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avformat/flvdec: Check double before cast in parse_keyframes_index()
Fixes: -2.21166e+304 is outside the range of representable values of type 'long' Fixes: 29169/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5725452796821504 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -453,9 +453,13 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t m
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}
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for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
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double d;
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if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
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goto invalid;
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current_array[0][i] = av_int2double(avio_rb64(ioc));
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d = av_int2double(avio_rb64(ioc));
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if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
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goto invalid;
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current_array[0][i] = d;
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}
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if (times && filepositions) {
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// All done, exiting at a position allowing amf_parse_object
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