[FFmpeg-trac] #2934(undetermined:new): c93: invalid read

[FFmpeg]

#2934: c93: invalid read
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  c93          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ami_stuff):

 {{{
 (gdb) r -vcodec c93 -i cyuv.avi -f null -
 Starting program: D:\MinGW\msys\1.0\ffmpeg-HEAD-a67dcd7\ffmpeg_g.exe
 -vcodec c93
  -i cyuv.avi -f null -
 [New Thread 1968.0xf04]
 ffmpeg version 2.0-a67dcd7 Copyright (c) 2000-2013 the FFmpeg developers
   built on Sep  5 2013 17:46:37 with gcc 4.6.2 (GCC)
   configuration: --disable-w32threads --disable-yasm --disable-ffprobe
 --enable-
 gpl
   libavutil      52. 43.100 / 52. 43.100
   libavcodec     55. 31.101 / 55. 31.101
   libavformat    55. 16.101 / 55. 16.101
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 83.102 /  3. 83.102
   libswscale      2.  5.100 /  2.  5.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, avi, from 'cyuv.avi':
   Duration: 00:00:05.00, start: 0.000000, bitrate: 4579 kb/s
     Stream #0:0: Video: c93 (cyuv / 0x76757963), pal8, 176x144, 30 tbr, 30
 tbn,
 30 tbc
 [New Thread 1968.0x8ac]
 [New Thread 1968.0x6b4]
 [New Thread 1968.0xba0]
 [New Thread 1968.0x6dc]
 [New Thread 1968.0xcc4]
 [New Thread 1968.0x2d4]
 [New Thread 1968.0xe30]
 [New Thread 1968.0xed0]
 [New Thread 1968.0x790]
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf55.16.101
     Stream #0:0: Video: rawvideo, pal8, 176x144, q=2-31, 200 kb/s, 90k
 tbn, 30 t
 bc
 Stream mapping:
   Stream #0:0 -> #0:0 (c93 -> rawvideo)
 Press [q] to stop, [?] for help
 [c93 @ 04df6e60] unexpected type 1 at 24x0
 Error while decoding stream #0:0: Invalid data found when processing input
 [c93 @ 04df6e60] invalid offset 61163 during C93 decoding
 Error while decoding stream #0:0: Invalid data found when processing input

 Program received signal SIGSEGV, Segmentation fault.
 0x006381c2 in copy_block (stride=208, height=4, offset=<optimized out>,
     from=0x4e01fe0 "ţ˝ţ˘", to=0x4df9370 "", avctx=0x4df6e60)
     at libavcodec/c93.c:96
 96              memcpy(&to[i*stride], &from[(from_y+i)*stride+from_x],
 width);
 (gdb) bt
 #0  0x006381c2 in copy_block (stride=208, height=4, offset=<optimized
 out>,
     from=0x4e01fe0 "ţ˝ţ˘", to=0x4df9370 "", avctx=0x4df6e60)
     at libavcodec/c93.c:96
 #1  decode_frame (avctx=0x4df6e60, data=0x4de1d20, got_frame=0x22fa9c,
     avpkt=0x22f768) at libavcodec/c93.c:179
 #2  0x0059fcb2 in avcodec_decode_video2 (avctx=0x4df6e60,
 picture=0x4de1d20,
     got_picture_ptr=0x22fa9c, avpkt=0x22f898) at libavcodec/utils.c:1983
 #3  0x00413624 in decode_video (got_output=<optimized out>,
     pkt=<optimized out>, ist=<optimized out>) at ffmpeg.c:1668
 #4  output_packet (ist=0x4df8e40, pkt=0x22fbe0) at ffmpeg.c:1866
 #5  0x004162a7 in process_input (file_index=81760096) at ffmpeg.c:3085
 #6  0x00b07c28 in transcode_step () at ffmpeg.c:3181
 #7  transcode () at ffmpeg.c:3233
 #8  main (argc=8, argv=<optimized out>) at ffmpeg.c:3411
 (gdb)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2934#comment:4>
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