status_t NuPlayer::GenericSource::prefillCacheIfNecessary() {
    CHECK(mDataSource != NULL);

 if (mCachedSource == NULL) {
 return OK;
 }

 if (!strncasecmp(mContentType.string(), "audio/", 6)) {
 return OK;
 }


 static const size_t kMinBytesForSniffing = 192 * 1024;
 static const size_t kDefaultMetaSize = 200000;

 status_t finalStatus;

 size_t cachedDataRemaining =
            mCachedSource->approxDataRemaining(&finalStatus);

 if (finalStatus != OK || (mMetaDataSize >= 0
 && (off64_t)cachedDataRemaining >= mMetaDataSize)) {
        ALOGV("stop caching, status %d, "
 "metaDataSize %lld, cachedDataRemaining %zu",
                finalStatus, mMetaDataSize, cachedDataRemaining);
 return OK;
 }

    ALOGV("now cached %zu bytes of data", cachedDataRemaining);

 if (mMetaDataSize < 0
 && cachedDataRemaining >= kMinBytesForSniffing) {
 String8 tmp;
 float confidence;
        sp<AMessage> meta;
 if (!mCachedSource->sniff(&tmp, &confidence, &meta)) {
 return UNKNOWN_ERROR;
 }

        mSniffedMIME = tmp.string();

 if (meta == NULL
 || !meta->findInt64("meta-data-size",
 reinterpret_cast<int64_t*>(&mMetaDataSize))) {
            mMetaDataSize = kDefaultMetaSize;
 }

 if (mMetaDataSize < 0ll) {
            ALOGE("invalid metaDataSize = %lld bytes", mMetaDataSize);
 return UNKNOWN_ERROR;
 }
 }

 return -EAGAIN;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.