Magento 1.9.2.2 SUPEE-9767 Patch ERROR

Question

Below is the error log:

ERROR: Patch can't be applied/reverted successfully.

patching file app/code/core/Mage/Admin/Model/Session.php
patching file app/code/core/Mage/Adminhtml/Block/Checkout/Formkey.php
patching file app/code/core/Mage/Adminhtml/Block/Notification/Symlink.php
patching file app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column/Filter/Date.php
patching file app/code/core/Mage/Adminhtml/Model/Config/Data.php
patching file app/code/core/Mage/Adminhtml/controllers/Catalog/Product/GalleryController.php
patching file app/code/core/Mage/Checkout/controllers/MultishippingController.php
patching file app/code/core/Mage/Checkout/controllers/OnepageController.php
Hunk #1 succeeded at 350 (offset 1 line).
Hunk #2 succeeded at 370 (offset 1 line).
Hunk #3 succeeded at 417 (offset 1 line).
Hunk #4 succeeded at 446 (offset 1 line).
Hunk #5 succeeded at 485 (offset 1 line).
patching file app/code/core/Mage/Checkout/etc/system.xml
patching file app/code/core/Mage/Cms/Model/Wysiwyg/Images/Storage.php
Hunk #1 succeeded at 282 (offset -1 lines).
patching file app/code/core/Mage/Core/Controller/Front/Action.php
patching file app/code/core/Mage/Core/Controller/Request/Http.php
patching file app/code/core/Mage/Core/Model/File/Validator/Image.php
patching file app/code/core/Mage/Core/etc/system.xml
patching file app/code/core/Mage/Customer/Model/Session.php
patching file app/code/core/Mage/Dataflow/Model/Convert/Adapter/Zend/Cache.php
patching file app/code/core/Mage/Dataflow/Model/Convert/Container/Abstract.php
patching file app/code/core/Mage/Dataflow/Model/Convert/Parser/Csv.php
patching file app/code/core/Mage/Dataflow/Model/Convert/Parser/Xml/Excel.php
patching file app/code/core/Mage/ImportExport/Model/Import/Uploader.php
patching file app/code/core/Mage/Sales/Model/Quote/Item.php
Hunk #1 FAILED at 500.
1 out of 1 hunk FAILED -- saving rejects to file app/code/core/Mage/Sales/Model/Quote/Item.php.rej
patching file app/code/core/Mage/Widget/Model/Widget/Instance.php
patching file app/code/core/Mage/XmlConnect/Helper/Image.php
patching file app/code/core/Mage/XmlConnect/controllers/Adminhtml/MobileController.php
patching file app/design/adminhtml/default/default/layout/main.xml
patching file app/design/adminhtml/default/default/template/notification/formkey.phtml
patching file app/design/adminhtml/default/default/template/notification/symlink.phtml
patching file app/design/adminhtml/default/default/template/page/head.phtml
patching file app/design/frontend/base/default/template/checkout/cart/shipping.phtml
patching file app/design/frontend/base/default/template/checkout/multishipping/billing.phtml
patching file app/design/frontend/base/default/template/checkout/multishipping/shipping.phtml
patching file app/design/frontend/base/default/template/checkout/onepage/billing.phtml
patching file app/design/frontend/base/default/template/checkout/onepage/payment.phtml
Hunk #1 succeeded at 35 (offset -1 lines).
patching file app/design/frontend/base/default/template/checkout/onepage/shipping.phtml
patching file app/design/frontend/base/default/template/checkout/onepage/shipping_method.phtml
patching file app/design/frontend/base/default/template/persistent/checkout/onepage/billing.phtml
patching file app/design/frontend/rwd/default/layout/page.xml
patching file app/design/frontend/rwd/default/template/checkout/cart/shipping.phtml
patching file app/design/frontend/rwd/default/template/checkout/multishipping/addresses.phtml
patching file app/design/frontend/rwd/default/template/checkout/multishipping/billing.phtml
patching file app/design/frontend/rwd/default/template/checkout/onepage/payment.phtml
Hunk #1 succeeded at 36 (offset -1 lines).
patching file app/design/frontend/rwd/default/template/checkout/onepage/shipping.phtml
patching file app/design/frontend/rwd/default/template/persistent/checkout/onepage/billing.phtml
patching file app/etc/config.xml
patching file app/locale/en_US/Mage_Adminhtml.csv
Hunk #1 succeeded at 1281 (offset -4 lines).
patching file app/locale/en_US/Mage_Core.csv
Hunk #1 succeeded at 404 (offset -3 lines).
patching file app/locale/en_US/Mage_Dataflow.csv
patching file app/locale/en_US/Mage_XmlConnect.csv
patching file downloader/Maged/Connect.php
patching file downloader/Maged/Controller.php
Hunk #1 succeeded at 417 (offset -4 lines).
Hunk #2 succeeded at 964 (offset -15 lines).
patching file downloader/Maged/Model/Session.php
Hunk #1 succeeded at 82 with fuzz 2.
Hunk #2 succeeded at 268 (offset -5 lines).
patching file js/lib/jquery/jquery-1.12.0.js
patching file js/lib/jquery/jquery-1.12.0.min.js
patching file js/lib/jquery/jquery-1.12.0.min.map
patching file js/varien/payment.js
patching file skin/frontend/base/default/js/opcheckout.js
Hunk #1 succeeded at 711 (offset 27 lines).

I have confirmed that app/code/core/Mage/Sales/Model/Quote/Item.php core file is unchanged. Still, the patch is giving error.

Answer 1

I am pretty Sure that you are getting error in this file checking file app/code/core/Mage/Sales/Model/Quote/Item.php because of following two reasons:

1st reason :

You Have not applied SUPEE-7405 : In this case first Apply SUPEE-7405 and then Apply this patch

2nd Reason:

You have manually modified this file: in this case download magento 1.9.3 and revert this file from that version and apply this patch after that again put your custom code into that.

I Advice you to not to modify core files instead rewriting the classes