image_plugin.so", 
{st_mode=S_IFREG|0644, st_size=6852, ...}) = 0
open("/usr/lib/vlc/plugins/codec/libsdl_image_plugin.so", O_RDONLY) = 5
read(5, 
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240\7\0\0004\0\0\0"..., 512) = 
512
fstat64(5, {st_mode=S_IFREG|0644, st_size=6852, ...}) = 0
mmap2(NULL, 9628, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0x4747a000
mmap2(0x4747c000, 4096, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x1) = 0x4747c000
close(5)                                = 0
open("/etc/ld.so.cache", O_RDONLY)      = 5
fstat64(5, {st_mode=S_IFREG|0644, st_size=50711, ...}) = 0
mmap2(NULL, 50711, PROT_READ, MAP_PRIVATE, 5, 0) = 0x4686e000
close(5)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/usr/lib/libSDL_image-1.2.so.0", O_RDONLY) = 5
read(5, 
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\30\0\0004\0\0\0"..., 512) 
= 512
fstat64(5, {st_mode=S_IFREG|0644, st_size=47072, ...}) = 0
brk(0x80fe000)                          = 0x80fe000
mmap2(NULL, 113072, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0x46852000
mmap2(0x4685d000, 4096, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0xb) = 0x4685d000
mmap2(0x4685e000, 63920, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4685e000
close(5)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/usr/lib/libSDL-1.2.so.0", O_RDONLY) = 5
read(5, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0p]\0\0004\0\0\0"..., 
512) = 512
fstat64(5, {st_mode=S_IFREG|0644, st_size=421876, ...}) = 0
mmap2(NULL, 720688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) = 
0x467a2000
mmap2(0x46808000, 8192, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x65) = 0x46808000
mmap2(0x4680a000, 294704, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4680a000
mprotect(0x4946b000, 3840, PROT_READ|PROT_WRITE) = -1 EACCES (Permission denied)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
zsh: segmentation fault  strace -f /usr/lib/vlc/vlc-cache-gen 
/usr/lib/vlc/plugins

Note the mprotect() error, as logged by the kernel:

[1607219.198034] grsec: denied RWX mprotect of /lib/ld-2.11.2.so by
/usr/lib/vlc/vlc-cache-gen[vlc-cache-gen:15667] uid/euid:0/0 gid/egid:0/0,
parent /var/lib/dpkg/info/vlc-nox.postinst[vlc-nox.postins:15666] uid/euid:0/0 
gid/egid:0/0

Disabling the mprotect() restriction feature makes the problem go away.

FWIW, a gdb backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x50f49677 in ?? () from /lib/ld-linux.so.2
(gdb) bt
#0  0x50f49677 in ?? () from /lib/ld-linux.so.2
#1  0x50f4a134 in ?? () from /lib/ld-linux.so.2
#2  0x50f4fe9c in ?? () from /lib/ld-linux.so.2
#3  0x50f507f6 in ?? () from /lib/ld-linux.so.2
#4  0x50f4f192 in ?? () from /lib/ld-linux.so.2
#5  0x50f54b81 in ?? () from /lib/ld-linux.so.2
#6  0x50f507f6 in ?? () from /lib/ld-linux.so.2
#7  0x50f545c6 in ?? () from /lib/ld-linux.so.2
#8  0x50c8ac0b in ?? ()
#9  0x50f507f6 in ?? () from /lib/ld-linux.so.2
#10 0x50c8b09c in ?? ()
#11 0x50c8ab41 in ?? ()
#12 0x50ed0929 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Feel free to forward the bug appropriately, but:

 - Why is the dynamic loader crashing, instead of handling the error
   gracefully?
 - What's up with libSDL-1.2?
 - It sucks that installation and/or start-up of VLC fails because of
   one faulty module

