Security update for the Linux Kernel (important)

The SUSE Linux Enterprise 12 SP1 kernel was updated to 3.12.74 to receive
various security and bugfixes.

Notable new/improved features:

• Improved support for Hyper-V
• Support for the tcp_westwood TCP scheduling algorithm

The following security bugs were fixed:

• CVE-2017-8106: The handle_invept function in arch/x86/kvm/vmx.c in the
  Linux kernel allowed privileged KVM guest OS users to cause a denial of
  service (NULL pointer dereference and host OS crash) via a
  single-context INVEPT instruction with a NULL EPT pointer (bsc#1035877).
• CVE-2017-6951: The keyring_search_aux function in
  security/keys/keyring.c in the Linux kernel allowed local users to cause
  a denial of service (NULL pointer dereference and OOPS) via a
  request_key system call for the "dead" type. (bsc#1029850).
• CVE-2017-2647: The KEYS subsystem in the Linux kernel allowed local
  users to gain privileges or cause a denial of service (NULL pointer
  dereference and system crash) via vectors involving a NULL value for a
  certain match field, related to the keyring_search_iterator function in
  keyring.c. (bsc#1030593)
• CVE-2016-9604: This fixes handling of keyrings starting with ‘.’ in
  KEYCTL_JOIN_SESSION_KEYRING, which could have allowed local users to
  manipulate privileged keyrings (bsc#1035576)
• CVE-2017-7616: Incorrect error handling in the set_mempolicy and mbind
  compat syscalls in mm/mempolicy.c in the Linux kernel allowed local
  users to obtain sensitive information from uninitialized stack data by
  triggering failure of a certain bitmap operation. (bnc#1033336).
• CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd subsystem in the Linux
  kernel allowed remote attackers to cause a denial of service (system
  crash) via a long RPC reply, related to net/sunrpc/svc.c,
  fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c. (bsc#1034670).
• CVE-2017-7308: The packet_set_ring function in net/packet/af_packet.c in
  the Linux kernel did not properly validate certain block-size data,
  which allowed local users to cause a denial of service (overflow) or
  possibly have unspecified other impact via crafted system calls
  (bnc#1031579)
• CVE-2017-2671: The ping_unhash function in net/ipv4/ping.c in the Linux
  kernel was too late in obtaining a certain lock and consequently could
  not ensure that disconnect function calls are safe, which allowed local
  users to cause a denial of service (panic) by leveraging access to the
  protocol value of IPPROTO_ICMP in a socket system call (bnc#1031003)
• CVE-2017-7294: The vmw_surface_define_ioctl function in
  drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel did not
  validate addition of certain levels data, which allowed local users to
  trigger an integer overflow and out-of-bounds write, and cause a denial
  of service (system hang or crash) or possibly gain privileges, via a
  crafted ioctl call for a /dev/dri/renderD* device (bnc#1031440)
• CVE-2017-7261: The vmw_surface_define_ioctl function in
  drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel did not
  check for a zero value of certain levels data, which allowed local users
  to cause a denial of service (ZERO_SIZE_PTR dereference, and GPF and
  possibly panic) via a crafted ioctl call for a /dev/dri/renderD* device
  (bnc#1031052)
• CVE-2017-7187: The sg_ioctl function in drivers/scsi/sg.c in the Linux
  kernel allowed local users to cause a denial of service (stack-based
  buffer overflow) or possibly have unspecified other impact via a large
  command size in an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds
  write access in the sg_write function (bnc#1030213)
• CVE-2016-9588: arch/x86/kvm/vmx.c in the Linux kernel mismanaged the #BP
  and #OF exceptions, which allowed guest OS users to cause a denial of
  service (guest OS crash) by declining to handle an exception thrown by
  an L2 guest (bsc#1015703).
• CVE-2017-5669: The do_shmat function in ipc/shm.c in the Linux kernel
  did not restrict the address calculated by a certain rounding operation,
  which allowed local users to map page zero, and consequently bypass a
  protection mechanism that exists for the mmap system call, by making
  crafted shmget and shmat system calls in a privileged context
  (bnc#1026914).
