[FFmpeg-trac] #689(undetermined:new): iff ilbm: possible invalid reads

[FFmpeg]

#689: iff ilbm: possible invalid reads
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I get invalid reads while testing ffplay with attached iff ilbm (ham8)
 file under amigaos, so it would be good to check if the same happen under
 valgrid - "ffplay a4000t_ham8.iff"

 the problem seems to disappear when I comment out two lines in
 decode_ham_plane32() function

 {{{
 C:\>ffmpeg -i A4000T_HAM8.IFF
 ffmpeg version N-35057-g2c44aed, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Nov 21 2011 02:36:31 with gcc 4.6.2
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-ru
 ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-
 libope
 ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-
 libgsm --en
 able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-
 libschroedinger -
 -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-
 amrwben
 c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs
 --enable-
 libxvid --enable-zlib
   libavutil    51. 26. 0 / 51. 26. 0
   libavcodec   53. 36. 0 / 53. 36. 0
   libavformat  53. 21. 0 / 53. 21. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 49. 0 /  2. 49. 0
   libswscale    2.  1. 0 /  2.  1. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [IFF @ 020A2320] Estimating duration from bitrate, this may be inaccurate
 Input #0, IFF, from 'A4000T_HAM8.IFF':
   Metadata:
     comment         : $VER: Written by ASDG's Art Department Professional
 IFF3.0
 .1 (03.19.93)
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: iff_byterun1 (ILBM / 0x4D424C49), rgba, 628x512,
 SAR 1:1
  DAR 157:128, 90k tbr, 90k tbn, 90k tbc
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/689>
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