[FFmpeg-trac] #8192(undetermined:new): Division by zero bug from libavcodec/aacenc.c:903
FFmpeg
trac at avcodec.org
Sun Sep 22 19:20:01 EEST 2019
#8192: Division by zero bug from libavcodec/aacenc.c:903
-------------------------------------+-------------------------------------
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 is a Division by zero bug from libavcodec/aacenc.c:903
{{{
libavcodec/aacenc.c:903:62: runtime error: division by zero
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/aacenc.c:903:62 in
[aac @ 0x619000004180] Qavg: -nan
905 ff_mdct_end(&s->mdct1024);
(gdb) bt
#0 aac_encode_end (avctx=0x619000004180) at libavcodec/aacenc.c:905
#1 0x000000000509f9fa in avcodec_close (avctx=<optimized out>) at
libavcodec/utils.c:1100
#2 0x00000000045d4688 in avcodec_free_context (pavctx=0x6160000045e0) at
libavcodec/options.c:178
#3 0x00000000005df0e8 in ffmpeg_cleanup (ret=0) at fftools/ffmpeg.c:571
#4 0x00000000005afb95 in exit_program (ret=0) at fftools/cmdutils.c:139
#5 0x00000000005db973 in main (argc=<optimized out>, argv=<optimized
out>) at fftools/ffmpeg.c:4911
}}}
How to reproduce:
{{{
% ./ffmpeg_g -y -r 106 -i mjpegb.mov -loglevel 0 -map 0 -c:v:117 mov_text
-disposition:a:151 aptx -vframes 12 -aframes 23 -ab 418k -ar 22050 -strict
1 tmp.mov
ffmpeg version N-94982-gea673a0edb 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/8192>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list