• CVE-2016-10200: Race condition in the L2TPv3 IP Encapsulation feature in
  the Linux kernel allowed local users to gain privileges or cause a
  denial of service (use-after-free) by making multiple bind system calls
  without properly ascertaining whether a socket has the SOCK_ZAPPED
  status, related to net/l2tp/l2tp_ip.c and net/l2tp/l2tp_ip6.c
  (bnc#1028415)
• CVE-2016-10208: The ext4_fill_super function in fs/ext4/super.c in the
  Linux kernel did not properly validate meta block groups, which allowed
  physically proximate attackers to cause a denial of service
  (out-of-bounds read and system crash) via a crafted ext4 image
  (bnc#1023377).
• CVE-2017-5897: The ip6gre_err function in net/ipv6/ip6_gre.c in the
  Linux kernel allowed remote attackers to have unspecified impact via
  vectors involving GRE flags in an IPv6 packet, which trigger an
  out-of-bounds access (bsc#1023762).
• CVE-2017-5986: A race condition in the sctp_wait_for_sndbuf function in
  net/sctp/socket.c in the Linux kernel allowed local users to cause a
  denial of service (assertion failure and panic) via a multithreaded
  application that peels off an association in a certain buffer-full state
  (bsc#1025235).
• CVE-2017-6074: The dccp_rcv_state_process function in net/dccp/input.c
  in the Linux kernel mishandled DCCP_PKT_REQUEST packet data structures
  in the LISTEN state, which allowed local users to obtain root privileges
  or cause a denial of service (double free) via an application that made
  an IPV6_RECVPKTINFO setsockopt system call (bnc#1026024)
• CVE-2016-9191: The cgroup offline implementation in the Linux kernel
  mishandled certain drain operations, which allowed local users to cause
  a denial of service (system hang) by leveraging access to a container
  environment for executing a crafted application (bnc#1008842)
• CVE-2017-6348: The hashbin_delete function in net/irda/irqueue.c in the
  Linux kernel improperly managed lock dropping, which allowed local users
  to cause a denial of service (deadlock) via crafted operations on IrDA
  devices (bnc#1027178).
• CVE-2016-10044: The aio_mount function in fs/aio.c in the Linux kernel
  did not properly restrict execute access, which made it easier for local
  users to bypass intended SELinux W^X policy restrictions, and
  consequently gain privileges, via an io_setup system call (bnc#1023992).
• CVE-2016-3070: The trace_writeback_dirty_page implementation in
  include/trace/events/writeback.h in the Linux kernel improperly
  interacts with mm/migrate.c, which allowed local users to cause a denial
  of service (NULL pointer dereference and system crash) or possibly have
  unspecified other impact by triggering a certain page move (bnc#979215).
• CVE-2016-5243: The tipc_nl_compat_link_dump function in
  net/tipc/netlink_compat.c in the Linux kernel did not properly copy a
  certain string, which allowed local users to obtain sensitive
  information from kernel stack memory by reading a Netlink message
  (bnc#983212).
• CVE-2017-6345: The LLC subsystem in the Linux kernel did not ensure that
  a certain destructor exists in required circumstances, which allowed
  local users to cause a denial of service (BUG_ON) or possibly have
  unspecified other impact via crafted system calls (bnc#1027190)
• CVE-2017-6346: Race condition in net/packet/af_packet.c in the Linux
  kernel allowed local users to cause a denial of service (use-after-free)
  or possibly have unspecified other impact via a multithreaded
  application that made PACKET_FANOUT setsockopt system calls (bnc#1027189)
• CVE-2017-6353: net/sctp/socket.c in the Linux kernel did not properly
  restrict association peel-off operations during certain wait states,
  which allowed local users to cause a denial of service (invalid unlock
  and double free) via a multithreaded application. NOTE: this
  vulnerability exists because of an incorrect fix for CVE-2017-5986
  (bnc#1027066)
• CVE-2017-5986: Race condition in the sctp_wait_for_sndbuf function in
  net/sctp/socket.c in the Linux kernel allowed local users to cause a
  denial of service (assertion failure and panic) via a multithreaded
  application that peels off an association in a certain buffer-full state
  (bsc#1025235).
