Security update for the Linux Kernel (important)

The SUSE Linux Enterprise 12 SP1 kernel was updated to 3.12.53 to receive
various security and bugfixes.

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-2015-5707: Integer overflow in the sg_start_req function in
  drivers/scsi/sg.c in the Linux kernel allowed local users to cause a
  denial of service or possibly have unspecified other impact via a large
  iov_count value in a write request (bnc#940338).
• 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-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the
  Linux kernel did not ensure that certain slot numbers are valid, which
  allowed local users to cause a denial of service (NULL pointer
  dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call
  (bnc#949936).
• CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in the Linux kernel
  did not validate attempted changes to the MTU value, which allowed
  context-dependent attackers to cause a denial of service (packet loss)
  via a value that was (1) smaller than the minimum compliant value or (2)
  larger than the MTU of an interface, as demonstrated by a Router
  Advertisement (RA) message that is not validated by a daemon, a
  different vulnerability than CVE-2015-0272 (bnc#955354).
• 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: Optimizations introduced by the compiler could have lead
  to double fetch vulnerabilities, potentially possibly leading to
  arbitrary code execution in backend (bsc#957988).
• CVE-2015-8551: Xen PCI backend driver did not perform proper sanity
  checks on the device’s state, allowing for DoS (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#959399).
• CVE-2015-8660: The ovl_setattr function in fs/overlayfs/inode.c in the
  Linux kernel attempted to merge distinct setattr operations, which
  allowed local users to bypass intended access restrictions and modify
  the attributes of arbitrary overlay files via a crafted application
  (bnc#960281).
• 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-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: A race in invalidating paging structures that were not in
  use locally could have lead to disclosoure of information or arbitrary
  code exectution (bnc#963767).

The following non-security bugs were fixed:

• ACPI: Introduce apic_id in struct processor to save parsed APIC id
  (bsc#959463).
• ACPI: Make it possible to get local x2apic id via _MAT (bsc#959463).
• ACPI: use apic_id and remove duplicated _MAT evaluation (bsc#959463).
• ACPICA: Correctly cleanup after a ACPI table load failure (bnc#937261).
• Add sd_mod to initrd modules. For some reason PowerVM backend can’t work
  without sd_mod
• Do not modify perf bias performance setting by default at boot
  (bnc#812259, bsc#959629).
• Documentation: Document kernel.panic_on_io_nmi sysctl (bsc#940946,
  bsc#937444).
• Driver for IBM System i/p VNIC protocol
• Drop blktap patches from SLE12, since the driver is unsupported
• Improve fairness when locking the per-superblock s_anon list
  (bsc#957525, bsc#941363).
• Input: aiptek - fix crash on detecting device without endpoints
  (bnc#956708).
• NFSD: Do not start lockd when only NFSv4 is running
• NFSv4: Recovery of recalled read delegations is broken (bsc#956514).
• Replace with 176bed1d vmstat: explicitly schedule per-cpu work on the
  CPU we need it to run on
• Revert "ipv6: add complete rcu protection around np->opt" (bnc#961257).
• Revert 874bbfe60 workqueue: make sure delayed work run in local cpu 1.
  Without 22b886dd, 874bbfe60 leads to timer corruption. 2. With 22b886dd
  applied, victim of 1 reports performance regression (1,2
  <a href=“https://lkml.org/lkml/2016/2/4/618”>https://lkml.org/lkml/2016/2/4/618</a>) 3. Leads to scheduling work to
  offlined CPU (bnc#959463). SLERT: 4. NO_HZ_FULL regressession, unbound
  delayed work timer is no longer deflected to a housekeeper CPU.
• be2net: fix some log messages (bnc#855062, bnc#867583).
• 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#902606).
• block: Always check queue limits for cloned requests (bsc#902606).
• bnx2x: Add new device ids under the Qlogic vendor (bnc#964821).
• btrfs: Add qgroup tracing (bnc#935087, bnc#945649).
• btrfs: Update btrfs qgroup status item when rescan is done (bnc#960300).
