[FFmpeg-trac] #5584(undetermined:new): FFmpeg libraries leak 1MiB memory chunks on corrupt files

[FFmpeg]

#5584: FFmpeg libraries leak 1MiB memory chunks on corrupt files
-------------------------------------+-------------------------------------
             Reporter:  mocmaint     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  leak         |               Resolution:
  regression                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by mocmaint):

 FFmpeg was previously built without '--disable-debug'.  Full FFmpeg
 configure originally used is:

     CFLAGS="-O2 -fPIC" ./configure --prefix=/usr/local/stow/$(basename
 $PWD) --libdir='${prefix}/lib64' --shlibdir='${prefix}/lib64' --enable-
 shared --disable-static --disable-yasm --enable-libspeex --enable-
 libtheora --enable-libopus --enable-libgme --enable-rpath

 '$PWD' was '/tmp/ffmpeg-a0349ae2'.

 Adding '--enable-debug' made no difference to ValGrind output (specificly,
 backtrace still showed '???').

 ValGrind was previously run with '--leak-check=full --show-leak-
 kinds=indirect,definite'.  Full ValGrind invocation originally used is:

     valgrind --tool=memcheck --leak-check=full --show-leak-
 kinds=indirect,definite --track-origins=yes --track-fds=yes --gen-
 suppressions=all --suppressions=/home/jcf/moc/valgrind/moc.supp
 --suppressions=/home/jcf/moc/valgrind/ffmpeg.supp
 --suppressions=/home/jcf/moc/valgrind/libasound.supp
 --suppressions=/home/jcf/moc/valgrind/libgme.supp
 --suppressions=/home/jcf/moc/valgrind/libguile.supp
 --suppressions=/home/jcf/moc/valgrind/libmagic.supp
 --suppressions=/home/jcf/moc/valgrind/librcc.supp
 --suppressions=/home/jcf/moc/valgrind/libspeex.supp
 --suppressions=/home/jcf/moc/valgrind/libdb.supp
 --suppressions=/home/jcf/moc/valgrind/vfprintf.supp --log-
 file=valgrind.8563 ../moc-test/mocp -D -J -T /home/jcf/moc/testing/themes
 /transparent-background .

 Changing to '--show-leak-kinds=all' made no difference to ValGrind output.
 ValGrind version being used is 3.9.0.

 Trying to build MOC against an FFmpeg built with static (rather than
 shared libraries) failed with:

     /usr/lib64/gcc/x86_64-slackware-linux/4.4.4/../../../../x86_64
 -slackware-linux/bin/ld: /usr/local/stow/ffmpeg-
 a0349ae2/lib64/libavcodec.a(cavsdsp.o): relocation R_X86_64_PC32 against
 symbol `ff_pw_5' can not be used when making a shared object; recompile
 with -fPIC
     /usr/lib64/gcc/x86_64-slackware-linux/4.4.4/../../../../x86_64
 -slackware-linux/bin/ld: final link failed: Bad value

 MOC is available using:

     svn co svn://svn.daper.net/moc/trunk

 Aggregated patch for the patchset being tested is available using:

     wget
 ftp://ftp.daper.net/pub/soft/moc/unstable/moc-r2872+ffmpeg_memleak-1.patch.gz

 Apply to the current SVN trunk HEAD (r2872) using:

     zcat moc-r2872+ffmpeg_memleak-1.patch.gz | patch -p1

 The MOC FFmpeg decoder will be found in:

     decoder_plugins/ffmpeg

 Build as per instructions in README.  After installing, delete all
 installed decoder plugins in 'lib{,64}/moc/decoder_plugins' *except*
 'libffmpeg_decoder.*'.

 Then launch MOC as 'mocp' in the directory containing corrupt files.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5584#comment:2>
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