• CVE-2017-6214: The tcp_splice_read function in net/ipv4/tcp.c in the
  Linux kernel allowed remote attackers to cause a denial of service
  (infinite loop and soft lockup) via vectors involving a TCP packet with
  the URG flag (bnc#1026722)
• CVE-2016-2117: The atl2_probe function in
  drivers/net/ethernet/atheros/atlx/atl2.c in the Linux kernel incorrectly
  enables scatter/gather I/O, which allowed remote attackers to obtain
  sensitive information from kernel memory by reading packet data
  (bnc#968697)
• CVE-2015-1350: The VFS subsystem in the Linux kernel provided an
  incomplete set of requirements for setattr operations that
  underspecifies removing extended privilege attributes, which allowed
  local users to cause a denial of service (capability stripping) via a
  failed invocation of a system call, as demonstrated by using chown to
  remove a capability from the ping or Wireshark dumpcap program
  (bsc#914939).
• CVE-2016-7117: Use-after-free vulnerability in the __sys_recvmmsg
  function in net/socket.c in the Linux kernel allowed remote attackers to
  execute arbitrary code via vectors involving a recvmmsg system call that
  is mishandled during error processing (bsc#1003077).

The following non-security bugs were fixed:

• ACPI / APEI: Fix NMI notification handling (bsc#917630).
• arch: Mass conversion of smp_mb__*() (bsc#1020795).
• asm-generic: add __smp_xxx wrappers (bsc#1020795).
• block: remove struct request buffer member (bsc#1020795).
• block: submit_bio_wait() conversions (bsc#1020795).
• bonding: Advertize vxlan offload features when supported (bsc#1009682).
• bonding: handle more gso types (bsc#1009682).
• bonding: use the correct ether type for alb (bsc#1028595).
• btrfs: allow unlink to exceed subvolume quota (bsc#1015821).
• btrfs: Change qgroup_meta_rsv to 64bit (bsc#1015821).
• btrfs: fix btrfs_compat_ioctl failures on non-compat ioctls
  (bsc#1018100).
• btrfs: make file clone aware of fatal signals (bsc#1015787).
• btrfs: qgroups: Retry after commit on getting EDQUOT (bsc#1015821).
• cancel the setfilesize transation when io error happen (bsc#1028648).
• cgroup: remove stray references to css_id (bsc#1020795).
• cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state
  (bnc#1023164).
• dm: add era target (bsc#1020795).
• dm: allow remove to be deferred (bsc#1020795).
• dm bitset: only flush the current word if it has been dirtied
  (bsc#1020795).
• dm btree: add dm_btree_find_lowest_key (bsc#1020795).
• dm cache: actually resize cache (bsc#1020795).
• dm cache: add block sizes and total cache blocks to status output
  (bsc#1020795).
• dm cache: add cache block invalidation support (bsc#1020795).
• dm cache: add passthrough mode (bsc#1020795).
• dm cache: add policy name to status output (bsc#1020795).
• dm cache: add remove_cblock method to policy interface (bsc#1020795).
• dm cache: be much more aggressive about promoting writes to discarded
  blocks (bsc#1020795).
• dm cache: cache shrinking support (bsc#1020795).
• dm cache: do not add migration to completed list before unhooking bio
  (bsc#1020795).
• dm cache: fix a lock-inversion (bsc#1020795).
• dm cache: fix truncation bug when mapping I/O to more than 2TB fast
  device (bsc#1020795).
• dm cache: fix writethrough mode quiescing in cache_map (bsc#1020795).
• dm cache: improve efficiency of quiescing flag management (bsc#1020795).
• dm cache: io destined for the cache device can now serve as tick bios
  (bsc#1020795).
• dm cache: log error message if dm_kcopyd_copy() fails (bsc#1020795).
• dm cache metadata: check the metadata version when reading the
  superblock (bsc#1020795).
• dm cache metadata: return bool from __superblock_all_zeroes
  (bsc#1020795).
