kernel security and bug fix update

[2.6.32-220.7.1.el6]

• [netdrv] tg3: Fix single-vector MSI-X code (John Feeney) [787162 703555]
• [mm] export remove_from_page_cache() to modules (Jerome Marchand) [772687 751419]
• [block] cfq-iosched: fix cfq_cic_link() race confition (Vivek Goyal) [786022 765673]
• [fs] cifs: lower default wsize when unix extensions are not used (Jeff Layton) [789058 773705]
• [net] svcrpc: fix double-free on shutdown of nfsd after changing pool mode (J. Bruce Fields) [787580 753030]
• [net] svcrpc: avoid memory-corruption on pool shutdown (J. Bruce Fields) [787580 753030]
• [net] svcrpc: destroy server sockets all at once (J. Bruce Fields) [787580 753030]
• [net] svcrpc: simplify svc_close_all (J. Bruce Fields) [787580 753030]
• [net] svcrpc: fix list-corrupting race on nfsd shutdown (J. Bruce Fields) [787580 753030]
• [fs] xfs: Fix missing xfs_iunlock() on error recovery path in xfs_readlink() (Carlos Maiolino) [749161 694702] {CVE-2011-4077}
• [fs] xfs: Fix memory corruption in xfs_readlink (Carlos Maiolino) [749161 694702] {CVE-2011-4077}
• [x86] hpet: Disable per-cpu hpet timer if ARAT is supported (Prarit Bhargava) [772884 750201]
• [x86] Improve TSC calibration using a delayed workqueue (Prarit Bhargava) [772884 750201]
• [kernel] clocksource: Add clocksource_register_hz/khz interface (Prarit Bhargava) [772884 750201]
• [kernel] clocksource: Provide a generic mult/shift factor calculation (Prarit Bhargava) [772884 750201]
• [block] cfq-iosched: fix a kbuild regression (Vivek Goyal) [769208 705698]
• [block] cfq-iosched: rethink seeky detection for SSDs (Vivek Goyal) [769208 705698]
• [block] cfq-iosched: rework seeky detection (Vivek Goyal) [769208 705698]
• [block] cfq-iosched: don’t regard requests with long distance as close (Vivek Goyal) [769208 705698]
  [2.6.32-220.6.1.el6]
• [scsi] qla2xxx: Module parameter to control use of async or sync port login (Chad Dupuis) [788003 769007]
  [2.6.32-220.5.1.el6]
• [net] igmp: Avoid zero delay when receiving odd mixture of IGMP queries (Jiri Pirko) [772870 772871] {CVE-2012-0207}
• [fs] xfs: validate acl count (Eric Sandeen) [773282 773283] {CVE-2012-0038}
• [fs] Fix sendfile write-side file position (Steven Whitehouse) [771870 770023]
• [virt] kvm: x86: fix missing checks in syscall emulation (Marcelo Tosatti) [773390 773391] {CVE-2012-0045}
• [virt] kvm: x86: extend ‘struct x86_emulate_ops’ with ‘get_cpuid’ (Marcelo Tosatti) [773390 773391] {CVE-2012-0045}
• [fs] nfs: when attempting to open a directory, fall back on normal lookup (Jeff Layton) [771981 755380]
• [kernel] crypto: ghash - Avoid null pointer dereference if no key is set (Jiri Benc) [749481 749482] {CVE-2011-4081}
• [fs] jbd2: validate sb->s_first in journal_get_superblock() (Eryu Guan) [753344 693981] {CVE-2011-4132}
• [net] fix unsafe pointer access in sendmmsg (Jiri Benc) [761668 760798] {CVE-2011-4594}
• [scsi] increase qla2xxx firmware ready time-out (Mark Goodwin) [781971 731917]
• [perf] powerpc: Handle events that raise an exception without overflowing (Steve Best) [767917 755737] {CVE-2011-4611}
• [sched] x86: Avoid unnecessary overflow in sched_clock (Prarit Bhargava) [781974 765720]
• [virt] x86: Prevent starting PIT timers in the absence of irqchip support (Marcelo Tosatti) [769634 769550] {CVE-2011-4622}
• [virt] vmxnet3: revert hw features change (Neil Horman) [761536 759613]
• [netdrv] qlge: fix size of external list for TX address descriptors (Steve Best) [783226 772237]
• [netdrv] e1000e: Avoid wrong check on TX hang (Dean Nelson) [768916 751087]
• [virt] KVM: Device assignment permission checks (Alex Williamson) [756092 756093] {CVE-2011-4347}
• [virt] KVM: Remove ability to assign a device without iommu support (Alex Williamson) [756092 756093] {CVE-2011-4347}
• [virt] kvm: device-assignment: revert Disable the option to skip iommu setup (Alex Williamson) [756092 756093] {CVE-2011-4347}