status_t ACodec::freeBuffer(OMX_U32 portIndex, size_t i) {
 BufferInfo *info = &mBuffers[portIndex].editItemAt(i);
 status_t err = OK;

 MetadataBufferType type =
        portIndex == kPortIndexOutput ? mOutputMetadataType : mInputMetadataType;
 if (type == kMetadataBufferTypeANWBuffer && info->mData != NULL
 && info->mData->size() >= sizeof(VideoNativeMetadata)) {
 int fenceFd = ((VideoNativeMetadata *)info->mData->data())->nFenceFd;
 if (fenceFd >= 0) {
            ALOGW("unreleased fence (%d) in %s metadata buffer %zu",
                    fenceFd, portIndex == kPortIndexInput ? "input" : "output", i);
 }
 }

 switch (info->mStatus) {
 case BufferInfo::OWNED_BY_US:
 if (portIndex == kPortIndexOutput && mNativeWindow != NULL) {
 (void)cancelBufferToNativeWindow(info);
 }

 case BufferInfo::OWNED_BY_NATIVE_WINDOW:
            err = mOMX->freeBuffer(mNode, portIndex, info->mBufferID);
 break;

 default:
            ALOGE("trying to free buffer not owned by us or ANW (%d)", info->mStatus);
            err = FAILED_TRANSACTION;
 break;
 }

 if (info->mFenceFd >= 0) {
 ::close(info->mFenceFd);
 }

 if (portIndex == kPortIndexOutput) {
        mRenderTracker.untrackFrame(info->mRenderInfo, i);
        info->mRenderInfo = NULL;
 }

    mBuffers[portIndex].removeAt(i);
 return err;
}

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.