• dm cache: move hook_info into common portion of per_bio_data structure
  (bsc#1020795).
• dm cache: optimize commit_if_needed (bsc#1020795).
• dm cache policy mq: a few small fixes (bsc#1020795).
• dm cache policy mq: fix promotions to occur as expected (bsc#1020795).
• dm cache policy mq: implement writeback_work() and
  mq_{set,clear}_dirty() (bsc#1020795).
• dm cache policy mq: introduce three promotion threshold tunables
  (bsc#1020795).
• dm cache policy mq: protect residency method with existing mutex
  (bsc#1020795).
• dm cache policy mq: reduce memory requirements (bsc#1020795).
• dm cache policy mq: use list_del_init instead of list_del +
  INIT_LIST_HEAD (bsc#1020795).
• dm cache policy: remove return from void policy_remove_mapping
  (bsc#1020795).
• dm cache: promotion optimisation for writes (bsc#1020795).
• dm cache: resolve small nits and improve Documentation (bsc#1020795).
• dm cache: return -EINVAL if the user specifies unknown cache policy
  (bsc#1020795).
• dm cache: use cell_defer() boolean argument consistently (bsc#1020795).
• dm: change sector_count member in clone_info from sector_t to unsigned
  (bsc#1020795).
• dm crypt: add TCW IV mode for old CBC TCRYPT containers (bsc#1020795).
• dm crypt: properly handle extra key string in initialization
  (bsc#1020795).
• dm delay: use per-bio data instead of a mempool and slab cache
  (bsc#1020795).
• dm: fix Kconfig indentation (bsc#1020795).
• dm: fix Kconfig menu indentation (bsc#1020795).
• dm: make dm_table_alloc_md_mempools static (bsc#1020795).
• dm mpath: do not call pg_init when it is already running (bsc#1020795).
• dm mpath: fix lock order inconsistency in multipath_ioctl (bsc#1020795).
• dm mpath: print more useful warnings in multipath_message()
  (bsc#1020795).
• dm mpath: push back requests instead of queueing (bsc#1020795).
• dm mpath: really fix lockdep warning (bsc#1020795).
• dm mpath: reduce memory pressure when requeuing (bsc#1020795).
• dm mpath: remove extra nesting in map function (bsc#1020795).
• dm mpath: remove map_io() (bsc#1020795).
• dm mpath: remove process_queued_ios() (bsc#1020795).
• dm mpath: requeue I/O during pg_init (bsc#1020795).
• dm persistent data: cleanup dm-thin specific references in text
  (bsc#1020795).
• dm snapshot: call destroy_work_on_stack() to pair with
  INIT_WORK_ONSTACK() (bsc#1020795).
• dm snapshot: fix metadata corruption (bsc#1020795).
• dm snapshot: prepare for switch to using dm-bufio (bsc#1020795).
• dm snapshot: use dm-bufio (bsc#1020795).
• dm snapshot: use dm-bufio prefetch (bsc#1020795).
• dm snapshot: use GFP_KERNEL when initializing exceptions (bsc#1020795).
• dm space map disk: optimise sm_disk_dec_block (bsc#1020795).
• dm space map metadata: limit errors in sm_metadata_new_block
  (bsc#1020795).
• dm: stop using bi_private (bsc#1020795).
• dm table: add dm_table_run_md_queue_async (bsc#1020795).
• dm table: print error on preresume failure (bsc#1020795).
• dm table: remove unused buggy code that extends the targets array
  (bsc#1020795).
• dm thin: add error_if_no_space feature (bsc#1020795).
• dm thin: add mappings to end of prepared_* lists (bsc#1020795).
• dm thin: add ‘no_space_timeout’ dm-thin-pool module param (bsc#1020795).
• dm thin: add timeout to stop out-of-data-space mode holding IO forever
  (bsc#1020795).
• dm thin: allow metadata commit if pool is in PM_OUT_OF_DATA_SPACE mode
  (bsc#1020795).
• dm thin: allow metadata space larger than supported to go unused
  (bsc#1020795).
• dm thin: cleanup and improve no space handling (bsc#1020795).