-- System Information:
Debian Release: 6.0
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.36.2-grsec
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages vlc-nox depends on:
ii  liba52-0.7.4            0.7.4-14         library for decoding ATSC A/52 str
ii  libasound2              1.0.23-2.1       shared library for ALSA applicatio
ii  libass4                 0.9.9-1          library for SSA/ASS subtitles rend
ii  libavahi-client3        0.6.27-3         Avahi client library
ii  libavahi-common3        0.6.27-3         Avahi common library
ii  libavc1394-0            0.5.3-1+b2       control IEEE 1394 audio/video devi
ii  libavcodec52            4:0.5.2-6        ffmpeg codec library
ii  libavformat52           4:0.5.2-6        ffmpeg file format library
ii  libavutil49             4:0.5.2-6        ffmpeg utility library
ii  libc6                   2.11.2-10        Embedded GNU C Library: Shared lib
ii  libcaca0                0.99.beta17-1    colour ASCII art library
ii  libcddb2                1.3.2-2          library to access CDDB data - runt
ii  libcdio10               0.81-4           library to read and control CD-ROM
ii  libdbus-1-3             1.2.24-4         simple interprocess messaging syst
ii  libdc1394-22            2.1.2-3          high level programming interface f
ii  libdca0                 0.0.5-3          decoding library for DTS Coherent 
ii  libdirac-encoder0       1.0.2-3          open and royalty free high quality
ii  libdvbpsi6              0.1.7-1          library for MPEG TS and DVB PSI ta
ii  libdvdnav4              4.1.3-7          DVD navigation library
ii  libdvdread4             4.1.3-10         library for reading DVDs
ii  libebml0                0.7.7-3.1        access library for the EBML format
ii  libfaad2                2.7-6            freeware Advanced Audio Decoder - 
ii  libflac8                1.2.1-3          Free Lossless Audio Codec - runtim
ii  libfontconfig1          2.8.0-2.1        generic font configuration library
ii  libfreetype6            2.4.2-2.1        FreeType 2 font engine, shared lib
ii  libfribidi0             0.19.2-1         Free Implementation of the Unicode
ii  libgcc1                 1:4.4.5-10       GCC support library
ii  libgcrypt11             1.4.5-2          LGPL Crypto library - runtime libr
ii  libgnutls26             2.8.6-1          the GNU TLS library - runtime libr
ii  libgpg-error0           1.6-1            library for common error values an
ii  libkate1                0.3.8-1          Kate is a codec for karaoke and te
ii  liblircclient0          0.8.3-5          infra-red remote control support -
ii  liblua5.1-0             5.1.4-5          Simple, extensible, embeddable pro
ii  libmad0                 0.15.1b-5        MPEG audio decoder library
ii  libmatroska0            0.8.1-1.1        extensible open standard audio/vid
ii  libmodplug1             1:0.8.8.1-2      shared libraries for mod music bas
ii  libmpcdec6              2:0.1~r459-1     MusePack decoder - library
ii  libmpeg2-4              0.4.1-3          MPEG1 and MPEG2 video decoder libr
ii  libmtp8                 1.0.3-1          Media Transfer Protocol (MTP) libr
ii  libncursesw5            5.7+20100313-5   shared libraries for terminal hand
ii  libogg0                 1.2.0~dfsg-1     Ogg bitstream library
ii  libpng12-0              1.2.44-1         PNG library - runtime
ii  libpostproc51           4:0.5.2-6        ffmpeg video postprocessing librar
ii  libproxy0               0.3.1-2          automatic proxy configuration mana
ii  libraw1394-11           2.0.5-2          library for direct access to IEEE 
ii  libschroedinger-1.0-0   1.0.9-2          library for encoding/decoding of D
ii  libshout3               2.2.2-5+b1       MP3/Ogg Vorbis broadcast streaming
ii  libsmbclient            2:3.5.6~dfsg-4   shared library for communication w
ii  libspeex1               1.2~rc1-1        The Speex codec runtime library
ii  libstdc++6              4.4.5-10         The GNU Standard C++ Library v3
ii  libswscale0             4:0.5.2-6        ffmpeg video scaling library
ii  libtag1c2a              1.6.3-1          TagLib Audio Meta-Data Library
ii  libtheora0              1.1.1+dfsg.1-3   The Theora Video Compression Codec
ii  libtwolame0             0.3.12-1         MPEG Audio Layer 2 encoding librar
ii  libudev0                164-4            libudev shared library
ii  libupnp3                1:1.6.6-5        Portable SDK for UPnP Devices, ver
ii  libv4l-0                0.8.1-2          Collection of video4linux support 
ii  libvcdinfo0             0.7.23-4+b2      library to extract information fro
ii  libvlc5                 1.1.3-1squeeze2  multimedia player and streamer lib
ii  libvlccore4             1.1.3-1squeeze2  base library for VLC and its modul
ii  libvorbis0a             1.3.1-1          The Vorbis General Audio Compressi
ii  libvorbisenc2           1.3.1-1          The Vorbis General Audio Compressi
ii  libxml2                 2.7.8.dfsg-2     GNOME XML library
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

vlc-nox recommends no packages.

vlc-nox suggests no packages.

Versions of packages vlc depends on:
ii  libaa1                  1.4p5-38         ascii art library
ii  libc6                   2.11.2-10        Embedded GNU C Library: Shared lib
ii  libfreetype6            2.4.2-2.1        FreeType 2 font engine, shared lib
ii  libfribidi0             0.19.2-1         Free Implementation of the Unicode
ii  libgcc1                 1:4.4.5-10       GCC support library
ii  libgl1-mesa-glx [libgl1 7.7.1-4          A free implementation of the OpenG
ii  libqtcore4              4:4.6.3-4        Qt 4 core module
ii  libqtgui4               4:4.6.3-4        Qt 4 GUI module
ii  libsdl-image1.2         1.2.10-2+b2      image loading library for Simple D
ii  libsdl1.2debian         1.2.14-6.1       Simple DirectMedia Layer
ii  libstdc++6              4.4.5-10         The GNU Standard C++ Library v3
ii  libtar                  1.2.11-6         C library for manipulating tar arc
ii  libvlccore4             1.1.3-1squeeze2  base library for VLC and its modul
ii  libx11-6                2:1.3.3-4        X11 client-side library
ii  libx11-xcb1             2:1.3.3-4        Xlib/XCB interface library
ii  libxcb-keysyms1         0.3.6-1          utility libraries for X C Binding 
ii  libxcb-randr0           1.6-1            X C Binding, randr extension
ii  libxcb-shm0             1.6-1            X C Binding, shm extension
ii  libxcb-xv0              1.6-1            X C Binding, xv extension
ii  libxcb1                 1.6-1            X C Binding
ii  libxext6                2:1.1.2-1        X11 miscellaneous extension librar
ii  ttf-freefont            20090104-7       Freefont Serif, Sans and Mono True
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

Versions of packages libvlc5 depends on:
ii  libc6                    2.11.2-10       Embedded GNU C Library: Shared lib
ii  libvlccore4              1.1.3-1squeeze2 base library for VLC and its modul

Versions of packages libvlccore4 depends on:
ii  libc6                    2.11.2-10       Embedded GNU C Library: Shared lib
ii  libdbus-1-3              1.2.24-4        simple interprocess messaging syst
ii  vlc-data                 1.1.3-1squeeze2 Common data for VLC

Versions of packages vlc-nox is related to:
pn  libavutil50                   <none>     (no description available)
pn  libavutil51                   <none>     (no description available)

-- no debconf information



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