Security update for xen (important)

This update for xen fixes the following issues:

These security issues were fixed:

• CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen
  allowed local 32-bit PV guest OS administrators to gain host OS
  privileges via vectors related to L3 recursive pagetables (bsc#995785)
• CVE-2016-7093: Xen allowed local HVM guest OS administrators to
  overwrite hypervisor memory and consequently gain host OS privileges by
  leveraging mishandling of instruction pointer truncation during
  emulation (bsc#995789)
• CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS
  administrators on guests running with shadow paging to cause a denial of
  service via a pagetable update (bsc#995792)
• CVE-2016-6836: VMWARE VMXNET3 NIC device support was leaging information
  leakage. A privileged user inside guest could have used this to leak
  host memory bytes to a guest (boo#994761)
• CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3
  device driver. A privileged user inside guest could have used this flaw
  to crash the Qemu instance resulting in DoS (bsc#994772)
• CVE-2016-6833: Use-after-free issue in the VMWARE VMXNET3 NIC device
  support. A privileged user inside guest could have used this issue to
  crash the Qemu instance resulting in DoS (boo#994775)
• CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support,
  causing an OOB read access (bsc#994625)
• CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE
  VMXNET3 NIC device support allowed privileged user inside guest to crash
  the Qemu instance resulting in DoS (bsc#994421)
• CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed
  local 32-bit PV guest OS administrators to gain host OS privileges by
  leveraging fast-paths for updating pagetable entries (bsc#988675)
• CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention
  (SMAP) whitelisting in 32-bit exception and event delivery, which
  allowed local 32-bit PV guest OS kernels to cause a denial of service
  (hypervisor and VM crash) by triggering a safety check (bsc#988676)
• CVE-2016-5403: The virtqueue_pop function in hw/virtio/virtio.c in QEMU
  allowed local guest OS administrators to cause a denial of service
  (memory consumption and QEMU process crash) by submitting requests
  without waiting for completion (boo#990923)
• CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with
  ESP/NCR53C9x controller emulation support, allowed local guest OS
  administrators to cause a denial of service (out-of-bounds write and
  QEMU process crash) or execute arbitrary code on the host via vectors
  involving DMA read into ESP command buffer (bsc#990843)
• CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed
  local 32-bit PV guest OS administrators to gain host OS privileges by
  leveraging fast-paths for updating pagetable entries (bsc#988675)
• CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention
  (SMAP) whitelisting in 32-bit exception and event delivery, which
  allowed local 32-bit PV guest OS kernels to cause a denial of service
  (hypervisor and VM crash) by triggering a safety check (bsc#988676)
• CVE-2016-5337: The megasas_ctrl_get_info function in hw/scsi/megasas.c
  in QEMU allowed local guest OS administrators to obtain sensitive host
  memory information via vectors related to reading device control
  information (bsc#983973)
• CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions in
  hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a
  denial of service (QEMU process crash) or execute arbitrary code on the
  QEMU host via vectors related to the information transfer buffer
  (bsc#983984)
• CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in QEMU allowed
  local guest OS administrators to cause a denial of service
  (out-of-bounds write and QEMU process crash) via vectors related to
  reading from the information transfer buffer in non-DMA mode (bsc#982960)
• CVE-2016-4453: The vmsvga_fifo_run function in hw/display/vmware_vga.c
  in QEMU allowed local guest OS administrators to cause a denial of
  service (infinite loop and QEMU process crash) via a VGA command
  (bsc#982225)
• CVE-2016-4454: The vmsvga_fifo_read_raw function in
  hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to
  obtain sensitive host memory information or cause a denial of service
  (QEMU process crash) by changing FIFO registers and issuing a VGA
  command, which triggers an out-of-bounds read (bsc#982224)
• CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl
  function in block/iscsi.c in QEMU allowed local guest OS users to cause
  a denial of service (QEMU process crash) or possibly execute arbitrary
  code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286)
• CVE-2016-5105: The megasas_dcmd_cfg_read function in hw/scsi/megasas.c
  in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation
  support, used an uninitialized variable, which allowed local guest
  administrators to read host memory via vectors involving a MegaRAID
  Firmware Interface (MFI) command (bsc#982024)
• CVE-2016-5106: The megasas_dcmd_set_properties function in
  hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus
  Adapter emulation support, allowed local guest administrators to cause a
  denial of service (out-of-bounds write access) via vectors involving a
  MegaRAID Firmware Interface (MFI) command (bsc#982025)
• CVE-2016-5107: The megasas_lookup_frame function in QEMU, when built
  with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed
  local guest OS administrators to cause a denial of service
  (out-of-bounds read and crash) via unspecified vectors (bsc#982026)
• CVE-2016-4963: The libxl device-handling allowed local guest OS users
  with access to the driver domain to cause a denial of service
  (management tool confusion) by manipulating information in the backend
  directories in xenstore (bsc#979670)
• CVE-2016-4962: The libxl device-handling allowed local OS guest
  administrators to cause a denial of service (resource consumption or
  management facility confusion) or gain host OS privileges by
  manipulating information in guest controlled areas of xenstore
  (bsc#979620)
• CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data
  routines (bsc#981276)
• CVE-2016-3710: The VGA module improperly performed bounds checking on
  banked access to video memory, which allowed local guest OS
  administrators to execute arbitrary code on the host by changing access
  modes after setting the bank register, aka the "Dark Portal" issue
  (bsc#978164)
• CVE-2014-3672: The qemu implementation in libvirt Xen allowed local
  guest OS users to cause a denial of service (host disk consumption) by
  writing to stdout or stderr (bsc#981264)
• CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller
  (FSC) support did not properly check DMA length, which allowed local
  guest OS administrators to cause a denial of service (out-of-bounds
  write and QEMU process crash) via unspecified vectors, involving an SCSI
  command (bsc#980724)
• CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI
  Controller (FSC) support did not properly check command buffer length,
  which allowed local guest OS administrators to cause a denial of service
  (out-of-bounds write and QEMU process crash) or potentially execute
  arbitrary code on the host via unspecified vectors (bsc#980716)
• CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed
  local guest OS users to cause a denial of service (host crash) or
  possibly gain privileges by shadowing a superpage mapping (bsc#974038)
• CVE-2016-3158: The xrstor function did not properly handle writes to the
  hardware FSW.ES bit when running on AMD64 processors, which allowed
  local guest OS users to obtain sensitive register content information
  from another guest by leveraging pending exception and mask bits
  (bsc#973188)
• CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not
  properly handle writes to the hardware FSW.ES bit when running on AMD64
  processors, which allowed local guest OS users to obtain sensitive
  register content information from another guest by leveraging pending
  exception and mask bits (bsc#973188)
• CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c
  allowed local guest OS administrators to cause a denial of service
  (infinite loop and CPU consumption) via a circular split isochronous
  transfer descriptor (siTD) list (bsc#976111)
• CVE-2016-4020: The patch_instruction function did not initialize the
  imm32 variable, which allowed local guest OS administrators to obtain
  sensitive information from host stack memory by accessing the Task
  Priority Register (TPR) (bsc#975907)
• CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function,
  when the Stellaris ethernet controller is configured to accept large
  packets, allowed remote attackers to cause a denial of service (QEMU
  crash) via a large packet (bsc#975130)
• CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the
  guest NIC is configured to accept large packets, allowed remote
  attackers to cause a denial of service (memory corruption and QEMU
  crash) or possibly execute arbitrary code via a packet larger than 1514
  bytes (bsc#975138)
• CVE-2016-4480: The guest_walk_tables function in
  arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size
  (PS) page table entry bit at the L4 and L3 page table levels, which
  might have allowed local guest OS users to gain privileges via a crafted
  mapping of memory (bsc#978295)

