[FFmpeg-trac] #2140(avfilter:reopened): Crash using mp=il=i on gray input
FFmpeg
trac at avcodec.org
Tue Feb 5 23:39:23 CET 2013
#2140: Crash using mp=il=i on gray input
-------------------------------------+-------------------------------------
Reporter: cehoyos | Owner:
Type: defect | Status: reopened
Priority: important | Component: avfilter
Version: git-master | Resolution:
Keywords: crash | Blocked By:
SIGSEGV mp | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Changes (by cehoyos):
* status: closed => reopened
* resolution: fixed =>
Comment:
{{{
(gdb) r -i gray.png -vf mp=il=i gray2.png
Starting program: ffmpeg_g -i gray.png -vf mp=il=i gray2.png
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
ffmpeg version N-49616-gf0eacbc Copyright (c) 2000-2013 the FFmpeg
developers
built on Feb 5 2013 23:36:50 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --disable-indev=jack
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 35.101 / 3. 35.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, image2, from 'gray.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, gray, 256x256, 25 tbr, 25 tbn, 25 tbc
[Parsed_mp_0 @ 0x160f5c0] 'il' is a wrapped MPlayer filter (libmpcodecs).
This filter may be removed
once it has been ported to a native libavfilter.
[New Thread 0x7ffff6563700 (LWP 23337)]
[New Thread 0x7ffff5d62700 (LWP 23338)]
[New Thread 0x7ffff5561700 (LWP 23339)]
[New Thread 0x7ffff4d60700 (LWP 23340)]
[New Thread 0x7fffe7fff700 (LWP 23341)]
[New Thread 0x7fffe77fe700 (LWP 23342)]
[New Thread 0x7fffe6ffd700 (LWP 23343)]
[New Thread 0x7fffe67fc700 (LWP 23344)]
Output #0, image2, to 'gray2.png':
Metadata:
encoder : Lavf54.61.104
Stream #0:0: Video: png, gray, 256x256, q=2-31, 200 kb/s, 90k tbn, 25
tbc
Stream mapping:
Stream #0:0 -> #0:0 (png -> png)
Press [q] to stop, [?] for help
Program received signal SIGSEGV, Segmentation fault.
0x0000000000bbdb60 in av_image_copy (dst_data=dst_data at entry=0x15e4288,
dst_linesizes=dst_linesizes at entry=0x15e42d0,
src_data=src_data at entry=0x15e32c8,
src_linesizes=src_linesizes at entry=0x15e3310, pix_fmt=AV_PIX_FMT_GRAY8,
width=256,
height=256) at libavutil/imgutils.c:272
272 memcpy(dst_data[1], src_data[1], 4*256);
(gdb) bt
#0 0x0000000000bbdb60 in av_image_copy
(dst_data=dst_data at entry=0x15e4288,
dst_linesizes=dst_linesizes at entry=0x15e42d0,
src_data=src_data at entry=0x15e32c8,
src_linesizes=src_linesizes at entry=0x15e3310, pix_fmt=AV_PIX_FMT_GRAY8,
width=256,
height=256) at libavutil/imgutils.c:272
#1 0x000000000046e497 in ff_filter_frame_framed
(link=link at entry=0x15fc960,
frame=frame at entry=0x15e32c0) at libavfilter/avfilter.c:693
#2 0x000000000046e8a1 in ff_filter_frame (frame=0x15e32c0,
link=0x15fc960)
at libavfilter/avfilter.c:791
#3 default_filter_frame (link=<optimized out>, frame=0x15e32c0) at
libavfilter/avfilter.c:638
#4 0x000000000046e606 in ff_filter_frame_framed
(link=link at entry=0x15fc2a0,
frame=frame at entry=0x15e32c0) at libavfilter/avfilter.c:719
#5 0x000000000047025b in ff_filter_frame (link=link at entry=0x15fc2a0,
