[FFmpeg-trac] #312(avcodec:open): Invalid reads in ff_h264_pred_direct_motion() when decoding corrupt H264 sample

[FFmpeg]

#312: Invalid reads in ff_h264_pred_direct_motion() when decoding corrupt H264
sample
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             Reporter:  cehoyos     |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  h264        |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Changes (by cehoyos):

 * status:  new => open


Comment:

 Still reproducible for another sample with 32bit ffmpeg:
 {{{
 $ valgrind ./ffmpeg_g -i test.h264 -f null -
 ffmpeg version N-33240-ga5dfeb6, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Oct  3 2011 10:53:02 with gcc 4.5.3
   configuration: --cc='/usr/local/gcc-4.5.3/bin/gcc -m32'
 ...
 ==14866== Invalid read of size 2
 ==14866==    at 0x8270360: ff_h264_pred_direct_motion (h264_direct.c:377)
 ==14866==  Address 0xe40f900 is not stack'd, malloc'd or (recently) free'd
 ==14866==
 ==14866== Invalid read of size 2
 ==14866==    at 0x8270370: ff_h264_pred_direct_motion (h264_direct.c:377)
 ==14866==  Address 0xe40f902 is not stack'd, malloc'd or (recently) free'd
 ==14866==
 }}}

-- 
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/312#comment:2>
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