SUSE-SU-2018:2362-1: important: Security update for the Linux Kernel

Thu Aug 16 04:33:33 MDT 2018

   SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:2362-1
Rating:             important
References:         #1012382 #1064232 #1068032 #1087081 #1089343 
                    #1098016 #1099924 #1100416 #1100418 #1103119 

Cross-References:   CVE-2018-13053 CVE-2018-13405 CVE-2018-13406
                    CVE-2018-14734 CVE-2018-3620 CVE-2018-3646

Affected Products:
                    SUSE Linux Enterprise Server 12-LTSS
                    SUSE Linux Enterprise Module for Public Cloud 12
______________________________________________________________________________

   An update that solves 6 vulnerabilities and has four fixes
   is now available.

Description:

   The SUSE Linux Enterprise 12 GA LTSS kernel was updated to receive various
   security and bugfixes.

   The following security bugs were fixed:

   - CVE-2018-13053: The alarm_timer_nsleep function in
     kernel/time/alarmtimer.c had an integer overflow via a large relative
     timeout because ktime_add_safe is not used (bnc#1099924).
   - CVE-2018-13405: The inode_init_owner function in fs/inode.c allowed
     local users to create files with an unintended group ownership, in a
     scenario where a directory is SGID to a certain group and is writable by
     a user who is not a member of that group. Here, the non-member can
     trigger creation of a plain file whose group ownership is that group.
     The intended behavior was that the non-member can trigger creation of a
     directory (but not a plain file) whose group ownership is that group.
     The non-member can escalate privileges by making the plain file
     executable and SGID (bnc#1100416).
   - CVE-2018-13406: An integer overflow in the uvesafb_setcmap function in
     drivers/video/fbdev/uvesafb.c could result in local attackers being able
     to crash the kernel or potentially elevate privileges because
     kmalloc_array is not used (bnc#1098016 bnc#1100418).
   - CVE-2018-14734: drivers/infiniband/core/ucma.c allowed
     ucma_leave_multicast to access a certain data structure after a cleanup
     step in ucma_process_join, which allowed attackers to cause a denial of
     service (use-after-free) (bnc#1103119).
   - CVE-2018-3620: Local attackers on baremetal systems could use
     speculative code patterns on hyperthreaded processors to read data
     present in the L1 Datacache used by other hyperthreads on the same CPU
     core, potentially leaking sensitive data. (bnc#1087081).
   - CVE-2018-3646: Local attackers in virtualized guest systems could use
     speculative code patterns on hyperthreaded processors to read data
     present in the L1 Datacache used by other hyperthreads on the same CPU
     core, potentially leaking sensitive data, even from other virtual
     machines or the host system. (bnc#1089343).

   The following non-security bugs were fixed:

   - bcache: Add __printf annotation to __bch_check_keys() (bsc#1064232).
   - bcache: Annotate switch fall-through (bsc#1064232).
   - bcache: Fix a compiler warning in bcache_device_init() (bsc#1064232).
   - bcache: Fix indentation (bsc#1064232).
   - bcache: Fix kernel-doc warnings (bsc#1064232).
   - bcache: Fix, improve efficiency of closure_sync() (bsc#1064232).
   - bcache: Reduce the number of sparse complaints about lock imbalances
     (bsc#1064232).
   - bcache: Remove an unused variable (bsc#1064232).
   - bcache: Suppress more warnings about set-but-not-used variables
     (bsc#1064232).
   - bcache: Use PTR_ERR_OR_ZERO() (bsc#1064232).
   - bcache: add CACHE_SET_IO_DISABLE to struct cache_set flags (bsc#1064232).
   - bcache: add backing_request_endio() for bi_end_io (bsc#1064232).
   - bcache: add io_disable to struct cached_dev (bsc#1064232).
   - bcache: add journal statistic (bsc#1064232).
   - bcache: add stop_when_cache_set_failed option to backing device
     (bsc#1064232).
   - bcache: add wait_for_kthread_stop() in bch_allocator_thread()
     (bsc#1064232).
   - bcache: closures: move control bits one bit right (bsc#1064232).
   - bcache: correct flash only vols (check all uuids) (bsc#1064232).
   - bcache: count backing device I/O error for writeback I/O (bsc#1064232).
   - bcache: do not attach backing with duplicate UUID (bsc#1064232).
   - bcache: fix cached_dev->count usage for bch_cache_set_error()
     (bsc#1064232).
   - bcache: fix crashes in duplicate cache device register (bsc#1064232).
   - bcache: fix error return value in memory shrink (bsc#1064232).
   - bcache: fix for allocator and register thread race (bsc#1064232).
   - bcache: fix for data collapse after re-attaching an attached device
     (bsc#1064232).
   - bcache: fix high CPU occupancy during journal (bsc#1064232).
   - bcache: fix incorrect sysfs output value of strip size (bsc#1064232).
   - bcache: fix kcrashes with fio in RAID5 backend dev (bsc#1064232).
   - bcache: fix misleading error message in bch_count_io_errors()
     (bsc#1064232).
   - bcache: fix using of loop variable in memory shrink (bsc#1064232).
   - bcache: fix writeback target calc on large devices (bsc#1064232).
   - bcache: fix wrong return value in bch_debug_init() (bsc#1064232).
   - bcache: mark closure_sync() __sched (bsc#1064232).
   - bcache: move closure debug file into debug directory (bsc#1064232).
   - bcache: properly set task state in bch_writeback_thread() (bsc#1064232).
   - bcache: quit dc->writeback_thread when BCACHE_DEV_DETACHING is set
     (bsc#1064232).
   - bcache: reduce cache_set devices iteration by devices_max_used
     (bsc#1064232).
   - bcache: ret IOERR when read meets metadata error (bsc#1064232).
   - bcache: return 0 from bch_debug_init() if CONFIG_DEBUG_FS=n
     (bsc#1064232).
   - bcache: return attach error when no cache set exist (bsc#1064232).
   - bcache: segregate flash only volume write streams (bsc#1064232).
   - bcache: set CACHE_SET_IO_DISABLE in bch_cached_dev_error() (bsc#1064232).
   - bcache: set dc->io_disable to true in conditional_stop_bcache_device()
     (bsc#1064232).
   - bcache: set error_limit correctly (bsc#1064232).
   - bcache: set writeback_rate_update_seconds in range [1, 60] seconds
     (bsc#1064232).
   - bcache: stop bcache device when backing device is offline (bsc#1064232).
   - bcache: stop dc->writeback_rate_update properly (bsc#1064232).
   - bcache: stop writeback thread after detaching (bsc#1064232).
   - bcache: store disk name in struct cache and struct cached_dev
     (bsc#1064232).
   - bcache: use pr_info() to inform duplicated CACHE_SET_IO_DISABLE set
     (bsc#1064232).
   - cpu/hotplug: Add sysfs state interface (bsc#1089343).
   - cpu/hotplug: Provide knobs to control SMT (bsc#1089343).
   - cpu/hotplug: Provide knobs to control SMT (bsc#1089343).
   - cpu/hotplug: Split do_cpu_down() (bsc#1089343).
   - x86/CPU/AMD: Do not check CPUID max ext level before parsing SMP info
     (bsc#1089343).
   - x86/CPU/AMD: Move TOPOEXT reenablement before reading smp_num_siblings
     (bsc#1089343).
   - x86/Xen: disable IBRS around CPU stopper function invocation (none so
     far).
   - x86/cpu/AMD: Evaluate smp_num_siblings early (bsc#1089343).
   - x86/cpu/AMD: Evaluate smp_num_siblings early (bsc#1089343).
   - x86/cpu/AMD: Remove the pointless detect_ht() call (bsc#1089343).
   - x86/cpu/common: Provide detect_ht_early() (bsc#1089343).
   - x86/cpu/intel: Evaluate smp_num_siblings early (bsc#1089343).
   - x86/cpu/topology: Provide detect_extended_topology_early() (bsc#1089343).
   - x86/cpu: Remove the pointless CPU printout (bsc#1089343).
   - x86/cpufeatures: Add X86_BUG_SPECTRE_V[12] (bnc#1012382).
   - x86/mm: Simplify p[g4um]xen: d_page() macros (bnc#1087081).
   - x86/smp: Provide topology_is_primary_thread() (bsc#1089343).
   - x86/smpboot: Do not use smp_num_siblings in __max_logical_packages
     calculation (bsc#1089343).
   - x86/topology: Add topology_max_smt_threads() (bsc#1089343).
   - x86/topology: Provide topology_smt_supported() (bsc#1089343).
   - xen/x86/cpu/common: Provide detect_ht_early() (bsc#1089343).
   - xen/x86/cpu/topology: Provide detect_extended_topology_early()
     (bsc#1089343).
   - xen/x86/cpu: Remove the pointless CPU printout (bsc#1089343).
   - xen/x86/cpufeatures: Add X86_BUG_CPU_INSECURE (bnc#1012382).
   - xen/x86/cpufeatures: Make CPU bugs sticky (bnc#1012382).
   - xen/x86/entry: Add a function to overwrite the RSB (bsc#1068032).
   - xen/x86/entry: Stuff RSB for entry to kernel for non-SMEP platform
     (bsc#1068032).
   - xen/x86/entry: Use IBRS on entry to kernel space (bsc#1068032).
   - xen/x86/mm: Set IBPB upon context switch (bsc#1068032).
   - xen/x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN (bnc#1012382).

Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2018-1605=1

   - SUSE Linux Enterprise Module for Public Cloud 12:

      zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2018-1605=1

Package List:

   - SUSE Linux Enterprise Server 12-LTSS (ppc64le s390x x86_64):

      kernel-default-3.12.61-52.141.1
      kernel-default-base-3.12.61-52.141.1
      kernel-default-base-debuginfo-3.12.61-52.141.1
      kernel-default-debuginfo-3.12.61-52.141.1
      kernel-default-debugsource-3.12.61-52.141.1
      kernel-default-devel-3.12.61-52.141.1
      kernel-syms-3.12.61-52.141.1

   - SUSE Linux Enterprise Server 12-LTSS (noarch):

      kernel-devel-3.12.61-52.141.1
      kernel-macros-3.12.61-52.141.1
      kernel-source-3.12.61-52.141.1

   - SUSE Linux Enterprise Server 12-LTSS (x86_64):

      kernel-xen-3.12.61-52.141.1
      kernel-xen-base-3.12.61-52.141.1
      kernel-xen-base-debuginfo-3.12.61-52.141.1
      kernel-xen-debuginfo-3.12.61-52.141.1
      kernel-xen-debugsource-3.12.61-52.141.1
      kernel-xen-devel-3.12.61-52.141.1
      kgraft-patch-3_12_61-52_141-default-1-1.5.1
      kgraft-patch-3_12_61-52_141-xen-1-1.5.1
      lttng-modules-2.4.1-16.6.1
      lttng-modules-debugsource-2.4.1-16.6.1
      lttng-modules-kmp-default-2.4.1_k3.12.61_52.141-16.6.1
      lttng-modules-kmp-default-debuginfo-2.4.1_k3.12.61_52.141-16.6.1

   - SUSE Linux Enterprise Server 12-LTSS (s390x):

      kernel-default-man-3.12.61-52.141.1

   - SUSE Linux Enterprise Module for Public Cloud 12 (x86_64):

      kernel-ec2-3.12.61-52.141.1
      kernel-ec2-debuginfo-3.12.61-52.141.1
      kernel-ec2-debugsource-3.12.61-52.141.1
      kernel-ec2-devel-3.12.61-52.141.1
      kernel-ec2-extra-3.12.61-52.141.1
      kernel-ec2-extra-debuginfo-3.12.61-52.141.1

References:

   https://www.suse.com/security/cve/CVE-2018-13053.html
   https://www.suse.com/security/cve/CVE-2018-13405.html
   https://www.suse.com/security/cve/CVE-2018-13406.html
   https://www.suse.com/security/cve/CVE-2018-14734.html
   https://www.suse.com/security/cve/CVE-2018-3620.html
   https://www.suse.com/security/cve/CVE-2018-3646.html
   https://bugzilla.suse.com/1012382
   https://bugzilla.suse.com/1064232
   https://bugzilla.suse.com/1068032
   https://bugzilla.suse.com/1087081
   https://bugzilla.suse.com/1089343
   https://bugzilla.suse.com/1098016
   https://bugzilla.suse.com/1099924
   https://bugzilla.suse.com/1100416
   https://bugzilla.suse.com/1100418
   https://bugzilla.suse.com/1103119