• btrfs: backref: Add special time_seq == (u64)-1 case for
  btrfs_find_all_roots() (bnc#935087, bnc#945649).
• btrfs: backref: Do not merge refs which are not for same block
  (bnc#935087, bnc#945649).
• btrfs: delayed-ref: Cleanup the unneeded functions (bnc#935087,
  bnc#945649).
• btrfs: delayed-ref: Use list to replace the ref_root in ref_head
  (bnc#935087, bnc#945649).
• btrfs: extent-tree: Use ref_node to replace unneeded parameters in
  __inc_extent_ref() and __free_extent() (bnc#935087, bnc#945649).
• btrfs: fix comp_oper to get right order (bnc#935087, bnc#945649).
• btrfs: fix deadlock between direct IO write and defrag/readpages
  (bnc#965344).
• btrfs: fix leak in qgroup_subtree_accounting() error path (bnc#935087,
  bnc#945649).
• btrfs: fix order by which delayed references are run (bnc#949440).
• btrfs: fix qgroup sanity tests (bnc#951615).
• btrfs: fix race waiting for qgroup rescan worker (bnc#960300).
• btrfs: fix regression running delayed references when using qgroups
  (bnc#951615).
• btrfs: fix regression when running delayed references (bnc#951615).
• btrfs: fix sleeping inside atomic context in qgroup rescan worker
  (bnc#960300).
• btrfs: keep dropped roots in cache until transaction commit (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Add function qgroup_update_counters() (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Add function qgroup_update_refcnt() (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Add new function to record old_roots (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Add new qgroup calculation function
  btrfs_qgroup_account_extents() (bnc#935087, bnc#945649).
• btrfs: qgroup: Add the ability to skip given qgroup for old/new_roots
  (bnc#935087, bnc#945649).
• btrfs: qgroup: Cleanup open-coded old/new_refcnt update and read
  (bnc#935087, bnc#945649).
• btrfs: qgroup: Cleanup the old ref_node-oriented mechanism (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Do not copy extent buffer to do qgroup rescan
  (bnc#960300).
• btrfs: qgroup: Fix a regression in qgroup reserved space (bnc#935087,
  bnc#945649).
• btrfs: qgroup: Make snapshot accounting work with new extent-oriented
  qgroup (bnc#935087, bnc#945649).
• btrfs: qgroup: Record possible quota-related extent for qgroup
  (bnc#935087, bnc#945649).
• btrfs: qgroup: Switch rescan to new mechanism (bnc#935087, bnc#945649).
• btrfs: qgroup: Switch self test to extent-oriented qgroup mechanism
  (bnc#935087, bnc#945649).
• btrfs: qgroup: Switch to new extent-oriented qgroup mechanism
  (bnc#935087, bnc#945649).
• btrfs: qgroup: account shared subtree during snapshot delete
  (bnc#935087, bnc#945649).
• btrfs: qgroup: clear STATUS_FLAG_ON in disabling quota (bnc#960300).
• btrfs: qgroup: exit the rescan worker during umount (bnc#960300).
• btrfs: qgroup: fix quota disable during rescan (bnc#960300).
• btrfs: qgroup: move WARN_ON() to the correct location (bnc#935087,
  bnc#945649).
• btrfs: remove transaction from send (bnc#935087, bnc#945649).
• btrfs: skip locking when searching commit root (bnc#963825).
• btrfs: ulist: Add ulist_del() function (bnc#935087, bnc#945649).
• btrfs: use btrfs_get_fs_root in resolve_indirect_ref (bnc#935087,
  bnc#945649).
• crypto: nx - use common code for both NX decompress success cases
  (bsc#942476).
• crypto: nx-842 - Mask XERS0 bit in return value (bsc#960221).
• driver core: Add BUS_NOTIFY_REMOVED_DEVICE event (bnc#962965).
• drivers/firmware/memmap.c: do not allocate firmware_map_entry of same
  memory range (bsc#959463).
• drivers/firmware/memmap.c: do not create memmap sysfs of same
  firmware_map_entry (bsc#959463).
