[FFmpeg-trac] #8253(undetermined:new): Segmentation fault in av_frame_ref at libavutil/frame.c:453
FFmpeg
trac at avcodec.org
Fri Oct 11 08:36:13 EEST 2019
#8253: Segmentation fault in av_frame_ref at libavutil/frame.c:453
-------------------------------------+-------------------------------------
Reporter: Suhwan | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
There is a Segmentation fault in av_frame_ref at libavutil/frame.c:453
{{{
Thread 1 "ffmpeg_g" received signal SIGSEGV, Segmentation fault.
av_frame_ref (dst=0x24153c0, src=0x0) at libavutil/frame.c:453
453 dst->channels = src->channels;
(gdb) bt
#0 av_frame_ref (dst=0x24153c0, src=0x0) at libavutil/frame.c:453
#1 0x00000000013d4f0d in av_frame_clone (src=0x0) at
libavutil/frame.c:547
#2 0x00000000004b3b66 in request_frame (outlink=<optimized out>) at
libavfilter/vf_deflicker.c:423
#3 0x0000000000452f92 in ff_request_frame_to_filter (link=0x2307600) at
libavfilter/avfilter.c:458
#4 0x0000000000451e55 in forward_status_change (filter=<optimized out>,
in=<optimized out>)
at libavfilter/avfilter.c:1243
#5 ff_filter_activate_default (filter=<optimized out>) at
libavfilter/avfilter.c:1274
#6 ff_filter_activate (filter=0x23054c0) at libavfilter/avfilter.c:1430
#7 0x000000000045777c in push_frame (graph=0x22e2900) at
libavfilter/buffersrc.c:187
#8 av_buffersrc_close (ctx=<optimized out>, pts=<optimized out>, flags=4)
at libavfilter/buffersrc.c:275
#9 0x000000000041f8a7 in ifilter_send_eof (ifilter=0x1ffffffff,
pts=<optimized out>)
at fftools/ffmpeg.c:2213
#10 send_filter_eof (ist=<optimized out>) at fftools/ffmpeg.c:2562
#11 process_input_packet (ist=<optimized out>, pkt=<optimized out>,
no_eof=<optimized out>)
at fftools/ffmpeg.c:2701
#12 0x000000000041c465 in process_input (file_index=<optimized out>) at
fftools/ffmpeg.c:4313
#13 transcode_step () at fftools/ffmpeg.c:4638
#14 transcode () at fftools/ffmpeg.c:4692
#15 0x0000000000419377 in main (argc=<optimized out>, argv=<optimized
out>) at fftools/ffmpeg.c:4894
(gdb) list
448 av_assert1(dst->channels == 0);
449
450 dst->format = src->format;
451 dst->width = src->width;
452 dst->height = src->height;
453 dst->channels = src->channels;
454 dst->channel_layout = src->channel_layout;
455 dst->nb_samples = src->nb_samples;
456
457 ret = frame_copy_props(dst, src, 0);
(gdb) print src
$1 = (const AVFrame *) 0x0
(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0x13d441e to 0x13d445e:
0x00000000013d441e <av_frame_get_buffer+942>: pop %rsi
0x00000000013d441f <av_frame_get_buffer+943>: pop %r15
0x00000000013d4421 <av_frame_get_buffer+945>: pop %rbp
0x00000000013d4422 <av_frame_get_buffer+946>: retq
0x00000000013d4423: data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
0x00000000013d4430 <av_frame_ref+0>: push %rbp
0x00000000013d4431 <av_frame_ref+1>: push %r15
0x00000000013d4433 <av_frame_ref+3>: push %r14
0x00000000013d4435 <av_frame_ref+5>: push %r12
0x00000000013d4437 <av_frame_ref+7>: push %rbx
0x00000000013d4438 <av_frame_ref+8>: mov %rsi,%rbp
0x00000000013d443b <av_frame_ref+11>: mov %rdi,%r12
=> 0x00000000013d443e <av_frame_ref+14>: mov 0x1bc(%rbp),%eax
0x00000000013d4444 <av_frame_ref+20>: mov %eax,0x1bc(%r12)
0x00000000013d444c <av_frame_ref+28>: mov 0x118(%rbp),%rax
0x00000000013d4453 <av_frame_ref+35>: mov %rax,0x118(%r12)
0x00000000013d445b <av_frame_ref+43>: movups 0x68(%rbp),%xmm0
End of assembler dump.
}}}
How to reproduce:
{{{
% ffmpeg_g -y -r 0 -i $PoC1 -i $PoC2 -filter_complex deflicker -target dvd
-loglevel 99 -vbsf mpeg2_metadata tmp.tta
ffmpeg version N-95314-g1331e00179 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
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8253>
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