[FFmpeg-trac] #2730(undetermined:new): swscale crash with low mem

[FFmpeg]

#2730: swscale crash with low mem
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  crash        |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ami_stuff):

 got a bt:

 {{{
 knoppix at Microknoppix:/media/sdb1$ ./ffmpeg_g -i o/divx.avi -y -vcodec
 msvideo1 out.avi
 ffmpeg version 1.1.git Copyright (c) 2000-2013 the FFmpeg developers
   built on Jun 30 2013 17:18:20 with gcc 4.7 (Debian 4.7.2-4)
   configuration: --disable-asm --disable-ffprobe --disable-ffserver
 --enable-gpl
   libavutil      52. 37.101 / 52. 37.101
   libavcodec     55. 17.100 / 55. 17.100
   libavformat    55. 10.100 / 55. 10.100
   libavdevice    55.  2.100 / 55.  2.100
   libavfilter     3. 77.101 /  3. 77.101
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 [mpeg4 @ 0x905d4e0] Invalid and inefficient vfw-avi packed B frames
 detected
 Input #0, avi, from 'o/divx.avi':
   Duration: 00:00:12.64, start: 0.000000, bitrate: 963 kb/s
     Stream #0:0: Video: mpeg4 (DX50 / 0x30355844), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], 23.98 fps, 23.98 tbr, 23.97 tbn, 30k tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p,
 128 kb/s
 [swscaler @ 0x9050e60] No accelerated colorspace conversion found from
 yuv420p to rgb555le.
 [swscaler @ 0x9056bf0] No accelerated colorspace conversion found from
 yuv420p to rgb555le.
 [swscaler @ 0x90790e0] No accelerated colorspace conversion found from
 yuv420p to rgb555le.
 Segmentation fault (core dumped)
 knoppix at Microknoppix:/media/sdb1$ ulimit -c unlimited -Sv 199999000
 knoppix at Microknoppix:/media/sdb1$ ./gdb -c core ffmpeg_g
 warning: Can not parse XML syscalls information; XML support was disabled
 at compile time.
 GNU gdb (GDB) 7.0.1-debian
 Copyright (C) 2009 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later
 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "i486-linux-gnu".
 For bug reporting instructions, please see:
 <http://www.gnu.org/software/gdb/bugs/>...
 Reading symbols from /media/sdb1/ffmpeg_g...done.

 warning: Can't read pathname for load map: Input/output error.
 Reading symbols from /lib/i386-linux-gnu/libm.so.6...(no debugging symbols
 found)...done.
 Loaded symbols for /lib/i386-linux-gnu/libm.so.6
 Reading symbols from /lib/i386-linux-gnu/librt.so.1...(no debugging
 symbols found)...done.
 Loaded symbols for /lib/i386-linux-gnu/librt.so.1
 Reading symbols from /lib/i386-linux-gnu/libpthread.so.0...(no debugging
 symbols found)...done.
 Loaded symbols for /lib/i386-linux-gnu/libpthread.so.0
 Reading symbols from /lib/i386-linux-gnu/libc.so.6...(no debugging symbols
 found)...done.
 Loaded symbols for /lib/i386-linux-gnu/libc.so.6
 Reading symbols from /lib/ld-linux.so.2...(no debugging symbols
 found)...done.
 Loaded symbols for /lib/ld-linux.so.2
 Failed to read a valid object file image from memory.
 Core was generated by `./ffmpeg_g -i o/divx.avi -y -vcodec msvideo1
 out.avi'.
 Program terminated with signal 11, Segmentation fault.
 #0  av_free (arg=0x0) at libavutil/mem.c:210
 210         free(ptr);
 (gdb) bt
 #0  av_free (arg=0x0) at libavutil/mem.c:210
 #1  av_freep (arg=0x0) at libavutil/mem.c:217
 #2  0x0808d386 in ff_ac3_encode_close (avctx=0x906e480)
     at libavcodec/ac3enc.c:2021
 #3  0x0808e46e in ff_ac3_encode_init (avctx=0x906e480)
     at libavcodec/ac3enc.c:2488
 #4  0x08658dd9 in avcodec_open2 (avctx=0x906e480, codec=0x8a65a00,
     options=0x906e998) at libavcodec/utils.c:1309
 #5  0x080b3478 in transcode_init () at ffmpeg.c:2439
 #6  0x0809d120 in transcode (argc=<value optimized out>, argv=0xbfe1b534)
     at ffmpeg.c:3183
 #7  main (argc=<value optimized out>, argv=0xbfe1b534) at ffmpeg.c:3390
 (gdb)
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2730#comment:4>
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