[FFmpeg-trac] #8218(undetermined:new): Division by zero at libavcodec/aaccoder.c

[FFmpeg]

#8218: Division by zero at libavcodec/aaccoder.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 are three Division by zero at libavcodec/aaccoder.c.
 Division by zero at aaccoder.c:852 is new.
 [https://trac.ffmpeg.org/ticket/8177 ref:ticket8177]
 {{{
 libavcodec/aaccoder.c:852:60: runtime error: division by zero
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/aaccoder.c:852:60 in

 libavcodec/aaccoder.c:858:60: runtime error: division by zero
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/aaccoder.c:858:60 in
 libavcodec/aaccoder.c:864:62: runtime error: division by zero
 SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
 libavcodec/aaccoder.c:864:62 in
 }}}
 How to reproduce:
 {{{
 % ffmpeg_g -t 3 -y -r 37 -i $PoC -loglevel 0 -map 0 -c:a:87 h264_v4l2m2m
 -disposition:v:103 h264_v4l2m2m -vframes 8 -ab 906k -ar 48000 -strict 1
 tmp.m4a

 ffmpeg version N-95199-g9847380f5f Copyright (c) 2000-2019 the FFmpeg
 developers
   built with clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
   configuration: --cc=clang --cxx=clang++ --ld=clang --enable-debug
 --toolchain=clang-usan
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8218>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker