[FFmpeg-trac] #7983(undetermined:new): undefined-behavior at libavcodec/j2kenc.c:524:31

[FFmpeg]

#7983: undefined-behavior at libavcodec/j2kenc.c:524:31
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  j2kenc       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There're undefined-behaviours at libavcodec/j2kenc.c:524, 530, 528 and one
 from libavcodec/jpeg2000dwt.c:258:14(left shift of negative value -82)

 How to reproduce:
 {{{
 % ffmpeg_g  -y -r 56 -i tmp.avi -map 0 -c:v jpeg2000 -c:a v308
 -disposition:a:124 g722 -disposition:s cinepak -vframes 59 -aframes 21 -r
 2 -ar 48000 -ac 19 -strict 3 tmp_.adx

 ffmpeg version N-94142-g3b2082c663 Copyright (c) 2000-2019 the FFmpeg
 developers

 built with clang version 9.0.0 (https://github.com/llvm/llvm-project.git
 442a120567a4bc6c59bc754f9edabfb770086f36)
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7983>
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