Security update for the Linux Kernel (important)

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

The following security bugs were fixed:

• CVE-2017-5715: Systems with microprocessors utilizing speculative
  execution and indirect branch prediction may allow unauthorized
  disclosure
  of information to an attacker with local user access via a side-channel
  analysis (bnc#1068032).

  The previous fix using CPU Microcode has been complemented by building
  the Linux Kernel with return trampolines aka "retpolines".

• CVE-2018-5332: In the Linux kernel the rds_message_alloc_sgs() function
  did not validate a value that is used during DMA page allocation,
  leading to a heap-based out-of-bounds write (related to the
  rds_rdma_extra_size function in net/rds/rdma.c) (bnc#1075621).

• CVE-2018-5333: In the Linux kernel the rds_cmsg_atomic function in
  net/rds/rdma.c mishandled cases where page pinning fails or an invalid
  address is supplied, leading to an rds_atomic_free_op NULL pointer
  dereference (bnc#1075617).

• CVE-2017-18017: The tcpmss_mangle_packet function in
  net/netfilter/xt_TCPMSS.c in the Linux kernel allowed remote attackers
  to cause a denial of service (use-after-free and memory corruption)
  or possibly have unspecified other impact by leveraging the presence of
  xt_TCPMSS in an iptables action (bnc#1074488).

• CVE-2017-18079: drivers/input/serio/i8042.c in the Linux kernel allowed
  attackers to cause a denial of service (NULL pointer dereference and
  system crash) or possibly have unspecified other impact because the
  port->exists value can change after it is validated (bnc#1077922).

• CVE-2015-1142857: On multiple SR-IOV cars it is possible for VF’s
  assigned to guests to send ethernet flow control pause frames via the
  PF. (bnc#1077355).

• CVE-2017-17741: The KVM implementation in the Linux kernel allowed
  attackers to obtain potentially sensitive information from kernel
  memory, aka a write_mmio stack-based out-of-bounds read, related to
  arch/x86/kvm/x86.c and include/trace/events/kvm.h (bnc#1073311).

• CVE-2017-13215: A elevation of privilege vulnerability in the Upstream
  kernel skcipher. (bnc#1075908).

• CVE-2018-1000004: In the Linux kernel a race condition vulnerability
  existed in the sound system, this can lead to a deadlock and denial of
  service condition (bnc#1076017).

The following non-security bugs were fixed:

• alsa: aloop: Fix inconsistent format due to incomplete rule
  (bsc#1045538).
• alsa: aloop: Fix racy hw constraints adjustment (bsc#1045538).
• alsa: aloop: Release cable upon open error path (bsc#1045538).
• alsa: pcm: Abort properly at pending signal in OSS read/write loops
  (bsc#1045538).
• alsa: pcm: Add missing error checks in OSS emulation plugin builder
  (bsc#1045538).
• alsa: pcm: Allow aborting mutex lock at OSS read/write loops
  (bsc#1045538).
• alsa: pcm: Remove incorrect snd_BUG_ON() usages (bsc#1045538).
• alsa: pcm: Remove yet superfluous WARN_ON() (bsc#1045538).
• btrfs: cleanup unnecessary assignment when cleaning up all the residual
  transaction (FATE#325056).
• btrfs: copy fsid to super_block s_uuid (bsc#1080774).
• btrfs: do not wait for all the writers circularly during the transaction
  commit (FATE#325056).
• btrfs: do not WARN() in btrfs_transaction_abort() for IO errors
  (bsc#1080363).
• btrfs: fix two use-after-free bugs with transaction cleanup
  (FATE#325056).
• btrfs: make the state of the transaction more readable (FATE#325056).
• btrfs: qgroup: exit the rescan worker during umount (bsc#1080685).
• btrfs: qgroup: Fix dead judgement on qgroup_rescan_leaf() return value
  (bsc#1080685).
• btrfs: reset intwrite on transaction abort (FATE#325056).
• btrfs: set qgroup_ulist to be null after calling ulist_free()
  (bsc#1080359).
• btrfs: stop waiting on current trans if we aborted (FATE#325056).
• cdc-acm: apply quirk for card reader (bsc#1060279).
• cdrom: factor out common open_for_* code (bsc#1048585).
• cdrom: wait for tray to close (bsc#1048585).
• delay: add poll_event_interruptible (bsc#1048585).
• dm flakey: add corrupt_bio_byte feature (bsc#1080372).
• dm flakey: add drop_writes (bsc#1080372).
• dm flakey: error READ bios during the down_interval (bsc#1080372).
• dm flakey: fix crash on read when corrupt_bio_byte not set (bsc#1080372).
• dm flakey: fix reads to be issued if drop_writes configured
  (bsc#1080372).
• dm flakey: introduce "error_writes" feature (bsc#1080372).
• dm flakey: support feature args (bsc#1080372).
• dm flakey: use dm_target_offset and support discards (bsc#1080372).
• ext2: free memory allocated and forget buffer head when io error happens
  (bnc#1069508).
• ext2: use unlikely to improve the efficiency of the kernel (bnc#1069508).
• ext3: add necessary check in case IO error happens (bnc#1069508).
• ext3: use unlikely to improve the efficiency of the kernel (bnc#1069508).
• fork: clear thread stack upon allocation (bsc#1077560).
• kaiser: Add proper NX handling for !NX-capable systems also to
  kaiser_add_user_map(). (bsc#1076278).
• kaiser: do not clobber ZF by calling ENABLE_IBRS after test and before jz
• kaiser: fix ia32 compat sysexit (bsc#1080579) sysexit_from_sys_call
  cannot make assumption of accessible stack after CR3 switch, and
  therefore should use the SWITCH_USER_CR3_NO_STACK method to flip the
  pagetable hierarchy.
• kaiser: Fix trampoline stack loading issue on XEN PV
• kaiser: handle non-accessible stack in sysretl_from_sys_call properly
  (bsc#bsc#1080579)
• kaiser: make sure not to touch stack after CR3 switch in compat syscall
  return
• kaiser: really do switch away from trampoline stack to kernel stack in
  ia32_syscall entry (bsc#1080579)
• kbuild: modversions for EXPORT_SYMBOL() for asm (bsc#1074621
  bsc#1068032).
• keys: trusted: fix writing past end of buffer in trusted_read()
  (bsc#1074880).
• media: omap_vout: Fix a possible null pointer dereference in
  omap_vout_open() (bsc#1050431).
• mISDN: fix a loop count (bsc#1077191).
• nfsd: do not share group_info among threads (bsc@1070623).
• ocfs2: avoid blocking in ocfs2_mark_lockres_freeing() in downconvert
  thread (bsc#1076437).
• ocfs2: do not set OCFS2_LOCK_UPCONVERT_FINISHING if nonblocking lock can
  not be granted at once (bsc#1076437).
• ocfs2: NFS hangs in __ocfs2_cluster_lock due to race with
  ocfs2_unblock_lock (bsc#962257).
• powerpc/64: Add macros for annotating the destination of rfid/hrfid
  (bsc#1068032, bsc#1075088).
• powerpc/64: Convert fast_exception_return to use RFI_TO_USER/KERNEL
  (bsc#1068032, bsc#1075088).
• powerpc/64: Convert the syscall exit path to use RFI_TO_USER/KERNEL
  (bsc#1068032, bsc#1075088).
• powerpc/64s: Add EX_SIZE definition for paca exception save areas
  (bsc#1068032, bsc#1075088).
• powerpc/64s: Add support for RFI flush of L1-D cache (bsc#1068032,
  bsc#1075088).
• powerpc/64s: Allow control of RFI flush via debugfs (bsc#1068032,
  bsc#1075088).
