Bug#776172: vlc: crash (segmentation fault) on a webm file

[Vincent Lefevre]

Package: vlc
Version: 2.2.0~rc2-2
Severity: important

vlc crashed on a webm file. The full backtrace:

(gdb) bt full
#0  0x00007f56945ed937 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#1  0x00007f56945ee319 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#2  0x00007f5694535e19 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#3  0x00007f569453be15 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#4  0x00007f56944dc3f8 in avcodec_default_execute2 ()
   from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#5  0x00007f569453f8f3 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#6  0x00007f5694448c76 in ?? () from /usr/lib/x86_64-linux-gnu/libavcodec.so.56
No symbol table info available.
#7  0x00007f56d4b640a4 in start_thread (arg=0x7f56920eb700)
    at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f56920eb700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140009794352896, 
                752477466251342829, 0, 140010919276640, 140009973917120, 
                140009794352896, -802640904524024851, -802486085010607123}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, 
            data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f56d4694ccd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

Perhaps a bug in libavcodec56.

Note: for some reason, I can't give you any information on the
webm file in question before a few days.

-- System Information:
Debian Release: 8.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages vlc depends on:
ii  fonts-freefont-ttf          20120503-4
ii  libaa1                      1.4p5-43
ii  libavcodec56                6:11.2-1
ii  libavutil54                 6:11.2-1
ii  libc6                       2.19-13
ii  libcaca0                    0.99.beta19-2
ii  libegl1-mesa [libegl1-x11]  10.4.2-2
ii  libfreerdp-cache1.1         1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-client1.1        1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-codec1.1         1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-core1.1          1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-crypto1.1        1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-gdi1.1           1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-locale1.1        1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-rail1.1          1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreerdp-utils1.1         1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libfreetype6                2.5.2-2
ii  libfribidi0                 0.19.6-3
ii  libgcc1                     1:4.9.2-10
ii  libgl1-mesa-glx [libgl1]    10.4.2-2
ii  libgles1-mesa [libgles1]    10.4.2-2
ii  libgles2-mesa [libgles2]    10.4.2-2
ii  libice6                     2:1.0.9-1+b1
ii  libpulse0                   5.0-13
ii  libqtcore4                  4:4.8.6+git64-g5dc8b2b+dfsg-2+b1
ii  libqtgui4                   4:4.8.6+git64-g5dc8b2b+dfsg-2+b1
ii  libsdl-image1.2             1.2.12-5+b5
ii  libsdl1.2debian             1.2.15-10+b1
ii  libsm6                      2:1.2.2-1+b1
ii  libstdc++6                  4.9.2-10
ii  libva-drm1                  1.4.1-1
ii  libva-x11-1                 1.4.1-1
ii  libva1                      1.4.1-1
ii  libvlccore8                 2.2.0~rc2-2
ii  libvncclient0               0.9.9+dfsg-6.1
ii  libwinpr-rpc0.1             1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libwinpr-sspi0.1            1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libwinpr-utils0.1           1.1.0~git20140921.1.440916e+dfsg1-2+b1
ii  libx11-6                    2:1.6.2-3
ii  libxcb-composite0           1.10-3+b1
ii  libxcb-keysyms1             0.4.0-1
ii  libxcb-randr0               1.10-3+b1
ii  libxcb-render0              1.10-3+b1
ii  libxcb-shape0               1.10-3+b1
ii  libxcb-shm0                 1.10-3+b1
ii  libxcb-xfixes0              1.10-3+b1
ii  libxcb-xv0                  1.10-3+b1
ii  libxcb1                     1.10-3+b1
ii  libxext6                    2:1.3.3-1
ii  libxinerama1                2:1.1.3-1+b1
ii  libxpm4                     1:3.5.11-1+b1
ii  vlc-nox                     2.2.0~rc2-2
ii  zlib1g                      1:1.2.8.dfsg-2+b1

Versions of packages vlc recommends:
pn  vlc-plugin-notify  <none>
ii  vlc-plugin-samba   2.2.0~rc2-2
ii  xdg-utils          1.1.0~rc1+git20111210-7.3

Versions of packages vlc suggests:
ii  videolan-doc  20070626-1

-- no debconf information