[FFmpeg-trac] #5169(avcodec:new): Memory leak in ebml_parse_elem()
FFmpeg
trac at avcodec.org
Mon Jan 18 18:43:49 CET 2016
#5169: Memory leak in ebml_parse_elem()
---------------------------------+--------------------------------------
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:
Memory leak triggered while processing a webm file.
How to reproduce:
{{{
% ffmpeg -f webm -i test_case.webm -f null -
ffmpeg version N-77870-gb58cfa6 Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --cc=gcc --cxx=g++ --disable-libxcb --disable-xlib
--disable-logging --disable-ffprobe --disable-ffplay --disable-sdl
--disable-ffserver --disable-doc --disable-pthreads --disable-stripping
--disable-runtime-cpudetect
libavutil 55. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 24.100 / 6. 24.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
==21917==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 2688 byte(s) in 1 object(s) allocated from:
#0 0x5029b0 in realloc /home/user/Desktop/llvm/projects/compiler-
rt/lib/asan/asan_malloc_linux.cc:61
#1 0x8e90ca in ebml_parse_elem
/home/user/code/ffmpeg/libavformat/matroskadec.c:1075:19
#2 0x8e83a1 in ebml_parse_id
/home/user/code/ffmpeg/libavformat/matroskadec.c:954:12
#3 0x8e83a1 in ebml_parse
/home/user/code/ffmpeg/libavformat/matroskadec.c:970
#4 0x8e9e27 in ebml_parse_nest
/home/user/code/ffmpeg/libavformat/matroskadec.c:999:15
#5 0x8e9e27 in ebml_parse_elem
/home/user/code/ffmpeg/libavformat/matroskadec.c:1127
#6 0x8e83a1 in ebml_parse_id
/home/user/code/ffmpeg/libavformat/matroskadec.c:954:12
#7 0x8e83a1 in ebml_parse
/home/user/code/ffmpeg/libavformat/matroskadec.c:970
#8 0x8dcf08 in matroska_read_header
/home/user/code/ffmpeg/libavformat/matroskadec.c:2274:15
#9 0xa86b59 in avformat_open_input
/home/user/code/ffmpeg/libavformat/utils.c:482:20
#10 0x53a764 in open_input_file
/home/user/code/ffmpeg/ffmpeg_opt.c:950:11
#11 0x538d01 in open_files /home/user/code/ffmpeg/ffmpeg_opt.c:2999:15
#12 0x5385fc in ffmpeg_parse_options
/home/user/code/ffmpeg/ffmpeg_opt.c:3036:11
#13 0x55dd81 in main /home/user/code/ffmpeg/ffmpeg.c:4299:11
#14 0x7fea45f1aec4 in __libc_start_main /build/buildd/eglibc-2.19/csu
/libc-start.c:287
Indirect leak of 32 byte(s) in 8 object(s) allocated from:
#0 0x5029b0 in realloc /home/user/Desktop/llvm/projects/compiler-
rt/lib/asan/asan_malloc_linux.cc:61
#1 0x26e4e45 in av_realloc
/home/user/code/ffmpeg/libavutil/mem.c:168:12
#2 0x26e4e45 in av_strdup /home/user/code/ffmpeg/libavutil/mem.c:272
#3 0x8e83a1 in ebml_parse_id
/home/user/code/ffmpeg/libavformat/matroskadec.c:954:12
#4 0x8e83a1 in ebml_parse
/home/user/code/ffmpeg/libavformat/matroskadec.c:970
#5 0x8e9e27 in ebml_parse_nest
/home/user/code/ffmpeg/libavformat/matroskadec.c:999:15
#6 0x8e9e27 in ebml_parse_elem
/home/user/code/ffmpeg/libavformat/matroskadec.c:1127
#7 0x8e83a1 in ebml_parse_id
/home/user/code/ffmpeg/libavformat/matroskadec.c:954:12
#8 0x8e83a1 in ebml_parse
/home/user/code/ffmpeg/libavformat/matroskadec.c:970
#9 0x8dcf08 in matroska_read_header
/home/user/code/ffmpeg/libavformat/matroskadec.c:2274:15
#10 0xa86b59 in avformat_open_input
/home/user/code/ffmpeg/libavformat/utils.c:482:20
#11 0x53a764 in open_input_file
/home/user/code/ffmpeg/ffmpeg_opt.c:950:11
#12 0x538d01 in open_files /home/user/code/ffmpeg/ffmpeg_opt.c:2999:15
#13 0x5385fc in ffmpeg_parse_options
/home/user/code/ffmpeg/ffmpeg_opt.c:3036:11
#14 0x55dd81 in main /home/user/code/ffmpeg/ffmpeg.c:4299:11
#15 0x7fea45f1aec4 in __libc_start_main /build/buildd/eglibc-2.19/csu
/libc-start.c:287
SUMMARY: AddressSanitizer: 2720 byte(s) leaked in 9 allocation(s).
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5169>
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