• dm thin: eliminate the no_free_space flag (bsc#1020795).
• dm thin: ensure user takes action to validate data and metadata
  consistency (bsc#1020795).
• dm thin: factor out check_low_water_mark and use bools (bsc#1020795).
• dm thin: fix deadlock in __requeue_bio_list (bsc#1020795).
• dm thin: fix noflush suspend IO queueing (bsc#1020795).
• dm thin: fix out of data space handling (bsc#1020795).
• dm thin: fix pool feature parsing (bsc#1020795).
• dm thin: fix rcu_read_lock being held in code that can sleep
  (bsc#1020795).
• dm thin: handle metadata failures more consistently (bsc#1020795).
• dm thin: irqsave must always be used with the pool->lock spinlock
  (bsc#1020795).
• dm thin: log info when growing the data or metadata device (bsc#1020795).
• dm thin: requeue bios to DM core if no_free_space and in read-only mode
  (bsc#1020795).
• dm thin: return error from alloc_data_block if pool is not in write mode
  (bsc#1020795).
• dm thin: simplify pool_is_congested (bsc#1020795).
• dm thin: sort the per thin deferred bios using an rb_tree (bsc#1020795).
• dm thin: synchronize the pool mode during suspend (bsc#1020795).
• dm thin: use bool rather than unsigned for flags in structures
  (bsc#1020795).
• dm thin: use INIT_WORK_ONSTACK in noflush_work to avoid ODEBUG warning
  (bsc#1020795).
• dm thin: use per thin device deferred bio lists (bsc#1020795).
• dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind
  (bsc#1020795).
• drm/i915: relax uncritical udelay_range() (bsc#1038261).
• ether: add loopback type ETH_P_LOOPBACK (bsc#1028595).
• ext4: fix bh leak on error paths in ext4_rename() and
  ext4_cross_rename() (bsc#1012985).
• ext4: fix fencepost in s_first_meta_bg validation (bsc#1029986).
• ext4: mark inode dirty after converting inline directory (bsc#1012985).
• ftrace: Make ftrace_location_range() global (FATE#322421).
• HID: usbhid: improve handling of Clear-Halt and reset (bsc#1031080).
• hv: util: catch allocation errors
• hv: utils: use memdup_user in hvt_op_write
• hwrng: virtio - ensure reads happen after successful probe (bsc#954763
  bsc#1032344).
• i40e: avoid null pointer dereference (bsc#922853).
• i40e/i40evf: Break up xmit_descriptor_count from maybe_stop_tx
  (bsc#985561).
• i40e/i40evf: Limit TSO to 7 descriptors for payload instead of 8 per
  packet (bsc#985561).
• i40e/i40evf: Rewrite logic for 8 descriptor per packet check
  (bsc#985561).
• i40e: Impose a lower limit on gso size (bsc#985561).
• i40e: Limit TX descriptor count in cases where frag size is greater than
  16K (bsc#985561).
• iommu/vt-d: Flush old iommu caches for kdump when the device gets
  context mapped (bsc#1023824).
• iommu/vt-d: Tylersburg isoch identity map check is done too late
  (bsc#1032125).
• ipv6: make ECMP route replacement less greedy (bsc#930399).
• kabi: hide changes in struct sk_buff (bsc#1009682).
• KABI: Hide new include in arch/powerpc/kernel/process.c (fate#322421).
• kABI: mask struct xfs_icdinode change (bsc#1024788).
• kABI: protect struct inet6_dev (kabi).
• kABI: protect struct iscsi_conn (bsc#103470).
• kABI: protect struct xfs_buftarg and struct xfs_mount (bsc#1024508).
• kABI: restore can_rx_register parameters (kabi).
• kernel/watchdog: use nmi registers snapshot in hardlockup handler
  (bsc#940946, bsc#937444).
• kgr: Mark eeh_event_handler() kthread safe using a timeout (bsc#1031662).
• kgr/module: make a taint flag module-specific
• kgr: remove unneeded kgr_needs_lazy_migration() s390x definition
• l2tp: fix address test in __l2tp_ip6_bind_lookup() (bsc#1028415).
