[FFmpeg-trac] #8160(undetermined:new): left shift of negative value bug in libavcodec/ituh263dec.c

[FFmpeg]

#8160: left shift of negative value bug in libavcodec/ituh263dec.c
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  ubsan        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There is left shift of negative value bug in libavcodec/ituh263dec.c
 How to reproduce:
 {{{
 % ./ffmpeg_g -t 2 -stream_loop 13 -loglevel 99 -y -i powder1.mov -target
 dvd -map 0 -c: s:8 zmbv -vframes 61 output/tmp.ilbc

 ffmpeg version N-94943-g1db6e47e85
 built on ubuntu 18.04 with clang-6 and UBSAN option.
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/8160>
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