[FFmpeg-trac] #8142(undetermined:new): signed integer overflow in fftools/ffmpeg.c

[FFmpeg]

#8142: signed integer overflow in fftools/ffmpeg.c
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  ubsan        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There's a signed integer overflow bug in fftools/ffmpeg.c:4238:34:
 {{{
 fftools/ffmpeg.c:4238:34: runtime error: signed integer overflow:
 -9223372036854775808 - 9223372036854775807 cannot be represented in type
 'long'
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 fftools/ffmpeg.c:4238:34 in
 }}}
 How to reproduce:
 {{{
 % ./ffmpeg_g -stream_loop 21 -y -i Silent_Mobius-OpenDivX-200-sound.avi
 -target vcd -map 0 -c copy -aframes 100 -ar 48000 -ac 7 -b:v 599k
 output/tmp.nuv
 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/8142>
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