Security update for the Linux Kernel (important)

The Linux kernel was updated to fix various bugs and security issues.

Following security issues were fixed:

• CVE-2014-8173: A NULL pointer dereference flaw was found in the way the
  Linux kernels madvise MADV_WILLNEED functionality handled page table
  locking. A local, unprivileged user could have used this flaw to crash
  the system.

• CVE-2015-1593: A integer overflow reduced the effectiveness of the stack
  randomization on 64-bit systems.

• CVE-2014-7822: A flaw was found in the way the Linux kernels splice()
  system call validated its parameters. On certain file systems, a local,
  unprivileged user could have used this flaw to write past the maximum
  file size, and thus crash the system.

• CVE-2014-9419: The __switch_to function in arch/x86/kernel/process_64.c
  in the Linux kernel did not ensure that Thread Local Storage (TLS)
  descriptors are loaded before proceeding with other steps, which made it
  easier for local users to bypass the ASLR protection mechanism via a
  crafted application that reads a TLS base address.

• CVE-2014-8134: The paravirt_ops_setup function in arch/x86/kernel/kvm.c
  in the Linux kernel used an improper paravirt_enabled setting for KVM
  guest kernels, which made it easier for guest OS users to bypass the
  ASLR protection mechanism via a crafted application that reads a 16-bit
  value.

• CVE-2014-8160: net/netfilter/nf_conntrack_proto_generic.c in the Linux
  kernel generated incorrect conntrack entries during handling of certain
  iptables rule sets for the SCTP, DCCP, GRE, and UDP-Lite protocols,
  which allowed remote attackers to bypass intended access restrictions
  via packets with disallowed port numbers.

• CVE-2014-9529: Race condition in the key_gc_unused_keys function in
  security/keys/gc.c in the Linux kernel allowed local users to cause a
  denial of service (memory corruption or panic) or possibly have
  unspecified other impact via keyctl commands that trigger access to a
  key structure member during garbage collection of a key.

• CVE-2014-8559: The d_walk function in fs/dcache.c in the Linux kernel
  through did not properly maintain the semantics of rename_lock, which
  allowed local users to cause a denial of service (deadlock and system
  hang) via a crafted application.

• CVE-2014-9420: The rock_continue function in fs/isofs/rock.c in the
  Linux kernel did not restrict the number of Rock Ridge continuation
  entries, which allowed local users to cause a denial of service
  (infinite loop, and system crash or hang) via a crafted iso9660 image.

• CVE-2014-9584: The parse_rock_ridge_inode_internal function in
  fs/isofs/rock.c in the Linux kernel did not validate a length value in
  the Extensions Reference (ER) System Use Field, which allowed local
  users to obtain sensitive information from kernel memory via a crafted
  iso9660 image.

• CVE-2014-9585: The vdso_addr function in arch/x86/vdso/vma.c in the
  Linux kernel did not properly choose memory locations for the vDSO area,
  which made it easier for local users to bypass the ASLR protection
  mechanism by guessing a location at the end of a PMD.

Following bugs were fixed:

• HID: usbhid: enable always-poll quirk for Elan Touchscreen 0103
  (bnc#920901).

• HID: usbhid: enable always-poll quirk for Elan Touchscreen 016f
  (bnc#920901).

• HID: usbhid: enable always-poll quirk for Elan Touchscreen 009b
  (bnc#920901).

• HID: usbhid: add another mouse that needs QUIRK_ALWAYS_POLL (bnc#920901).

• HID: usbhid: fix PIXART optical mouse (bnc#920901).

• HID: usbhid: enable always-poll quirk for Elan Touchscreen (bnc#920901).

• HID: usbhid: add always-poll quirk (bnc#920901).

• storvsc: ring buffer failures may result in I/O freeze (bnc#914175).

• mm, vmscan: prevent kswapd livelock due to pfmemalloc-throttled process
  being killed (VM Functionality bnc#910150).

• Input: evdev - fix EVIOCG{type} ioctl (bnc#904899).

• mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by
  mount (bsc#907988).

• DocBook: Do not exceed argument list limit.

• DocBook: Make mandocs parallel-safe.

• mm: free compound page with correct order (bnc#913695).

• udf: Check component length before reading it.

• udf: Check path length when reading symlink.

• udf: Verify symlink size before loading it.

• udf: Verify i_size when loading inode.

• xfs: remote attribute overwrite causes transaction overrun.