• l2tp: fix lookup for sockets not bound to a device in l2tp_ip
  (bsc#1028415).
• l2tp: fix racy socket lookup in l2tp_ip and l2tp_ip6 bind()
  (bsc#1028415).
• l2tp: hold socket before dropping lock in l2tp_ip{, 6}_recv()
  (bsc#1028415).
• l2tp: hold tunnel socket when handling control frames in l2tp_ip and
  l2tp_ip6 (bsc#1028415).
• l2tp: lock socket before checking flags in connect() (bsc#1028415).
• livepatch: Allow architectures to specify an alternate ftrace location
  (FATE#322421).
• locking/semaphore: Add down_interruptible_timeout() (bsc#1031662).
• md: avoid oops on unload if some process is in poll or select
  (bsc#1020795).
• md: Convert use of typedef ctl_table to struct ctl_table (bsc#1020795).
• md: ensure metadata is writen after raid level change (bsc#1020795).
• md linear: fix a race between linear_add() and linear_congested()
  (bsc#1018446).
• md: md_clear_badblocks should return an error code on failure
  (bsc#1020795).
• md: refuse to change shape of array if it is active but read-only
  (bsc#1020795).
• megaraid_sas: add missing curly braces in ioctl handler (bsc#1023207).
• megaraid_sas: Fixup tgtid count in megasas_ld_list_query() (bsc#971933).
• mm/huge_memory.c: respect FOLL_FORCE/FOLL_COW for thp (bnc#1030118).
• mm, memcg: do not retry precharge charges (bnc#1022559).
• mm/mempolicy.c: do not put mempolicy before using its nodemask
  (References: VM Performance, bnc#931620).
• mm/page_alloc: fix nodes for reclaim in fast path (bnc#1031842).
• module: move add_taint_module() to a header file
• net: Add skb_gro_postpull_rcsum to udp and vxlan (bsc#1009682).
• net: add skb_pop_rcv_encapsulation (bsc#1009682).
• net: Call skb_checksum_init in IPv4 (bsc#1009682).
• net: Call skb_checksum_init in IPv6 (bsc#1009682).
• netfilter: allow logging fron non-init netns (bsc#970083).
• net: Generalize checksum_init functions (bsc#1009682).
• net: Preserve CHECKSUM_COMPLETE at validation (bsc#1009682).
• NFS: do not try to cross a mountpount when there isn’t one there
  (bsc#1028041).
• NFS: Expedite unmount of NFS auto-mounts (bnc#1025802).
• NFS: Fix a performance regression in readdir (bsc#857926).
• NFS: flush out dirty data on file fput() (bsc#1021762).
• ocfs2: do not write error flag to user structure we cannot copy from/to
  (bsc#1012985).
• powerpc: Blacklist GCC 5.4 6.1 and 6.2 (boo#1028895).
• powerpc: Create a helper for getting the kernel toc value (FATE#322421).
• powerpc/fadump: Fix the race in crash_fadump() (bsc#1022971).
• powerpc/fadump: Reserve memory at an offset closer to bottom of RAM
  (bsc#1032141).
• powerpc/fadump: Update fadump documentation (bsc#1032141).
• powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel
  (FATE#322421).
• powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI
  (FATE#322421).
• powerpc/ftrace: Use $(CC_FLAGS_FTRACE) when disabling ftrace
  (FATE#322421).
• powerpc/ftrace: Use generic ftrace_modify_all_code() (FATE#322421).
• powerpc: introduce TIF_KGR_IN_PROGRESS thread flag (FATE#322421).
• powerpc/kgraft: Add kgraft header (FATE#322421).
• powerpc/kgraft: Add kgraft stack to struct thread_info (FATE#322421).
• powerpc/kgraft: Add live patching support on ppc64le (FATE#322421).
• powerpc/module: Create a special stub for ftrace_caller() (FATE#322421).
• powerpc/module: Mark module stubs with a magic value (FATE#322421).
• powerpc/module: Only try to generate the ftrace_caller() stub once
  (FATE#322421).
• powerpc/modules: Never restore r2 for a mprofile-kernel style mcount()
  call (FATE#322421).
