[FFmpeg-trac] #8158(undetermined:new): left shift of negative value bug in libavcodec/wmavoice.c

[FFmpeg]

#8158: left shift of negative value bug in libavcodec/wmavoice.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/wmavoice.c:1523
 {{{
 libavcodec/wmavoice.c:1523:50: runtime error: left shift of negative value
 -2
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/wmavoice.c:1523:50 in
 }}}
 How to reproduce:
 {{{
 % ./ffmpeg_g -y -r 86 -i wmv3-wmaspeeech.wmv -loglevel 99 -map 0 -vframes
 43 -aframes 60 -r 101 -ac 30 -strict 1 output/tmp.wtv

 ffmpeg version N-94887-ge55018ee11 (git master)
 built on ubuntu 18.04 with clang-6 and UBSAN option.
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/8158>
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