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avformat/rpl: Check the number of streams
Fixes: out of memory access Fixes: 27787/clusterfuzz-testcase-minimized-ffmpeg_dem_RPL_fuzzer-4743666463408128.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -253,6 +253,9 @@ static int rpl_read_header(AVFormatContext *s)
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error |= read_line(pb, line, sizeof(line));
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}
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if (s->nb_streams == 0)
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return AVERROR_INVALIDDATA;
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rpl->frames_per_chunk = read_line_and_int(pb, &error); // video frames per chunk
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if (vst && rpl->frames_per_chunk > 1 && vst->codecpar->codec_tag != 124)
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av_log(s, AV_LOG_WARNING,
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