kernel-uek security update

kernel-uek
[4.1.12-32.1.2]

• KEYS: Fix keyring ref leak in join_session_keyring() (Yevgeny Pats) [Orabug: 22563965] {CVE-2016-0728}
  [4.1.12-32.1.1]
• ocfs2: return non-zero st_blocks for inline data (John Haxby) [Orabug: 22218243]
• xen/events/fifo: Consume unprocessed events when a CPU dies (Ross Lagerwall) [Orabug: 22498877]
• Revert ‘xen/fb: allow xenfb initialization for hvm guests’ (Konrad Rzeszutek Wilk)
• xen/pciback: Dont allow MSI-X ops if PCI_COMMAND_MEMORY is not set. (Konrad Rzeszutek Wilk)
• xen/pciback: For XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled. (Konrad Rzeszutek Wilk)
• xen/pciback: Do not install an IRQ handler for MSI interrupts. (Konrad Rzeszutek Wilk)
• xen/pciback: Return error on XEN_PCI_OP_enable_msix when device has MSI or MSI-X enabled (Konrad Rzeszutek Wilk)
• xen/pciback: Return error on XEN_PCI_OP_enable_msi when device has MSI or MSI-X enabled (Konrad Rzeszutek Wilk)
• xen/pciback: Save xen_pci_op commands before processing it (Konrad Rzeszutek Wilk)
• xen-scsiback: safely copy requests (David Vrabel)
• xen-blkback: read from indirect descriptors only once (Roger Pau Monne)
• xen-blkback: only read request operation from shared ring once (Roger Pau Monne)
• xen-netback: use RING_COPY_REQUEST() throughout (David Vrabel)
• xen-netback: dont use last request to determine minimum Tx credit (David Vrabel)
• xen: Add RING_COPY_REQUEST() (David Vrabel)