void NuPlayer::GenericSource::fetchTextData(
 uint32_t sendWhat,
        media_track_type type,
 int32_t curGen,
        sp<AnotherPacketSource> packets,
        sp<AMessage> msg) {
 int32_t msgGeneration;
    CHECK(msg->findInt32("generation", &msgGeneration));
 if (msgGeneration != curGen) {
 return;
 }

 int32_t avail;
 if (packets->hasBufferAvailable(&avail)) {
 return;
 }

 int64_t timeUs;
    CHECK(msg->findInt64("timeUs", &timeUs));

 int64_t subTimeUs;
    readBuffer(type, timeUs, &subTimeUs);

 int64_t delayUs = subTimeUs - timeUs;
 if (msg->what() == kWhatFetchSubtitleData) {
 const int64_t oneSecUs = 1000000ll;
        delayUs -= oneSecUs;
 }
    sp<AMessage> msg2 = new AMessage(sendWhat, id());
    msg2->setInt32("generation", msgGeneration);
    msg2->post(delayUs < 0 ? 0 : delayUs);
}

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.