[FFmpeg-trac] #8284(undetermined:new): memory leaks in fifo_alloc_common()

[FFmpeg]

#8284: memory leaks  in fifo_alloc_common()
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There are memory leaks in fifo_alloc_common()
 How to reproduce:
 {{{
 %ffmpeg_g -stream_loop 23 -y -i $PoC1 -i $PoC2 -target svcd -loglevel 0
 -psnr -c copy -c:s:9 ac3 -disposition:a:114 adpcm_adx tmp.mvi

 ffmpeg version N-95389-gdd01947397 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
 }}}

 Here's Valgrind log

 {{{
 ==48887== HEAP SUMMARY:
 ==48887==     in use at exit: 88 bytes in 3 blocks
 ==48887==   total heap usage: 667 allocs, 664 frees, 680,197 bytes
 allocated
 ==48887==
 ==48887== 56 (40 direct, 16 indirect) bytes in 1 blocks are definitely
 lost in loss record 3 of 3
 ==48887==    at 0x9D3CE76: memalign (in /usr/lib/valgrind
 /vgpreload_memcheck-amd64-linux.so)
 ==48887==    by 0x9D3CF91: posix_memalign (in /usr/lib/valgrind
 /vgpreload_memcheck-amd64-linux.so)
 ==48887==    by 0x590EC79: av_malloc (mem.c:87)
 ==48887==    by 0x590EC79: av_mallocz (mem.c:238)
 ==48887==    by 0x58DA3AC: fifo_alloc_common (fifo.c:32)
 ==48887==    by 0x175B433: mpeg_mux_init (mpegenc.c:461)
 ==48887==    by 0x17BEA4D: avformat_write_header (mux.c:521)
 ==48887==    by 0x4AB6CF: check_init_output_file (ffmpeg.c:2973)
 ==48887==    by 0x4A830E: init_output_stream (ffmpeg.c:3631)
 ==48887==    by 0x492E66: transcode_init (ffmpeg.c:3700)
 ==48887==    by 0x48A1A5: transcode (ffmpeg.c:4653)
 ==48887==    by 0x487D53: main (ffmpeg.c:4884)
 ==48887==
 ==48887== LEAK SUMMARY:
 ==48887==    definitely lost: 40 bytes in 1 blocks
 ==48887==    indirectly lost: 16 bytes in 1 blocks
 ==48887==      possibly lost: 0 bytes in 0 blocks
 ==48887==    still reachable: 32 bytes in 1 blocks
 ==48887==         suppressed: 0 bytes in 0 blocks
 ==48887== Reachable blocks (those to which a pointer was found) are not
 shown.
 ==48887== To see them, rerun with: --leak-check=full --show-leak-kinds=all
 ==48887==
 ==48887== For counts of detected and suppressed errors, rerun with: -v
 ==48887== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

 }}}

 ASAN log
 {{{
 =================================================================
 ==34325==ERROR: LeakSanitizer: detected memory leaks

 Direct leak of 40 byte(s) in 1 object(s) allocated from:
     #0 0x4de9e8 in posix_memalign (ffmpeg_asan+0x4de9e8)
     #1 0x8594168 in av_malloc ffmpeg/libavutil/mem.c:87:9
     #2 0x8594168 in av_mallocz ffmpeg/libavutil/mem.c:238
     #3 0x852e42d in fifo_alloc_common ffmpeg/libavutil/fifo.c:32:9

 Indirect leak of 16 byte(s) in 1 object(s) allocated from:
     #0 0x4de9e8 in posix_memalign (ffmpeg_asan+0x4de9e8)
     #1 0x8593011 in av_malloc ffmpeg/libavutil/mem.c:87:9
     #2 0x852e3f6 in av_fifo_alloc ffmpeg/libavutil/fifo.c:45:20

 SUMMARY: AddressSanitizer: 56 byte(s) leaked in 2 allocation(s).
 }}}
 Please confirm.
 Thanks

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8284>
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