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Check validity of channels & samplerate.
This may be security relevant. Based on 2 patches by chrome. Originally committed as revision 19975 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -848,8 +848,16 @@ static int vorbis_parse_id_hdr(vorbis_context *vc){
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}
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vc->version=get_bits_long(gb, 32); //FIXME check 0
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vc->audio_channels=get_bits(gb, 8); //FIXME check >0
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vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
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vc->audio_channels=get_bits(gb, 8);
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if(vc->audio_channels <= 0){
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av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
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return -1;
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}
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vc->audio_samplerate=get_bits_long(gb, 32);
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if(vc->audio_samplerate <= 0){
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av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
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return -1;
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}
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vc->bitrate_maximum=get_bits_long(gb, 32);
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vc->bitrate_nominal=get_bits_long(gb, 32);
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vc->bitrate_minimum=get_bits_long(gb, 32);
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