[FFmpeg-trac] #8083(avformat:new): Matroska demuxer fails to parse big attachements

FFmpeg trac at avcodec.org
Fri Aug 16 19:50:29 EEST 2019

#8083: Matroska demuxer fails to parse big attachements
             Reporter:  Zenitram    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
Changes (by mkver):

 * analyzed:  0 => 1
 * reproduced:  0 => 1


 This is because of the restrictions in max_lengths (line 1174 in
 libavformat/matroskdec.c). These exist so that (potentially intentionally)
 damaged data does not cause arbitrarily big allocations.
 Is there any limit on the size of the attachments that you intend to store
 in Matroska?

Ticket URL: <https://trac.ffmpeg.org/ticket/8083#comment:1>
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