#8264 closed defect (fixed)
heap-buffer-overflow at libavfilter/vf_fieldorder.c
| Reported by: | Suhwan | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avfilter |
| Version: | git-master | Keywords: | asan fieldorder |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
There is a heap-buffer-overflow at libavfilter/vf_fieldorder.c in filter_frame
I compiled ffmpeg with "--toolchain=clang-asan" to check the memory corruption and attached log file.
How to reproduce:
% ffmpeg_g -y -i $PoC -filter_complex fieldorder -loglevel 99 tmp.h261 ffmpeg version N-95336-g4f4334bcbc 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
=================================================================
==15038==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61100000fec0 at pc 0x0000004dcc72 bp 0x7fffffffa8b0 sp 0x7fffffffa060
READ of size 4 at 0x61100000fec0 thread T0
#0 0x4dcc71 in __asan_memcpy (ffmpeg_asan+0x4dcc71)
#1 0xd57a9c in filter_frame ffmpeg/libavfilter/vf_fieldorder.c
#2 0x826e29 in ff_filter_activate_default ffmpeg/libavfilter/avfilter.c:1071:11
#3 0x826e29 in ff_filter_activate ffmpeg/libavfilter/avfilter.c:1430
#4 0x86fcd5 in push_frame ffmpeg/libavfilter/buffersrc.c:187:15
#5 0x86fcd5 in av_buffersrc_add_frame_internal ffmpeg/libavfilter/buffersrc.c:261
#6 0x86e762 in av_buffersrc_add_frame_flags ffmpeg/libavfilter/buffersrc.c:170:16
#7 0x666407 in ifilter_send_frame ffmpeg/fftools/ffmpeg.c:2186:11
#8 0x666407 in send_frame_to_filters ffmpeg/fftools/ffmpeg.c:2260
#9 0x607666 in decode_video ffmpeg/fftools/ffmpeg.c:2459:11
#10 0x607666 in process_input_packet ffmpeg/fftools/ffmpeg.c:2613
#11 0x644c58 in process_input ffmpeg/fftools/ffmpeg.c:4303:23
#12 0x5e7157 in transcode_step ffmpeg/fftools/ffmpeg.c:4628:11
#13 0x5e7157 in transcode ffmpeg/fftools/ffmpeg.c:4682
#14 0x5db65b in main ffmpeg/fftools/ffmpeg.c:4884:9
#15 0x7ffff5c93b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#16 0x41def9 in _start (ffmpeg_asan+0x41def9)
Address 0x61100000fec0 is a wild pointer.
SUMMARY: AddressSanitizer: heap-buffer-overflow (ffmpeg_asan+0x4dcc71) in __asan_memcpy
Please confirm.
Thanks
Attachments (2)
Change History (4)
by , 4 years ago
| Attachment: | log_vf_fieldorder added |
|---|
by , 4 years ago
| Attachment: | PoC_vf_fieldorder.png32 added |
|---|
comment:1 by , 4 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
comment:2 by , 4 years ago
| Component: | undetermined → avfilter |
|---|---|
| Keywords: | fieldorder added |
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