[FFmpeg-trac] #8169(undetermined:new): Data race from ff_mpeg_update_thread_context in libavcodec/mpegvideo.c

FFmpeg trac at avcodec.org
Mon Sep 16 19:44:01 EEST 2019


#8169: Data race from ff_mpeg_update_thread_context in libavcodec/mpegvideo.c
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  tsan         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There're data race bugs from ff_mpeg_update_thread_context in
 libavcodec/mpegvideo.c:510:9 and from mpeg4_update_thread_context in
 libavcodec/mpeg4videodec.c:3463:5.

 How to reproduce:
 {{{
 % ./ffmpeg_g -y -i avi+mpeg4+mp2++PTS_DTS_Order_Prob.avi -target dv50
 -loglevel 0 -map 0 -aframes 85 -r 101 -ac 20 -b:v 90k -strict 3
 output/tmp.srt

 ffmpeg version N-94943-g1db6e47e85 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-tsan
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8169>
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