[FFmpeg-trac] #8246(undetermined:new): heap-buffer-overflow at libavfilter/vf_vmafmotion.c:179
FFmpeg
trac at avcodec.org
Fri Oct 11 06:53:46 EEST 2019
#8246: heap-buffer-overflow at libavfilter/vf_vmafmotion.c:179
-------------------------------------+-------------------------------------
Reporter: Suhwan | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: asan | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
There is a heap-buffer-overflow at libavfilter/vf_vmafmotion.c:179 in
convolution_y_8bit
I compiled ffmpeg with "--toolchain=clang-asan" to check the heap buffer
overflow and attached log file.
How to reproduce:
{{{
% ffmpeg_g -t 1 -y -r 98 -i $PoC -filter_complex vmafmotion -target vcd
-loglevel 99 -c:a:23 pcm_s32be -disposition:v:174 g722 -disposition:v:232
cljr -aframes 7 -r 26 -ar 48000 -ac 16 -strict 2 tmp.anm
ffmpeg version N-95314-g1331e00179 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-asan
}}}
Here's ASAN log
{{{
==4009==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60a000000ca0 at pc 0x0000013c6187 bp 0x7fffffffa590 sp 0x7fffffffa588
WRITE of size 2 at 0x60a000000ca0 thread T0
#0 0x13c6186 in convolution_y_8bit
ffmpeg/libavfilter/vf_vmafmotion.c:179:1
#1 0x13bcaf8 in ff_vmafmotion_process
ffmpeg/libavfilter/vf_vmafmotion.c:192:5
#2 0x13c68f8 in do_vmafmotion
ffmpeg/libavfilter/vf_vmafmotion.c:225:13
#3 0x13c68f8 in filter_frame ffmpeg/libavfilter/vf_vmafmotion.c:300
#4 0x827289 in ff_filter_activate_default
ffmpeg/libavfilter/avfilter.c:1071:11
#5 0x827289 in ff_filter_activate ffmpeg/libavfilter/avfilter.c:1430
#6 0x870182 in push_frame ffmpeg/libavfilter/buffersrc.c:187:15
#7 0x870182 in av_buffersrc_add_frame_internal
ffmpeg/libavfilter/buffersrc.c:261
#8 0x86ebc2 in av_buffersrc_add_frame_flags
ffmpeg/libavfilter/buffersrc.c:170:16
#9 0x666867 in ifilter_send_frame ffmpeg/fftools/ffmpeg.c:2196:11
#10 0x666867 in send_frame_to_filters ffmpeg/fftools/ffmpeg.c:2270
#11 0x6075f7 in decode_video ffmpeg/fftools/ffmpeg.c:2469:11
#12 0x6075f7 in process_input_packet ffmpeg/fftools/ffmpeg.c:2623
#13 0x64ab67 in process_input ffmpeg/fftools/ffmpeg.c:4518:5
#14 0x5e7157 in transcode_step ffmpeg/fftools/ffmpeg.c:4638:11
#15 0x5e7157 in transcode ffmpeg/fftools/ffmpeg.c:4692
#16 0x5db65b in main ffmpeg/fftools/ffmpeg.c:4894:9
#17 0x7ffff5c93b96 in __libc_start_main /build/glibc-
OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#18 0x41def9 in _start (ffmpeg/ffmpeg_g+0x41def9)
0x60a000000ca0 is located 32 bytes to the left of 64-byte region
[0x60a000000cc0,0x60a000000d00)
allocated by thread T0 here:
#0 0x4de9e8 in posix_memalign (ffmpeg/ffmpeg_g+0x4de9e8)
#1 0x8564fb1 in av_malloc ffmpeg/libavutil/mem.c:87:9
#2 0x13be241 in ff_vmafmotion_init
ffmpeg/libavfilter/vf_vmafmotion.c:248:29
SUMMARY: AddressSanitizer: heap-buffer-overflow
ffmpeg/libavfilter/vf_vmafmotion.c:179:1 in convolution_y_8bit
}}}
Please confirm.
Thanks
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8246>
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