The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2016
Filed:
May. 27, 2015
Cisco Technology, Inc., San Jose, CA (US);
Joe Epstein, Palo Alto, CA (US);
CISCO TECHNOLOGY, INC., San Jose, CA (US);
Abstract
In an embodiment, a data processing method comprises implementing a memory event interface to a hypercall interface of a hypervisor or virtual machine operating system to intercept page faults associated with writing pages of memory that contain a computer program; receiving a page fault resulting from a guest domain attempting to write a memory page that is marked as not executable in a memory page permissions system; determining a first set of memory page permissions for the memory page that are maintained by the hypervisor or virtual machine operating system; determining a second set of memory page permissions for the memory page that are maintained independent of the hypervisor or virtual machine operating system; determining a particular memory page permission for the memory page based on the first set and the second set; processing the page fault based on the particular memory page permission, including performing at least one security function associated with regulating access of the guest domain to the memory page.