[FFmpeg-trac] #8159(undetermined:new): left shift of negative value bugs in libavcodec/truespeech.c
FFmpeg
trac at avcodec.org
Mon Sep 16 17:50:30 EEST 2019
#8159: left shift of negative value bugs in libavcodec/truespeech.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're 5 left shift of negative value bugs in libavcodec/truespeech.c
{{{
libavcodec/truespeech.c:136:53: runtime error: left shift of negative
value -133
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/truespeech.c:136:53 in
libavcodec/truespeech.c:259:30: runtime error: left shift of negative
value -2
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/truespeech.c:259:30 in
libavcodec/truespeech.c:277:27: runtime error: left shift of negative
value -2
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/truespeech.c:277:27 in
libavcodec/truespeech.c:285:26: runtime error: left shift of negative
value -3
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
libavcodec/truespeech.c:285:26 in
libavcodec/ac3enc.c:1068:37: runtime error: left shift of negative value
-32
}}}
How to reproduce:
{{{
% ./ffmpeg_g -stream_loop 25 -y -i a6.wav -map 0 -vframes 8 -r 112 -ab 16k
-ar 22050 -b:v 473k output/tmp.avi
ffmpeg version N-94943-g1db6e47e85
built on ubuntu 18.04 with clang-6 and UBSAN option.
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8159>
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