[FFmpeg-trac] #8235(undetermined:new): Segmentation fault in request_frame at libavfilter/vf_random.c:102

[FFmpeg]

#8235: Segmentation fault in request_frame at libavfilter/vf_random.c:102
-------------------------------------+-------------------------------------
             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 request_frame at
 libavfilter/vf_random.c:102
 {{{
 Thread 1 "ffmpeg_g" received signal SIGSEGV, Segmentation fault.
 0x00000000005256dd in request_frame (outlink=0x22cec40) at
 libavfilter/vf_random.c:102
 102             out->pts = s->pts[s->flush_idx++];
 (gdb) bt
 #0  0x00000000005256dd in request_frame (outlink=0x22cec40) at
 libavfilter/vf_random.c:102
 #1  0x0000000000452f92 in ff_request_frame_to_filter (link=0x22cec40) at
 libavfilter/avfilter.c:458
 #2  0x0000000000451e55 in forward_status_change (filter=<optimized out>,
 in=<optimized out>)
     at libavfilter/avfilter.c:1243
 #3  ff_filter_activate_default (filter=<optimized out>) at
 libavfilter/avfilter.c:1274
 #4  ff_filter_activate (filter=0x22cad40) at libavfilter/avfilter.c:1430
 #5  0x0000000000457755 in push_frame (graph=0x22b5000) at
 libavfilter/buffersrc.c:187
 #6  av_buffersrc_close (ctx=<optimized out>, pts=<optimized out>, flags=4)
 at libavfilter/buffersrc.c:275
 #7  0x000000000041f8a7 in ifilter_send_eof (ifilter=0x0, pts=<optimized
 out>) at fftools/ffmpeg.c:2213
 #8  send_filter_eof (ist=<optimized out>) at fftools/ffmpeg.c:2562
 #9  process_input_packet (ist=<optimized out>, pkt=<optimized out>,
 no_eof=<optimized out>) at fftools/ffmpeg.c:2701
 #10 0x000000000041c465 in process_input (file_index=<optimized out>) at
 fftools/ffmpeg.c:4313
 #11 transcode_step () at fftools/ffmpeg.c:4638
 #12 transcode () at fftools/ffmpeg.c:4692
 #13 0x0000000000419377 in main (argc=<optimized out>, argv=<optimized
 out>) at fftools/ffmpeg.c:4894
 (gdb) list
 97
 98          ret = ff_request_frame(ctx->inputs[0]);
 99
 100         if (ret == AVERROR_EOF && !ctx->is_disabled && s->nb_frames >
 0) {
 101             AVFrame *out = s->frames[s->nb_frames - 1];
 102             out->pts = s->pts[s->flush_idx++];
 103             ret = ff_filter_frame(outlink, out);
 104             s->frames[s->nb_frames - 1] = NULL;
 105             s->nb_frames--;
 106         }
 (gdb) print out
 $1 = (AVFrame *) 0x0
 }}}
 How to reproduce:
 {{{
 % ffmpeg_g -y -i $PoC -filter_complex random -target svcd -loglevel 99
 -map 0 -vbsf dump_extra -disposition:s:9 jpeg2000 -disposition:v:213
 msvideo1 -ab 710k tmp.dfa

 ffmpeg version N-95291-g5345965b3f 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/8235>
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