[FFmpeg-trac] #5135(avformat:new): signed integer overflow in update_stream_timings

[FFmpeg]

#5135: signed integer overflow in update_stream_timings
----------------------------------+--------------------------------------
             Reporter:  tsmith    |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 Summary of the bug:
 UBSan: libavformat/utils.c:2357:27: runtime error: signed integer
 overflow: -615294856720577842 + -9223372036854775808 cannot be represented
 in type 'long'

 How to reproduce:
 {{{
 % ffmpeg -f ivf -i <test_case> -f null -
 ffmpeg version N-77718-g72673ad Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Ubuntu clang version 3.7.1-svn253742-1~exp1
 (branches/release_37) (based on LLVM 3.7.1)
   configuration: --cc=clang --cxx=clang++ --disable-libxcb --disable-xlib
 --disable-logging --disable-ffprobe --disable-ffplay --disable-sdl
 --disable-ffserver --disable-doc --disable-pthreads --disable-network
 --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-
 vdpau --disable-stripping --disable-runtime-cpudetect --disable-
 securetransport --disable-iconv
   libavutil      55. 12.100 / 55. 12.100
   libavcodec     57. 22.100 / 57. 22.100
   libavformat    57. 21.101 / 57. 21.101
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 23.100 /  6. 23.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
 [vp9 @ 0x619000005a80] Warning: not compiled with thread support, using
 thread emulation
 Truncating packet of size 438632507 to 1549
 libavformat/utils.c:2357:27: runtime error: signed integer overflow:
 -615294856720577842 + -9223372036854775808 cannot be represented in type
 'long'
     #0 0xc385c3 in update_stream_timings
 /home/user/code/ffmpeg/libavformat/utils.c:2357:27
     #1 0xc37755 in fill_all_stream_timings
 /home/user/code/ffmpeg/libavformat/utils.c:2408:5
     #2 0xc2189a in estimate_timings
 /home/user/code/ffmpeg/libavformat/utils.c:2624:9
     #3 0xc2189a in avformat_find_stream_info
 /home/user/code/ffmpeg/libavformat/utils.c:3537
     #4 0x53c6cb in open_input_file
 /home/user/code/ffmpeg/ffmpeg_opt.c:970:11
     #5 0x53a94f in open_files /home/user/code/ffmpeg/ffmpeg_opt.c:2999:15
     #6 0x53a11c in ffmpeg_parse_options
 /home/user/code/ffmpeg/ffmpeg_opt.c:3036:11
     #7 0x56f5ab in main /home/user/code/ffmpeg/ffmpeg.c:4292:11
     #8 0x7efe2f3f1ec4 in __libc_start_main /build/buildd/eglibc-2.19/csu
 /libc-start.c:287
     #9 0x466445 in _start (/home/user/Desktop/ffmpeg/ffmpeg_full+0x466445)
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5135>
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