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Avoid negative valid bits in adtsRead_DecodeHeader()
Avoid negative valid bits in adtsRead_DecodeHeader() and prevent unsigned integer overflow. Bug: 146937602 Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc Change-Id: I264ff99e0461352ae5c2b2031393b67a7fa44571
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@ -1,7 +1,7 @@
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/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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© Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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@ -322,7 +322,13 @@ TRANSPORTDEC_ERROR adtsRead_DecodeHeader(HANDLE_ADTS pAdts,
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CProgramConfig_Read(&pAsc->m_progrConfigElement, hBs, alignAnchor);
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adtsRead_CrcEndReg(pAdts, hBs, crcReg);
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pceBits = alignAnchor - FDKgetValidBits(hBs);
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pceBits = (INT)alignAnchor - (INT)FDKgetValidBits(hBs);
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adtsHeaderLength += pceBits;
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if (pceBits > (INT)alignAnchor) {
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goto bail;
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}
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/* store the number of PCE bits */
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bs.num_pce_bits = pceBits;
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} else {
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