Memleak when decoding broken vorbis sample

[Carl Eugen Hoyos]

(sample from issue 2328)

$ valgrind --leak-check=full ffmpeg_g -i zzuf1.mkv -f null -
==22239== Memcheck, a memory error detector.
==22239== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==22239== Using LibVEX rev 1732, a library for dynamic binary translation.
==22239== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==22239== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==22239== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==22239== For more details, rerun with: -v
==22239==
ffmpeg version N-42594-g56ae592 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jul 18 2012 13:22:12 with gcc 4.3.2
  configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --disable-optimizations
  libavutil      51. 65.100 / 51. 65.100
  libavcodec     54. 41.100 / 54. 41.100
  libavformat    54. 17.100 / 54. 17.100
  libavdevice    54.  1.100 / 54.  1.100
  libavfilter     3.  2.100 /  3.  2.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
[matroska,webm @ 0x4418640] Unknown entry 0x45A1
[matroska,webm @ 0x4418640] Skipping invalid tag with no TagName.
[vorbis @ 0x44310e0] Codebook lookup type not supported.
[vorbis @ 0x44310e0]  Vorbis setup header packet corrupt (codebooks).
[vorbis @ 0x44310e0] Setup header corrupt.
[vorbis @ 0x44310e0] Codebook lookup type not supported.
[vorbis @ 0x44310e0]  Vorbis setup header packet corrupt (codebooks).
[vorbis @ 0x44310e0] Setup header corrupt.
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, matroska,webm, from 'zzuf1.mkv':
  Metadata:
    ENCODER         : Lavf52.84.0
  Duration: 00:09:35.97, start: 0.000000, bitrate: 1 kb/s
    Stream #0:0: Audio: vorbis, 44100 Hz, stereo, s16 (default)
[vorbis @ 0x44310e0] Codebook lookup type not supported.
[vorbis @ 0x44310e0]  Vorbis setup header packet corrupt (codebooks).
[vorbis @ 0x44310e0] Setup header corrupt.
Output #0, null, to 'pipe:':
  Metadata:
    ENCODER         : Lavf52.84.0
    Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default)
Stream mapping:
  Stream #0:0 -> #0:0 (vorbis -> pcm_s16le)
Error while opening decoder for input stream #0:0
==22239==
==22239== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 3 from 1)
==22239== malloc/free: in use at exit: 408 bytes in 2 blocks.
==22239== malloc/free: 424 allocs, 422 frees, 1,834,812 bytes allocated.
==22239== For counts of detected errors, rerun with: -v
==22239== searching for pointers to 2 not-freed blocks.
==22239== checked 6,279,796 bytes.
==22239==
==22239== 408 bytes in 2 blocks are definitely lost in loss record 1 of 1
==22239==    at 0x4021A50: memalign (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==22239==    by 0x4021AAA: posix_memalign (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==22239==    by 0x8854ADB: av_malloc (mem.c:95)
==22239==    by 0x85A9A96: avcodec_alloc_frame (utils.c:710)
==22239==    by 0x84F07E3: pcm_encode_init (pcm.c:52)
==22239==    by 0x85AA8C6: avcodec_open2 (utils.c:977)
==22239==    by 0x8055E3A: transcode_init (ffmpeg.c:3178)
==22239==    by 0x80572ED: transcode (ffmpeg.c:3594)
==22239==    by 0x80609E3: main (ffmpeg.c:6051)
==22239==
==22239== LEAK SUMMARY:
==22239==    definitely lost: 408 bytes in 2 blocks.
==22239==      possibly lost: 0 bytes in 0 blocks.
==22239==    still reachable: 0 bytes in 0 blocks.
==22239==         suppressed: 0 bytes in 0 blocks.

[Carl Eugen Hoyos]

Should be fixed.