[FFmpeg-trac] #7049(undetermined:new): HLS streaming crashes, when "http_persistent" option enabled

[FFmpeg]

#7049: HLS streaming crashes, when "http_persistent" option enabled
-------------------------------------+-------------------------------------
             Reporter:  mars         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 FFmpeg crashes when streaming HLS to remote server with "http_persistent"
 option enabled.
 After ~10 minute streaming it crashes with SIGSEGV.

 Remote server is nginx with dav module. Configuration example:
 {{{
 location / {
     root  www;

     client_body_temp_path www/client_temp;

     dav_methods PUT DELETE;

     create_full_put_path  on;
     min_delete_depth 1;
     autoindex on;
     autoindex_format json;
     autoindex_exact_size off;
     autoindex_localtime off;

     add_header Accept-Ranges bytes;
 }
 }}}

 How to reproduce:
 {{{
 % ffmpeg -v 9 -loglevel 99 -report -re -i
 ~/_garbage/samples/Starcraft_2_Replay.mkv -vcodec copy -hls_time 5
 -http_persistent 1 -method 'PUT' -f HLS http://localhost/hls/test.m3u8

 ffmpeg version N-48357-g2dfa362093 Copyright (c) 2000-2018 the FFmpeg
 developers
   built with gcc 7 (Ubuntu 7.2.0-8ubuntu3.2)
   configuration: --enable-shared --enable-nonfree --enable-gpl --enable-
 version3 --enable-hwaccels --enable-libfdk-aac --enable-libmp3lame
 --enable-libx264 --enable-libx265 --enable-libvpx --enable-openssl
 --enable-libzvbi --enable-libspeex
 }}}


 Core dump:
 {{{
 Program terminated with signal SIGSEGV, Segmentation fault.
 #0  ffurl_write (h=0x0, buf=buf at entry=0x7fff5a7538e2 "0\r\n\r\n",
 size=size at entry=5) at libavformat/avio.c:423
 423         if (!(h->flags & AVIO_FLAG_WRITE))
 [Current thread is 1 (Thread 0x7feabc7268c0 (LWP 17245))]
 (gdb) bt full
 #0  ffurl_write (h=0x0, buf=buf at entry=0x7fff5a7538e2 "0\r\n\r\n",
 size=size at entry=5) at libavformat/avio.c:423
 No locals.
 #1  0x00007feabbaf4326 in http_shutdown (h=<optimized out>,
 flags=<optimized out>) at libavformat/http.c:1623
         ret = 0
         footer = "0\r\n\r\n"
         s = 0x5574239a6000
 #2  0x00007feabbaee688 in hlsenc_io_close (filename=0x7fff5a7539b0
 "http://localhost/hls/test.m3u8", pb=0x5574238d7670, s=0x5574238a8d80) at
 libavformat/hlsenc.c:288
         http_url_context = 0x5574239d6700
         hls = <optimized out>
         http_base_proto = <optimized out>
 #3  hls_window (s=s at entry=0x5574238a8d80, last=last at entry=0,
 vs=vs at entry=0x557423918280) at libavformat/hlsenc.c:1434
         hls = 0x5574238d6d00
         en = <optimized out>
         target_duration = <optimized out>
         ret = -32
         temp_filename =
 "http://localhost/hls/test.m3u8\000\002\020:uZ\377\177\000\000\032\000\000\000\377\177\000\000\030\000\000\000\000\000\000\000\220\001\000\000\000\000\000\000\240\001\000\000\000\000\000\000\000\026\314\300%\350\362\002@:uZ\377\177\000\000@:uZ\377\177\000\000\300\000\000\000\000\000\000\000\300\001\000\000\000\000\000\000\006\000\000\000\000\000\000\000\032\000\000\000\066",
 '\000' <repeats 17 times>,
 "\061\060\067\063\067\064\061\070\062\062\000\026\314\300%\350\362\002\220:uZ\377\177\000\000\220:uZ\377\177\000\000p=uZ\377\177\000\000\252\355û\352\177\000\000\020<uZ\377\177\000\000\001"...
         sequence = 97
         proto = <optimized out>
         use_rename = 0
         warned_non_file = 102
         key_uri = <optimized out>
         iv_string = <optimized out>
         options = 0x0
         prog_date_time = 486.40000000000038
         prog_date_time_p = <optimized out>
         byterange_mode = <optimized out>
 #4  0x00007feabbaf25b6 in hls_write_packet (s=0x5574238a8d80,
 pkt=<optimized out>) at libavformat/hlsenc.c:2264
         old_filename = 0x5574238a5320 "\200.\222#tU"
         byterange_mode = <optimized out>
         hls = 0x5574238d6d00
         oc = 0x557423918840
         st = <optimized out>
         end_pts = <optimized out>
         is_ref_pkt = <optimized out>
         ret = <optimized out>
         can_split = <optimized out>
         i = <optimized out>
         j = <optimized out>
         stream_index = 0
         range_length = <optimized out>
         buffer = 0x0
         vs = 0x557423918280
 #5  0x00007feabbb65558 in write_packet (pkt=0x7fff5a753f00,
 s=0x5574238a8d80) at libavformat/mux.c:747
         ret = <optimized out>
         pts_backup = 46080000
         dts_backup = 46076400
 #6  av_interleaved_write_frame (s=0x5574238a8d80, pkt=0x0) at
 libavformat/mux.c:1231
         opkt = {buf = 0x55742392b400, pts = 46083600, dts = 46080000, data
 = 0x557423b08ff0 "", size = 221256, stream_index = 0, flags = 1, side_data
 = 0x0, side_data_elems = 0, duration = 3600, pos = -1,
           convergence_duration = 0}
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7049>
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