• drivers/firmware/memmap.c: pass the correct argument to
  firmware_map_find_entry_bootmem() (bsc#959463).
• 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).
• fuse: break infinite loop in fuse_fill_write_pages() (bsc#963765).
• group-source-files: mark module.lds as devel file ld: cannot open linker
  script file /usr/src/linux-4.2.5-1/arch/arm/kernel/module.lds: No such
  file or directory
• ipv6: fix tunnel error handling (bsc#952579).
• jbd2: Fix unreclaimed pages after truncate in data=journal mode
  (bsc#961516).
• kABI: reintroduce blk_rq_check_limits.
• kabi: protect struct acpi_processor signature (bsc#959463).
• kernel/watchdog.c: perform all-CPU backtrace in case of hard lockup
  (bsc#940946, bsc#937444).
• kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val) (bsc#940946,
  bsc#937444).
• kernel: Provide READ_ONCE and ASSIGN_ONCE (bsc#940946, bsc#937444).
• kernel: inadvertent free of the vector register save area (bnc#961202).
• kexec: Fix race between panic() and crash_kexec() (bsc#940946,
  bsc#937444).
• kgr: Remove the confusing search for fentry
• kgr: Safe way to avoid an infinite redirection
• kgr: do not print error for !abort_if_missing symbols (bnc#943989).
• kgr: do not use WQ_MEM_RECLAIM workqueue (bnc#963572).
• kgr: log when modifying kernel
• kgr: mark some more missed kthreads (bnc#962336).
• kgr: usb/storage: do not emit thread awakened (bnc#899908).
• kvm: Add arch specific mmu notifier for page invalidation (bsc#959463).
• kvm: Make init_rmode_identity_map() return 0 on success (bsc#959463).
• kvm: Remove ept_identity_pagetable from struct kvm_arch (bsc#959463).
• kvm: Rename make_all_cpus_request() to kvm_make_all_cpus_request() and
  make it non-static (bsc#959463).
• kvm: Use APIC_DEFAULT_PHYS_BASE macro as the apic access page address
  (bsc#959463).
• kvm: vmx: Implement set_apic_access_page_addr (bsc#959463).
• kvm: x86: Add request bit to reload APIC access page address
  (bsc#959463).
• kvm: x86: Unpin and remove kvm_arch->apic_access_page (bsc#959463).
• libiscsi: Fix host busy blocking during connection teardown.
• lpfc: Fix null ndlp dereference in target_reset_handler (bsc#951392).
• md/bitmap: do not pass -1 to bitmap_storage_alloc (bsc#955118).
• md/bitmap: remove confusing code from filemap_get_page.
• md/bitmap: remove rcu annotation from pointer arithmetic.
• mem-hotplug: reset node managed pages when hot-adding a new pgdat
  (bsc#959463).
• mem-hotplug: reset node present pages when hot-adding a new pgdat
  (bsc#959463).
• memory-hotplug: clear pgdat which is allocated by bootmem in
  try_offline_node() (bsc#959463).
• mm/memory_hotplug.c: check for missing sections in
  test_pages_in_a_zone() (VM Functionality, bnc#961588).
• mm/mempolicy.c: convert the shared_policy lock to a rwlock (VM
  Performance, bnc#959436).
• module: keep percpu symbols in module’s symtab (bsc#962788).
• nmi: provide the option to issue an NMI back trace to every cpu but
  current (bsc#940946, bsc#937444).
• nmi: provide the option to issue an NMI back trace to every cpu but
  current (bsc#940946, bsc#937444).
• nvme: Clear BIO_SEG_VALID flag in nvme_bio_split() (bsc#954992).
• panic, x86: Allow CPUs to save registers even if looping in NMI context
  (bsc#940946, bsc#937444).
• panic, x86: Fix re-entrance problem due to panic on NMI (bsc#940946,
  bsc#937444).
• pci: Check for valid tags when calculating the VPD size (bsc#959146).
• qeth: initialize net_device with carrier off (bnc#964230).