These non-security issues were fixed:

• boo#991934: xen hypervisor crash in csched_acct
• boo#992224: During boot of Xen Hypervisor, Failed to get contiguous
  memory for DMA from Xen
• boo#955104: Virsh reports error "one or more references were leaked
  after disconnect from hypervisor" when "virsh save" failed due to "no
  response from client after 6 keepalive messages"
• boo#959552: Migration of HVM guest leads into libvirt segmentation fault
• boo#993665: Migration of xen guests finishes in: One or more references
  were leaked after disconnect from the hypervisor
• boo#959330: Guest migrations using virsh results in error "Internal
  error: received hangup / error event on socket"
• boo#990500: VM virsh migration fails with keepalive error:
  ":virKeepAliveTimerInternal:143 : No response from client"
• boo#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream
  unplug protocol
• boo#953518: xen_platform: unplug also SCSI disks in qemu-xen
• boo#971949: Support (by ignoring) xl migrate --live. xl migrations are
  always live
• boo#970135: New virtualization project clock test randomly fails on Xen
• boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79)
• boo#985503: vif-route broken
• boo#961100: Migrate a fv guest from sles12 to sles12sp1 fails remove
  patch because it can not fix the bug
• boo#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed
  on sles11sp4 xen host.
• boo#986586: Out of memory (oom) during boot on "modprobe xenblk" (non
  xen kernel) init.50-hvm-xen_conf
• boo#900418: Dump cannot be performed on SLES12 XEN
• boo#953339, boo#953362, boo#953518, boo#984981: Implement SUSE specific
  unplug protocol for emulated PCI devices in PVonHVM guests to
  qemu-xen-upstream
• boo#954872: script block-dmmd not working as expected - libxl: error:
  libxl_dm.c (Additional fixes) block-dmmd
• boo#982695: xen-4.5.2 qemu fails to boot HVM guest from xvda
• boo#958848: HVM guest crash at /usr/src/packages/BUILD/
  xen-4.4.2-testing/obj/default/balloon/balloon.c:407
• boo#949889: Fail to install 32-bit paravirt VM under SLES12SP1Beta3 XEN
• boo#954872: script block-dmmd not working as expected - libxl: error:
  libxl_dm.c (another modification) block-dmmd
• boo#961600: Poor performance when Xen HVM domU configured with max
  memory greater than current memory
• boo#963161: Windows VM getting stuck during load while a VF is assigned
  to it after upgrading to latest maintenance updates
• boo#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)
• boo#961100: Migrate a fv guest from sles12 to sles12sp1 on xen fails for
  "Domain is not running on destination host".
  qemu-ignore-kvm-tpr-opt-on-migration.patch
• boo#973631: AWS EC2 kdump issue
• boo#964427: Discarding device blocks: failed - Input/output error