frame=frame at entry=0x15e32c0) at libavfilter/avfilter.c:791
#6 0x000000000048923c in ff_vf_next_put_image (vf=0x160f660,
mpi=0x15e3110, pts=0)
at libavfilter/vf_mp.c:588
#7 0x0000000000488ee2 in filter_frame (inlink=0x15fc880, inpic=0x15ff800)
at libavfilter/vf_mp.c:824
#8 0x000000000046e606 in ff_filter_frame_framed
(link=link at entry=0x15fc880,
frame=frame at entry=0x15ff800) at libavfilter/avfilter.c:719
#9 0x000000000047025b in ff_filter_frame (link=link at entry=0x15fc880,
frame=0x15ff800)
at libavfilter/avfilter.c:791
#10 0x0000000000473242 in request_frame (link=0x15fc880) at
libavfilter/buffersrc.c:396
#11 0x0000000000473694 in av_buffersrc_add_ref (s=0x160f4c0, buf=0x0,
flags=flags at entry=7)
at libavfilter/buffersrc.c:151
#12 0x000000000045b76d in decode_video (ist=ist at entry=0x1606ce0,
pkt=pkt at entry=0x7fffffffdb00,
got_output=got_output at entry=0x7fffffffd89c) at ffmpeg.c:1715
#13 0x000000000045e8bf in output_packet (pkt=0x7fffffffdaa0,
ist=0x1606ce0) at ffmpeg.c:1835
#14 process_input (file_index=<optimized out>) at ffmpeg.c:2988
#15 0x000000000044ecc0 in transcode_step () at ffmpeg.c:3084
#16 transcode () at ffmpeg.c:3136
#17 main (argc=<optimized out>, argv=<optimized out>) at ffmpeg.c:3311
(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0xbbdb40 to 0xbbdb80:
0x0000000000bbdb40 <av_image_copy+848>: add %al,(%rax)
0x0000000000bbdb42 <av_image_copy+850>: add %al,-0xa(%rax)
0x0000000000bbdb45 <av_image_copy+853>: movl $0x10d850f,(%rdx)
0x0000000000bbdb4b <av_image_copy+859>: add %al,(%rax)
0x0000000000bbdb4d <av_image_copy+861>: test $0x4,%dil
0x0000000000bbdb51 <av_image_copy+865>: jne 0xbbdc46
<av_image_copy+1110>
0x0000000000bbdb57 <av_image_copy+871>: mov %eax,%ecx
0x0000000000bbdb59 <av_image_copy+873>: xor %edx,%edx
0x0000000000bbdb5b <av_image_copy+875>: shr $0x3,%ecx
0x0000000000bbdb5e <av_image_copy+878>: test $0x4,%al
=> 0x0000000000bbdb60 <av_image_copy+880>: rep movsq
%ds:(%rsi),%es:(%rdi)
0x0000000000bbdb63 <av_image_copy+883>: je 0xbbdb6e
<av_image_copy+894>
0x0000000000bbdb65 <av_image_copy+885>: mov (%rsi),%edx
0x0000000000bbdb67 <av_image_copy+887>: mov %edx,(%rdi)
0x0000000000bbdb69 <av_image_copy+889>: mov $0x4,%edx
0x0000000000bbdb6e <av_image_copy+894>: test $0x2,%al
0x0000000000bbdb70 <av_image_copy+896>: je 0xbbdb7e
<av_image_copy+910>
0x0000000000bbdb72 <av_image_copy+898>: movzwl (%rsi,%rdx,1),%ecx
0x0000000000bbdb76 <av_image_copy+902>: mov %cx,(%rdi,%rdx,1)
0x0000000000bbdb7a <av_image_copy+906>: add $0x2,%rdx
0x0000000000bbdb7e <av_image_copy+910>: test $0x1,%al
End of assembler dump.
(gdb) info register
rax 0x400 1024
rbx 0x100 256
rcx 0x80 128
rdx 0x0 0
rsi 0x0 0
rdi 0x1656c40 23424064
rbp 0x100 0x100
rsp 0x7fffffffd1f0 0x7fffffffd1f0
r8 0x1656c30 23424048
r9 0x0 0
r10 0x0 0
r11 0x7ffff68d1b20 140737329830688
r12 0x16469e0 23357920
r13 0x1656c40 23424064
r14 0x0 0
r15 0x100 256
rip 0xbbdb60 0xbbdb60 <av_image_copy+880>
eflags 0x10246 [ PF ZF IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2140#comment:2>
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