[FFmpeg-trac] #749(avformat:new): Apple HTTP Live Streaming segfault

[FFmpeg]

#749: Apple HTTP Live Streaming segfault
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               Reporter:  takis       |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  important   |              Component:  avformat
                Version:  git-master  |               Keywords:
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
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 Regarding applehttp.c:
 If av_probe_input_buffer() fails in applehttp_read_header(), the code
 jumps to fail, which invokes free_variant_list() which in turn invokes
 avformat_close_input(), which can cause a segmentation fault if its
 AVInputFormat has not yet been intialized.

 av_probe_input_buffer() can fail when the playlist contains URLs which the
 underlying TCP code can't connect to. av_probe_input_buffer uses avio_read
 which invokes
 read_data->open_input->ffurl_open->ffurl_connect->url_open2-> ...
 ->tcp_open->connect.


 So, if you have a playlist such the one below:
 EXTM3U
 #EXT-X-TARGETDURATION:60
 #EXT-X-MEDIA-SEQUENCE:0
 #EXTINF:60,
 http://172.19.40.153/20111214/stream0q2v1/fileSequence0.ts

 If 172.19.40.153 is not available, ffplay f.e. segfaults.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/749>
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