Opened 5 years ago

Closed 5 years ago

#1360 closed defect (fixed)

Crash when decoding xan_wc3

Reported by: cehoyos Owned by:
Priority: important Component: avcodec
Version: git-master Keywords: xan_wc3 crash SIGSEGV
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

(gdb) r -vcodec xan_wc3 -i blox.avi -f null -
Starting program: ffmpeg_g -vcodec xan_wc3 -i blox.avi -f null -
[Thread debugging using libthread_db enabled]
[New Thread 0xb79096c0 (LWP 20453)]
ffmpeg version N-41080-g394b692 Copyright (c) 2000-2012 the FFmpeg developers
  built on May 28 2012 14:04:27 with gcc 4.3.2
  configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame --enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs
  libavutil      51. 55.100 / 51. 55.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.101 / 54.  6.101
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, avi, from 'blox.avi':
  Duration: 00:00:12.64, start: 0.000000, bitrate: 788 kb/s
    Stream #0:0: Video: xan_wc3 (BLOX / 0x584F4C42), pal8, 320x240, 23.97 tbr, 23.97 tbn, 23.97 tbc
[buffer @ 0x9020660] w:320 h:240 pixfmt:pal8 tb:100/2397 sar:0/1 sws_param:flags=2
[buffersink @ 0x9012960] No opaque field provided
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf54.6.101
    Stream #0:0: Video: rawvideo, pal8, 320x240, q=2-31, 200 kb/s, 90k tbn, 23.97 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (xan_wc3 -> rawvideo)
Press [q] to stop, [?] for help
[xan_wc3 @ 0x901e700] No palette found
Error while decoding stream #0:0
[xan_wc3 @ 0x901e700] No palette found
Error while decoding stream #0:0

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb79096c0 (LWP 20453)]
xan_decode_frame (avctx=0x901e700, data=0x9012da0, data_size=0xbf9995e4,
    avpkt=0xbf999220) at libavcodec/xan.c:518
518                 tag  = bytestream_get_le32(&buf);
(gdb) bt
#0  xan_decode_frame (avctx=0x901e700, data=0x9012da0, data_size=0xbf9995e4,
    avpkt=0xbf999220) at libavcodec/xan.c:518
#1  0x0858e1a5 in avcodec_decode_video2 (avctx=0x901e700, picture=0x9012da0,
    got_picture_ptr=0xbf9994c4, avpkt=0x95d) at libavcodec/utils.c:1464
#2  0x08058a3e in output_packet (ist=0x901efa0, pkt=0xbf99a95c)
    at ffmpeg.c:2645
#3  0x0805b410 in transcode () at ffmpeg.c:3662
#4  0x0805c556 in main (argc=144186336, argv=0x0) at ffmpeg.c:5926
(gdb) disass $pc-32 $pc+32
Dump of assembler code from 0x86b569e to 0x86b56de:
0x086b569e <xan_decode_frame+222>:      std
0x086b569f <xan_decode_frame+223>:      or     %cl,(%edi)
0x086b56a1 <xan_decode_frame+225>:      mov    -0x1(%edx),%ss
0x086b56a4 <xan_decode_frame+228>:      (bad)
0x086b56a5 <xan_decode_frame+229>:      incl   0x5624247c(%ecx)
0x086b56ab <xan_decode_frame+235>:      inc    %edi
0x086b56ac <xan_decode_frame+236>:      inc    %ecx
0x086b56ad <xan_decode_frame+237>:      and    %cl,(%edi)
0x086b56af <xan_decode_frame+239>:      test   %al,-0x1(%edi,%edi,8)
0x086b56b3 <xan_decode_frame+243>:      decl   0xa82494(%ebx)
0x086b56b9 <xan_decode_frame+249>:      add    %al,(%eax)
0x086b56bb <xan_decode_frame+251>:      lea    0x8(%ebx),%ebp
0x086b56be <xan_decode_frame+254>:      mov    (%ebx),%esi
0x086b56c0 <xan_decode_frame+256>:      sub    %ebp,%edx
0x086b56c2 <xan_decode_frame+258>:      mov    %esi,0x24(%esp)
0x086b56c6 <xan_decode_frame+262>:      mov    -0x4(%ebp),%eax
0x086b56c9 <xan_decode_frame+265>:      bswap  %eax
0x086b56cb <xan_decode_frame+267>:      cmp    %edx,%eax
0x086b56cd <xan_decode_frame+269>:      jle    0x86b56d1 <xan_decode_frame+273>
0x086b56cf <xan_decode_frame+271>:      mov    %edx,%eax
0x086b56d1 <xan_decode_frame+273>:      cmpl   $0x544c4150,0x24(%esp)
0x086b56d9 <xan_decode_frame+281>:      jne    0x86b5678 <xan_decode_frame+184>
0x086b56db <xan_decode_frame+283>:      cmp    $0x2ff,%eax
End of assembler dump.
(gdb) info register
eax            0x8410f8df       -2079262497
ecx            0x901e700        151119616
edx            0x9013cca        151076042
ebx            0x8d122d87       -1928188537
esp            0xbf998fa0       0xbf998fa0
ebp            0x8d122d8f       0x8d122d8f
esi            0xfa7b97af       -92563537
edi            0xffffffff       -1
eip            0x86b56be        0x86b56be <xan_decode_frame+254>
eflags         0x10286  [ PF SF IF RF ]
cs             0x73     115
ss             0x7b     123
ds             0x7b     123
es             0x7b     123
fs             0x0      0
gs             0x33     51

Attachments (1)

blox.avi (1.2 MB) - added by cehoyos 5 years ago.

Download all attachments as: .zip

Change History (2)

Changed 5 years ago by cehoyos

comment:1 Changed 5 years ago by michael

  • Reproduced by developer set
  • Resolution set to fixed
  • Status changed from new to closed
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