[FFmpeg-trac] #8177(undetermined:new): four division by zero bugs in aaccoder.c and lpc.h
FFmpeg
trac at avcodec.org
Wed Sep 18 22:21:50 EEST 2019
#8177: four division by zero bugs in aaccoder.c and lpc.h
-------------------------------------+-------------------------------------
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're four division by zero bugs in aaccoder.c and lpc.h
{{{
libavcodec/aaccoder.c:846:60: runtime error: division by zero
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/aaccoder.c:846:60 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
libavcodec/lpc.h:155:27: runtime error: division by zero
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/lpc.h:155:27 in
}}}
How to reproduce:
{{{
% ./ffmpeg_g -stream_loop 1 -y -r 83 -i surge-2-16-B-ima4.mov -loglevel 0
-map 0 -vframes 4 -aframes 74 -strict 3 tmp.m4a
ffmpeg version N-94961-g1d86e4b3eb 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/8177>
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