• powerpc/64s: Convert slb_miss_common to use RFI_TO_USER/KERNEL
  (bsc#1068032, bsc#1075088).
• powerpc/64s: Simple RFI macro conversions (bsc#1068032, bsc#1075088).
• powerpc/64s: Support disabling RFI flush with no_rfi_flush and nopti
  (bsc#1068032, bsc#1075088).
• powerpc/64s: Wire up cpu_show_meltdown() (bsc#1068032).
• powerpc/asm: Allow including ppc_asm.h in asm files (bsc#1068032,
  bsc#1075088).
• powerpc: Fix register clobbering when accumulating stolen time
  (bsc#1059174).
• powerpc: Fix up the kdump base cap to 128M (bsc#1079917, bsc#1077487).
• powerpc: Mark CONFIG_PPC_DEBUG_RFI as BROKEN (bsc#1075088).
• powerpc/perf: Dereference BHRB entries safely (bsc#1064861, FATE#317619,
  git-fixes).
• powerpc/perf: Fix book3s kernel to userspace backtraces (bsc#1080133).
• powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper
  (bsc#1068032, bsc#1075088).
• powerpc/pseries: include linux/types.h in asm/hvcall.h (bsc#1068032,
  bsc#1075088).
• powerpc/pseries: Introduce H_GET_CPU_CHARACTERISTICS (bsc#1068032,
  bsc#1075088).
• powerpc/pseries: Kill all prefetch streams on context switch
  (bsc#1068032, bsc#1075088).
• powerpc/pseries: Query hypervisor for RFI flush settings (bsc#1068032,
  bsc#1075088).
• powerpc/pseries: rfi-flush: Call setup_rfi_flush() after LPM migration
  (bsc#1068032, bsc#1075088).
• powerpc/pseries/rfi-flush: Call setup_rfi_flush() after LPM migration
  (bsc#1075088).
• powerpc/pseries/rfi-flush: Drop PVR-based selection (bsc#1075088).
• powerpc/rfi-flush: Add DEBUG_RFI config option (bsc#1068032,
  bsc#1075088).
• powerpc/rfi-flush: Factor out init_fallback_flush() (bsc#1075088).
• powerpc/rfi-flush: Make setup_rfi_flush() not __init (bsc#1075088).
• powerpc/rfi-flush: Move RFI flush fields out of the paca (unbreak kABI)
  (bsc#1068032, bsc#1075088).
• powerpc/rfi-flush: Move the logic to avoid a redo into the sysfs code
  (bsc#1068032, bsc#1075088).
• powerpc/rfi-flush: Move the logic to avoid a redo into the sysfs code
  (bsc#1075088).
• powerpc/vdso64: Use double word compare on pointers (bsc#1070781).
• rfi-flush: Make DEBUG_RFI a CONFIG option (bsc#1068032, bsc#1075088).
• rfi-flush: Move rfi_flush_fallback_area to end of paca (bsc#1075088).
• rfi-flush: Move RFI flush fields out of the paca (unbreak kABI)
  (bsc#1075088).
• rfi-flush: Switch to new linear fallback flush (bsc#1068032,bsc#1075088).
• s390: add ppa to the idle loop (bnc#1077406, LTC#163910).
• s390/cpuinfo: show facilities as reported by stfle (bnc#1076849,
  LTC#163741).
• scsi: libiscsi: fix shifting of DID_REQUEUE host byte (bsc#1078875).
• scsi: sr: wait for the medium to become ready (bsc#1048585).
• scsi: virtio_scsi: let host do exception handling
  (bsc#936530,bsc#1060682).
• storvsc: do not assume SG list is continuous when doing bounce buffers
  (bsc#1075410).
• sysfs/cpu: Add vulnerability folder (bnc#1012382).
• sysfs/cpu: Fix typos in vulnerability documentation (bnc#1012382).
• sysfs: spectre_v2, handle spec_ctrl (bsc#1075994 bsc#1075091).
• x86/acpi: Handle SCI interrupts above legacy space gracefully
  (bsc#1068984).
• x86/acpi: Reduce code duplication in mp_override_legacy_irq()
  (bsc#1068984).
• x86, asm: Extend definitions of ASM* with a raw format (bsc#1068032
  CVE-2017-5754).
• x86/boot: Fix early command-line parsing when matching at end
  (bsc#1068032).
• x86/cpu: Factor out application of forced CPU caps (bsc#1075994
  bsc#1075091).
• x86/cpu: Implement CPU vulnerabilites sysfs functions (bnc#1012382).
• x86/CPU: Sync CPU feature flags late (bsc#1075994 bsc#1075091).
• x86/kaiser: Populate shadow PGD with NX bit only if supported by
  platform (bsc#1076154 bsc#1076278).
• x86/kaiser: use trampoline stack for kernel entry.
• x86/microcode/intel: Extend BDW late-loading further with LLC size check
  (bsc#1054305).
• x86/microcode/intel: Extend BDW late-loading with a revision check
  (bsc#1054305).
• x86/microcode: Rescan feature flags upon late loading (bsc#1075994
  bsc#1075091).
• x86/retpolines/spec_ctrl: disable IBRS on !SKL if retpolines are active
  (bsc#1068032).
• x86/spec_ctrl: handle late setting of X86_FEATURE_SPEC_CTRL properly
  (bsc#1075994 bsc#1075091).
• x86/spectre_v2: fix ordering in IBRS initialization (bsc#1075994
  bsc#1075091).
• x86/spectre_v2: nospectre_v2 means nospec too (bsc#1075994 bsc#1075091).
• x86/speculation: Fix typo IBRS_ATT, which should be IBRS_ALL
  (bsc#1068032 CVE-2017-5715).
• mm: pin address_space before dereferencing it while isolating an LRU
  page (bnc#1081500).