[FFmpeg-trac] #5129(avcodec:new): left shift of negative value in decode_frame_header()
FFmpeg
trac at avcodec.org
Thu Jan 7 02:23:38 CET 2016
#5129: left shift of negative value in decode_frame_header()
---------------------------------+--------------------------------------
Reporter: tsmith | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
---------------------------------+--------------------------------------
Summary of the bug:
UBSan: libavcodec/vp9.c:732:64: runtime error: left shift of negative
value
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
libavcodec/vp9.c:732:64: runtime error: left shift of negative value -53
#0 0x1c7f89c in decode_frame_header
/home/user/code/ffmpeg/libavcodec/vp9.c:732:64
#1 0x1c72f6c in vp9_decode_frame
/home/user/code/ffmpeg/libavcodec/vp9.c:3970:16
#2 0x1a3fc96 in avcodec_decode_video2
/home/user/code/ffmpeg/libavcodec/utils.c:2107:19
#3 0xc27c95 in try_decode_frame
/home/user/code/ffmpeg/libavformat/utils.c:2760:19
#4 0xc1f630 in avformat_find_stream_info
/home/user/code/ffmpeg/libavformat/utils.c:3412:9
#5 0x53c6cb in open_input_file
/home/user/code/ffmpeg/ffmpeg_opt.c:970:11
#6 0x53a94f in open_files /home/user/code/ffmpeg/ffmpeg_opt.c:2999:15
#7 0x53a11c in ffmpeg_parse_options
/home/user/code/ffmpeg/ffmpeg_opt.c:3036:11
#8 0x56f5ab in main /home/user/code/ffmpeg/ffmpeg.c:4292:11
#9 0x7f1fc1270ec4 in __libc_start_main /build/buildd/eglibc-2.19/csu
/libc-start.c:287
#10 0x466445 in _start
(/home/user/Desktop/ffmpeg/ffmpeg_full+0x466445)
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5129>
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