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avformat/flvdec: Check array entry number
Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int' Fixes: 30209/clusterfuzz-testcase-minimized-ffmpeg_dem_FLV_fuzzer-5724831658147840 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit b5d8fe1c874947ca67ee8117b18f8052f0e590fc) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -827,6 +827,8 @@ static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
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parse_name = 0;
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case AMF_DATA_TYPE_MIXEDARRAY:
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nb = avio_rb32(pb);
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if (nb < 0)
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return AVERROR_INVALIDDATA;
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case AMF_DATA_TYPE_OBJECT:
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while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
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if (parse_name) {
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