[FFmpeg-trac] #8161(undetermined:new): left shift of negative value bugs in libavcodec/wavpackenc.c

[FFmpeg]

#8161: left shift of negative value bugs in libavcodec/wavpackenc.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 two left shift of negative value bugs in libavcodec/wavpackenc.c
 {{{
 libavcodec/wavpackenc.c:534:32: runtime error: left shift of negative
 value -8
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/wavpackenc.c:534:32 in
 libavcodec/wavpackenc.c:2560:47: runtime error: left shift of negative
 value -1
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/wavpackenc.c:2560:47 in
 }}}
 How to reproduce:
 {{{
 % ./ffmpeg_g -t 0 -stream_loop 1 -y -r 49 -i testvector07.ogg -loglevel 99
 -map 0 -ar 22050 -ac 3 output/tmp.wv

 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/8161>
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