mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/hevc_mp4toannexb: more validations for nalu_len
For a corrupted stream, the value of nalu_len read from the extradata is not reliable. We need to perform additional checks
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@ -65,9 +65,11 @@ static int hevc_extradata_to_annexb(AVBSFContext *ctx)
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}
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}
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for (j = 0; j < cnt; j++) {
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for (j = 0; j < cnt; j++) {
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int nalu_len = bytestream2_get_be16(&gb);
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const int nalu_len = bytestream2_get_be16(&gb);
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if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) {
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if (!nalu_len ||
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nalu_len > bytestream2_get_bytes_left(&gb) ||
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4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) {
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ret = AVERROR_INVALIDDATA;
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ret = AVERROR_INVALIDDATA;
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goto fail;
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goto fail;
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}
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}
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