kernel security and bug fix update

[2.6.32-504.1.3]

• Revert: [net] revert ‘bridge: Set vlan_features to allow offloads on vlans’ (Vlad Yasevich) [1144442 1121991]
  [2.6.32-504.1.2]
• [x86] kvm: fix PIT timer race condition (mguzik) [1149592 1149593] {CVE-2014-3611}
• [x86] kvm: vmx: handle invept and invvpid vm exits gracefull (mguzik) [1144826 1144837 1144827 1144838] {CVE-2014-3646 CVE-2014-3645}
  [2.6.32-504.1.1]
• [fs] call d_op->d_hash on last component of umount path (Abhijith Das) [1145193 1129712]
• [usb] serial: memory corruption flaw (Jacob Tanenbaum) [1141401 1141402] {CVE-2014-3185}
• [char] ipmi: Clear drvdata when interface is removed (Tony Camuso) [1149578 1135910]
• [char] ipmi: init shadow_ipmi_smi_handlers early in ipmi_si_intf (Tony Camuso) [1149580 1139464]
• [net] ipsec: update MAX_AH_AUTH_LEN to support sha512 (Herbert Xu) [1149083 1140103]
• [net] revert ‘bridge: Set vlan_features to allow offloads on vlans’ (Vlad Yasevich) [1144442 1121991]
• [netdrv] virtio-net: fix big buffer receiving (Jason Wang) [1148693 1144073]
• [netdrv] tg3: prevent ifup/ifdown during PCI error recovery (Ivan Vecera) [1142570 1117009]