[FFmpeg-trac] #8159(undetermined:new): left shift of negative value bugs in libavcodec/truespeech.c

[FFmpeg]

#8159: left shift of negative value bugs in libavcodec/truespeech.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're 5 left shift of negative value bugs in libavcodec/truespeech.c
 {{{
 libavcodec/truespeech.c:136:53: runtime error: left shift of negative
 value -133
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/truespeech.c:136:53 in
 libavcodec/truespeech.c:259:30: runtime error: left shift of negative
 value -2
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/truespeech.c:259:30 in
 libavcodec/truespeech.c:277:27: runtime error: left shift of negative
 value -2
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/truespeech.c:277:27 in
 libavcodec/truespeech.c:285:26: runtime error: left shift of negative
 value -3
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/truespeech.c:285:26 in
 libavcodec/ac3enc.c:1068:37: runtime error: left shift of negative value
 -32

 }}}
 How to reproduce:
 {{{
 % ./ffmpeg_g -stream_loop 25 -y -i a6.wav -map 0 -vframes 8 -r 112 -ab 16k
 -ar 22050 -b:v 473k output/tmp.avi

 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/8159>
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