• rpm/constraints.in: Bump disk space requirements up a bit Require 10GB
  on s390x, 20GB elsewhere.
• rpm/kernel-binary.spec.in: Fix build if no UEFI certs are installed
• rpm/kernel-binary.spec.in: Fix kernel-vanilla-devel dependency
  (bsc#959090)
• rpm/kernel-binary.spec.in: Fix paths in kernel-vanilla-devel
  (bsc#959090).
• rpm/kernel-binary.spec.in: Install libopenssl-devel for newer sign-file
• rpm/kernel-binary.spec.in: Use bzip compression to speed up build
  (bsc#962356)
• rpm/kernel-source.spec.in: Install kernel-macros for
  kernel-source-vanilla (bsc#959090)
• rpm/kernel-spec-macros: Do not modify the release string in PTFs
  (bsc#963449)
• rpm/package-descriptions: Add kernel-zfcpdump and drop -desktop
• s390/cio: ensure consistent measurement state (bnc#964230).
• s390/cio: fix measurement characteristics memleak (bnc#964230).
• s390/cio: update measurement characteristics (bnc#964230).
• s390/dasd: fix failfast for disconnected devices (bnc#961202).
• s390/vtime: correct scaled cputime for SMT (bnc#964230).
• s390/vtime: correct scaled cputime of partially idle CPUs (bnc#964230).
• s390/vtime: limit MT scaling value updates (bnc#964230).
• sched,numa: cap pte scanning overhead to 3% of run time (Automatic NUMA
  Balancing).
• sched/fair: Care divide error in update_task_scan_period() (bsc#959463).
• sched/fair: Disable tg load_avg/runnable_avg update for root_task_group
  (bnc#960227).
• sched/fair: Move cache hot load_avg/runnable_avg into separate cacheline
  (bnc#960227).
• sched/numa: Cap PTE scanning overhead to 3% of run time (Automatic NUMA
  Balancing).
• sched: Fix race between task_group and sched_task_group (Automatic NUMA
  Balancing).
• scsi: restart list search after unlock in scsi_remove_target
  (bsc#944749, bsc#959257).
• supported.conf: Add more QEMU and VMware drivers to -base (bsc#965840).
• supported.conf: Add netfilter modules to base (bsc#950292)
• supported.conf: Add nls_iso8859-1 and nls_cp437 to -base (bsc#950292)
• supported.conf: Add vfat to -base to be able to mount the ESP
  (bsc#950292).
• supported.conf: Add virtio_{blk,net,scsi} to kernel-default-base
  (bsc#950292)
• supported.conf: Also add virtio_pci to kernel-default-base (bsc#950292).
• supported.conf: drop +external from ghash-clmulni-intel It was agreed
  that it does not make sense to maintain "external" for this specific
  module. Furthermore it causes problems in rather ordinary VMware
  environments. (bsc#961971)
• udp: properly support MSG_PEEK with truncated buffers (bsc#951199
  bsc#959364).
• x86, xsave: Support eager-only xsave features, add MPX support
  (bsc#938577).
• x86/apic: Introduce apic_extnmi command line parameter (bsc#940946,
  bsc#937444).
• x86/fpu/xstate: Do not assume the first zero xfeatures zero bit means
  the end (bsc#938577).
• x86/fpu: Fix double-increment in setup_xstate_features() (bsc#938577).
• x86/fpu: Remove xsave_init() bootmem allocations (bsc#938577).
• x86/nmi: Save regs in crash dump on external NMI (bsc#940946,
  bsc#937444).
• x86/nmi: Save regs in crash dump on external NMI (bsc#940946,
  bsc#937444).
• xen/pciback: Do not allow MSI-X ops if PCI_COMMAND_MEMORY is not set
  (bsc#957990 XSA-157).
• xfs: add a few more verifier tests (bsc#947953).
• xfs: fix double free in xlog_recover_commit_trans (bsc#947953).
• xfs: recovery of XLOG_UNMOUNT_TRANS leaks memory (bsc#947953).