Security update for the Linux Kernel (important)

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various
security and bugfixes.

Following feature was added to kernel-xen:

• A improved XEN blkfront module was added, which allows more I/O
  bandwidth. (FATE#320200) It is called xen-blkfront in PV, and
  xen-vbd-upstream in HVM mode.

The following security bugs were fixed:

• CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the
  Linux kernel allowed local users to bypass intended AF_UNIX socket
  permissions or cause a denial of service (panic) via crafted epoll_ctl
  calls (bnc#955654).
• CVE-2015-7515: An out of bounds memory access in the aiptek USB driver
  could be used by physical local attackers to crash the kernel
  (bnc#956708).
• CVE-2015-7550: The keyctl_read_key function in security/keys/keyctl.c in
  the Linux kernel did not properly use a semaphore, which allowed local
  users to cause a denial of service (NULL pointer dereference and system
  crash) or possibly have unspecified other impact via a crafted
  application that leverages a race condition between keyctl_revoke and
  keyctl_read calls (bnc#958951).
• CVE-2015-8539: The KEYS subsystem in the Linux kernel allowed local
  users to gain privileges or cause a denial of service (BUG) via crafted
  keyctl commands that negatively instantiate a key, related to
  security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and
  security/keys/user_defined.c (bnc#958463).
• CVE-2015-8543: The networking implementation in the Linux kernel did not
  validate protocol identifiers for certain protocol families, which
  allowed local users to cause a denial of service (NULL function pointer
  dereference and system crash) or possibly gain privileges by leveraging
  CLONE_NEWUSER support to execute a crafted SOCK_RAW application
  (bnc#958886).
• CVE-2015-8550: Compiler optimizations in the XEN PV backend drivers
  could have lead to double fetch vulnerabilities, causing denial of
  service
  or arbitrary code execution (depending on the configuration)
  (bsc#957988).
• CVE-2015-8551, CVE-2015-8552: xen/pciback: For
  XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled
  (bsc#957990).
• CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect functions in
  drivers/net/ppp/pptp.c in the Linux kernel did not verify an address
  length, which allowed local users to obtain sensitive information from
  kernel memory and bypass the KASLR protection mechanism via a crafted
  application (bnc#959190).
• CVE-2015-8575: The sco_sock_bind function in net/bluetooth/sco.c in the
  Linux kernel did not verify an address length, which allowed local users
  to obtain sensitive information from kernel memory and bypass the KASLR
  protection mechanism via a crafted application (bnc#959190 bnc#959399).
• CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not
  properly manage the relationship between a lock and a socket, which
  allowed local users to cause a denial of service (deadlock) via a
  crafted sctp_accept call (bnc#961509).
• CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in
  the Linux kernel allowed local users to cause a denial of service
  (infinite loop) via a writev system call that triggers a zero length for
  the first segment of an iov (bnc#963765).
• CVE-2015-8812: A use-after-free flaw was found in the CXGB3 kernel
  driver when the network was considered to be congested. This could be
  used by local attackers to cause machine crashes or potentially code
  execution (bsc#966437).
• CVE-2016-0723: Race condition in the tty_ioctl function in
  drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain
  sensitive information from kernel memory or cause a denial of service
  (use-after-free and system crash) by making a TIOCGETD ioctl call during
  processing of a TIOCSETD ioctl call (bnc#961500).
• CVE-2016-2069: Race conditions in TLB syncing was fixed which could leak
  to information leaks (bnc#963767).
• CVE-2016-2384: Removed a double free in the ALSA usb-audio driver in the
  umidi object which could lead to crashes (bsc#966693).
• CVE-2016-2543: Added a missing NULL check at remove_events ioctl in ALSA
  that could lead to crashes. (bsc#967972).
• CVE-2016-2544, CVE-2016-2545, CVE-2016-2546, CVE-2016-2547,
  CVE-2016-2548, CVE-2016-2549: Various race conditions in ALSAs timer
  handling were fixed. (bsc#967975, bsc#967974, bsc#967973, bsc#968011,
  bsc#968012, bsc#968013).

The following non-security bugs were fixed:

• alsa: hda - Add one more node in the EAPD supporting candidate list
  (bsc#963561).
• alsa: hda - Apply clock gate workaround to Skylake, too (bsc#966137).
• alsa: hda - Fix playback noise with 24/32 bit sample size on BXT
  (bsc#966137).
• alsa: hda - disable dynamic clock gating on Broxton before reset
  (bsc#966137).
• Add /etc/modprobe.d/50-xen.conf selecting Xen frontend driver
  implementation (bsc#957986, bsc#956084, bsc#961658).
• Fix handling of re-write-before-commit for mmapped NFS pages
  (bsc#964201).
• nfsv4: Recovery of recalled read delegations is broken (bsc#956514).
• nvme: default to 4k device page size (bsc#967042).
• pci: leave MEM and IO decoding disabled during 64-bit BAR sizing, too
  (bsc#951815).
• Refresh patches.xen/xen3-08-x86-ldt-make-modify_ldt-synchronous.patch
  (bsc#959705).
• Refresh patches.xen/xen-vscsi-large-requests (refine fix and also
  address bsc#966094).
• sunrpc: restore fair scheduling to priority queues (bsc#955308).
• usb: ftdi_sio: fix race condition in TIOCMIWAIT, and abort of TIOCMIWAIT
  when the device is removed (bnc#956375).
• usb: ftdi_sio: fix status line change handling for TIOCMIWAIT and
  TIOCGICOUNT (bnc#956375).
• usb: ftdi_sio: fix tiocmget and tiocmset return values (bnc#956375).
• usb: ftdi_sio: fix tiocmget indentation (bnc#956375).
• usb: ftdi_sio: optimise chars_in_buffer (bnc#956375).
• usb: ftdi_sio: refactor modem-control status retrieval (bnc#956375).
• usb: ftdi_sio: remove unnecessary memset (bnc#956375).
• usb: ftdi_sio: use ftdi_get_modem_status in chars_in_buffer (bnc#956375).
• usb: ftdi_sio: use generic chars_in_buffer (bnc#956375).
• usb: pl2303: clean up line-status handling (bnc#959649).
• usb: pl2303: only wake up MSR queue on changes (bnc#959649).
• usb: pl2303: remove bogus delta_msr_wait wake up (bnc#959649).
• usb: serial: export usb_serial_generic_chars_in_buffer (bnc#956375).
• Update
  patches.fixes/mm-exclude-reserved-pages-from-dirtyable-memory-fix.patch
  (bnc#940017, bnc#949298, bnc#947128).
• xen: Update Xen config files (enable upstream block frontend).
• ec2: Update kabi files and start tracking ec2
• xen: consolidate and simplify struct xenbus_driver instantiation
  (bsc#961658 fate#320200).
• blktap: also call blkif_disconnect() when frontend switched to closed
  (bsc#952976).
• blktap: refine mm tracking (bsc#952976).
• block: Always check queue limits for cloned requests (bsc#933782).
• block: xen-blkfront: Fix possible NULL ptr dereference (bsc#961658
  fate#320200).
• bnx2x: Add new device ids under the Qlogic vendor (bsc#964818).
• bnx2x: Alloc 4k fragment for each rx ring buffer element (bsc#953369).
• bnx2x: fix DMA API usage (bsc#953369).
• driver core: Add BUS_NOTIFY_REMOVED_DEVICE event (bnc#962965).
• driver: xen-blkfront: move talk_to_blkback to a more suitable place
  (bsc#961658 fate#320200).
• drivers: xen-blkfront: only talk_to_blkback() when in
  XenbusStateInitialising (bsc#961658 fate#320200).
• drm/i915: Change semantics of hw_contexts_disabled (bsc#963276).
• drm/i915: Evict CS TLBs between batches (bsc#758040).
• drm/i915: Fix SRC_COPY width on 830/845g (bsc#758040).
• e1000e: Do not read ICR in Other interrupt (bsc#924919).
• e1000e: Do not write lsc to ics in msi-x mode (bsc#924919).
• e1000e: Fix msi-x interrupt automask (bsc#924919).
• e1000e: Remove unreachable code (bsc#924919).
• ext3: NULL dereference in ext3_evict_inode() (bsc#942082).
• ext3: fix data=journal fast mount/umount hang (bsc#942082).
• firmware: Create directories for external firmware (bsc#959312).
• firmware: Simplify directory creation (bsc#959312).
• ftdi_sio: private backport of TIOCMIWAIT (bnc#956375).
• iommu/vt-d: Do not change dma domain on dma-mask change (bsc#955925).
• jbd: Fix unreclaimed pages after truncate in data=journal mode
  (bsc#961516).
• kabi/severities: Add exception for bnx2x_schedule_sp_rtnl() There is no
  external, 3rd party modules use the symbol and the
  bnx2x_schedule_sp_rtnl symbol is only used in the bnx2x driver.
  (bsc#953369)
• kbuild: create directory for dir/file.o (bsc#959312).
• llist/xen-blkfront: implement safe version of llist_for_each_entry
  (bsc#961658 fate#320200).
• lpfc: Fix null ndlp dereference in target_reset_handler (bsc#951392).
• mm-memcg-print-statistics-from-live-counters-fix (bnc#969307).
• nvme: Clear BIO_SEG_VALID flag in nvme_bio_split() (bsc#954992).
• pci: Update VPD size with correct length (bsc#958906).
• pl2303: fix TIOCMIWAIT (bnc#959649).
• pl2303: introduce private disconnect method (bnc#959649).