• powerpc/prom: Increase minimum RMA size to 512MB (bsc#984530).
• powerpc/pseries/cpuidle: Remove MAX_IDLE_STATE macro (bnc#1023164).
• powerpc/pseries/cpuidle: Use cpuidle_register() for initialisation
  (bnc#1023164).
• powerpc: Reject binutils 2.24 when building little endian (boo#1028895).
• RAID1: avoid unnecessary spin locks in I/O barrier code
  (bsc#982783,bsc#1020048).
• raid1: include bio_end_io_list in nr_queued to prevent freeze_array hang
• remove mpath patches from dmcache backport, for bsc#1035738
• revert "procfs: mark thread stack correctly in proc/PID/maps"
  (bnc#1030901).
• Revert "RDMA/core: Fix incorrect structure packing for booleans" (kabi).
• rtnetlink: allow to register ops without ops->setup set (bsc#1021374).
• s390/zcrypt: Introduce CEX6 toleration (FATE#321783, LTC#147506,
  bsc#1019514).
• sched/loadavg: Avoid loadavg spikes caused by delayed NO_HZ accounting
  (bsc#1018419).
• scsi_error: count medium access timeout only once per EH run
  (bsc#993832, bsc#1032345).
• scsi: libiscsi: add lock around task lists to fix list corruption
  regression (bsc#1034700).
• scsi: storvsc: fix SRB_STATUS_ABORTED handling
• sfc: reduce severity of PIO buffer alloc failures (bsc#1019168).
• svcrpc: fix gss-proxy NULL dereference in some error cases (bsc#1024309).
• taint/module: Clean up global and module taint flags handling
• tcp: abort orphan sockets stalling on zero window probes (bsc#1021913).
• thp: fix MADV_DONTNEED vs. numa balancing race (bnc#1027974).
• thp: reduce indentation level in change_huge_pmd() (bnc#1027974).
• treewide: fix "distingush" typo (bsc#1020795).
• tree-wide: use reinit_completion instead of INIT_COMPLETION
  (bsc#1020795).
• usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
  (bsc#1035699).
• usb: host: xhci: print correct command ring address (bnc#1035699).
• USB: serial: kl5kusb105: fix line-state error handling (bsc#1021256).
• vfs: Do not exchange "short" filenames unconditionally (bsc#1012985).
• vfs: split generic splice code from i_mutex locking (bsc#1024788).
• vmxnet3: segCnt can be 1 for LRO packets (bsc#988065).
• VSOCK: Detach QP check should filter out non matching QPs (bsc#1036752).
• vxlan: cancel sock_work in vxlan_dellink() (bsc#1031567).
• vxlan: Checksum fixes (bsc#1009682).
• vxlan: GRO support at tunnel layer (bsc#1009682).
• xen-blkfront: correct maximum segment accounting (bsc#1018263).
• xen-blkfront: do not call talk_to_blkback when already connected to
  blkback.
• xen-blkfront: free resources if xlvbd_alloc_gendisk fails.
• xfs_dmapi: fix the debug compilation of xfs_dmapi (bsc#989056).
• xfs: do not allow di_size with high bit set (bsc#1024234).
• xfs: do not assert fail on non-async buffers on ioacct decrement
  (bsc#1024508).
• xfs: exclude never-released buffers from buftarg I/O accounting
  (bsc#1024508).
• xfs: fix broken multi-fsb buffer logging (bsc#1024081).
• xfs: fix buffer overflow dm_get_dirattrs/dm_get_dirattrs2 (bsc#989056).
• xfs: Fix lock ordering in splice write (bsc#1024788).
• xfs: fix up xfs_swap_extent_forks inline extent handling (bsc#1023888).
• xfs: Make xfs_icdinode->di_dmstate atomic_t (bsc#1024788).
• xfs: pass total block res. as total xfs_bmapi_write() parameter
  (bsc#1029470).
• xfs: replace global xfslogd wq with per-mount wq (bsc#1024508).
• xfs: track and serialize in-flight async buffers against unmount
  (bsc#1024508).