various fixes:

various fixes:

CVE-2016-9776:
 net: mcf: check receive buffer size register value
CVE-2016-9845:
 virtio-gpu: fix information leak in getting capset info dispatch
CVE-2016-9846:
 virtio-gpu: fix memory leak in update_cursor_data_virgl
CVE-2016-9907:
 usbredir: free vm_change_state_handler in usbredir destroy dispatch
CVE-2016-9908:
 virtio-gpu: fix information leak in capset get dispatch
CVE-2016-9911:
 usb: ehci: fix memory leak in ehci_init_transfer
CVE-2016-9912:
 virtio-gpu: call cleanup mapping function in resource destroy
CVE-2016-9913:
 9pfs: adjust the order of resource cleanup in device unrealize
CVE-2016-9914:
 9pfs: add cleanup operation in FileOperations
CVE-2016-9915:
 9pfs: add cleanup operation for handle backend driver
CVE-2016-9916:
 9pfs: add cleanup operation for proxy backend driver
CVE-2016-9921 and
CVE-2016-9922:
 display: cirrus: check vga bits per pixel(bpp) value