[ELSA-2012-1061] kernel security and bug fix update

[2.6.18-308.11.1.el5]
- [net] ixgbe: remove flow director stats (Andy Gospodarek) [832169 830226]
- [net] ixgbe: fix default return value for ixgbe_cache_ring_fdir (Andy Gospodarek) [832169 830226]
- [net] ixgbe: reverting setup redirection table for multiple packet buffers (Andy Gospodarek) [832169 830226]

[2.6.18-308.10.1.el5]
- [xen] x86_64: check address on trap handlers or guest callbacks (Paolo Bonzini) [813430 813431] {CVE-2012-0217}
- [xen] x86_64: Do not execute sysret with a non-canonical return address (Paolo Bonzini) [813430 813431] {CVE-2012-0217}
- [xen] x86: prevent hv boot on AMD CPUs with Erratum 121 (Laszlo Ersek) [824969 824970] {CVE-2012-2934}
- [scsi] qla2xxx: Use ha->pdev->revision in 4Gbps MSI-X check. (Chad Dupuis) [816373 800653]
- [fs] sunrpc: do array overrun check in svc_recv before page alloc (J. Bruce Fields) [820358 814626]
- [fs] knfsd: fix an NFSD bug with full size non-page-aligned reads (J. Bruce Fields) [820358 814626]
- [fs] sunrpc: fix oops due to overrunning server's page array (J. Bruce Fields) [820358 814626]
- [fs] epoll: clear the tfile_check_list on -ELOOP (Jason Baron) [829670 817131]
- [x86_64] sched: Avoid unnecessary overflow in sched_clock (Prarit Bhargava) [824654 818787]
- [net] sunrpc: Don't use list_for_each_entry_safe in rpc_wake_up (Steve Dickson) [817571 809937]
- [s390] qeth: add missing wake_up call (Hendrik Brueckner) [829059 790900]

[2.6.18-308.9.1.el5]
- [fs] jbd: clear b_modified before moving the jh to a different transaction (Josef Bacik) [827205 563247]