• qeth: initialize net_device with carrier off (bnc#958000, LTC#136514).
• s390/cio: collect format 1 channel-path description data (bnc#958000,
  LTC#136434).
• s390/cio: ensure consistent measurement state (bnc#958000, LTC#136434).
• s390/cio: fix measurement characteristics memleak (bnc#958000,
  LTC#136434).
• s390/cio: update measurement characteristics (bnc#958000, LTC#136434).
• s390/dasd: fix failfast for disconnected devices (bnc#958000,
  LTC#135138).
• s390/sclp: Determine HSA size dynamically for zfcpdump (bnc#958000,
  LTC#136143).
• s390/sclp: Move declarations for sclp_sdias into separate header file
  (bnc#958000, LTC#136143).
• scsi_dh_rdac: always retry MODE SELECT on command lock violation
  (bsc#956949).
• supported.conf: Add xen-blkfront.
• tg3: 5715 does not link up when autoneg off (bsc#904035).
• usb: serial: ftdi_sio: Add missing chars_in_buffer function (bnc#956375).
• vmxnet3: fix building without CONFIG_PCI_MSI (bsc#958912).
• vmxnet3: fix netpoll race condition (bsc#958912).
• xen, blkfront: factor out flush-related checks from do_blkif_request()
  (bsc#961658 fate#320200).
• xen-blkfront: Handle discard requests (bsc#961658 fate#320200).
• xen-blkfront: If no barrier or flush is supported, use invalid operation
  (bsc#961658 fate#320200).
• xen-blkfront: Introduce a ‘max’ module parameter to alter the amount of
  indirect segments (bsc#961658 fate#320200).
• xen-blkfront: Silence pfn maybe-uninitialized warning (bsc#961658
  fate#320200).
• xen-blkfront: allow building in our Xen environment (bsc#961658
  fate#320200).
• xen-blkfront: check for null drvdata in blkback_changed
  (XenbusStateClosing) (bsc#961658 fate#320200).
• xen-blkfront: do not add indirect pages to list when !feature_persistent
  (bsc#961658 fate#320200).
• xen-blkfront: drop the use of llist_for_each_entry_safe (bsc#961658
  fate#320200).
• xen-blkfront: fix a deadlock while handling discard response (bsc#961658
  fate#320200).
• xen-blkfront: fix accounting of reqs when migrating (bsc#961658
  fate#320200).
• xen-blkfront: free allocated page (bsc#961658 fate#320200).
• xen-blkfront: handle backend CLOSED without CLOSING (bsc#961658
  fate#320200).
• xen-blkfront: handle bvecs with partial data (bsc#961658 fate#320200).
• xen-blkfront: improve aproximation of required grants per request
  (bsc#961658 fate#320200).
• xen-blkfront: make blkif_io_lock spinlock per-device (bsc#961658
  fate#320200).
• xen-blkfront: plug device number leak in xlblk_init() error path
  (bsc#961658 fate#320200).
• xen-blkfront: pre-allocate pages for requests (bsc#961658 fate#320200).
• xen-blkfront: remove frame list from blk_shadow (bsc#961658 fate#320200).
• xen-blkfront: remove type check from blkfront_setup_discard (bsc#961658
  fate#320200).
• xen-blkfront: restore the non-persistent data path (bsc#961658
  fate#320200).
• xen-blkfront: revoke foreign access for grants not mapped by the backend
  (bsc#961658 fate#320200).
• xen-blkfront: set blk_queue_max_hw_sectors correctly (bsc#961658
  fate#320200).
• xen-blkfront: switch from llist to list (bsc#961658 fate#320200).
• xen-blkfront: use a different scatterlist for each request (bsc#961658
  fate#320200).
• xen-block: implement indirect descriptors (bsc#961658 fate#320200).
• xen/blk[front|back]: Enhance discard support with secure erasing support
  (bsc#961658 fate#320200).
• xen/blk[front|back]: Squash blkif_request_rw and blkif_request_discard
  together (bsc#961658 fate#320200).
• xen/blkback: Persistent grant maps for xen blk drivers (bsc#961658
  fate#320200).
• xen/blkback: persistent-grants fixes (bsc#961658 fate#320200).
• xen/blkfront: Fix crash if backend does not follow the right states
  (bsc#961658 fate#320200).
• xen/blkfront: do not put bdev right after getting it (bsc#961658
  fate#320200).
• xen/blkfront: improve protection against issuing unsupported REQ_FUA
  (bsc#961658 fate#320200).
• xen/blkfront: remove redundant flush_op (bsc#961658 fate#320200).
• xen/panic/x86: Allow cpus to save registers even if they (bnc#940946).
• xen/panic/x86: Fix re-entrance problem due to panic on (bnc#937444).
• xen/pvhvm: If xen_platform_pci=0 is set do not blow up (v4) (bsc#961658
  fate#320200).
• xen/x86/mm: Add barriers and document switch_mm()-vs-flush
  synchronization (bnc#963767).
• xen: x86: mm: drop TLB flush from ptep_set_access_flags (bsc#948330).
• xen: x86: mm: only do a local tlb flush in ptep_set_access_flags()
  (bsc#948330).
• xfs: Skip dirty pages in ->releasepage (bnc#912738, bnc#915183).
• zfcp: fix fc_host port_type with NPIV (bnc#958000, LTC#132479).