Security update for the Linux Kernel

SUSE Security Update: Security update for the Linux Kernel
Announcement ID: SUSE-SU-2018:1377-1
Rating: important
References: #1056427 #1068032 #1075087 #1080157 #1087082 #1090953 #1091041 #1092289 #1093215 #1094019
Affected Products:
  • SUSE OpenStack Cloud 7
  • SUSE Linux Enterprise Server for SAP 12-SP2
  • SUSE Linux Enterprise Server 12-SP2-LTSS
  • SUSE Linux Enterprise High Availability 12-SP2
  • SUSE Enterprise Storage 4
  • OpenStack Cloud Magnum Orchestration 7

  • An update that solves one vulnerability and has 9 fixes is now available.

    Description:



    The SUSE Linux Enterprise 12 SP2 LTSS kernel was updated to receive
    various security and bugfixes.

    The following security bug was fixed:

    - CVE-2018-3639: Information leaks using "Memory Disambiguation" feature
    in modern CPUs were mitigated, aka "Spectre Variant 4" (bnc#1087082).

    A new boot commandline option was introduced,
    "spec_store_bypass_disable", which can have following values:

    - auto: Kernel detects whether your CPU model contains an implementation
    of Speculative Store Bypass and picks the most appropriate mitigation.
    - on: disable Speculative Store Bypass
    - off: enable Speculative Store Bypass
    - prctl: Control Speculative Store Bypass per thread via prctl.
    Speculative Store Bypass is enabled for a process by default. The
    state of the control is inherited on fork.
    - seccomp: Same as "prctl" above, but all seccomp threads will disable
    SSB unless they explicitly opt out.

    The default is "seccomp", meaning programs need explicit opt-in into the
    mitigation.

    Status can be queried via the
    /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file, containing:

    - "Vulnerable"
    - "Mitigation: Speculative Store Bypass disabled"
    - "Mitigation: Speculative Store Bypass disabled via prctl"
    - "Mitigation: Speculative Store Bypass disabled via prctl and seccomp"

    The following related and non-security bugs were fixed:

    - cpuid: Fix cpuid.edx.7.0 propagation to guest
    - ext4: Fix hole length detection in ext4_ind_map_blocks() (bsc#1090953).
    - ibmvnic: Clean actual number of RX or TX pools (bsc#1092289).
    - kvm: Introduce nopvspin kernel parameter (bsc#1056427).
    - kvm: Fix nopvspin static branch init usage (bsc#1056427).
    - powerpc/64: Use barrier_nospec in syscall entry (bsc#1068032,
    bsc#1080157).
    - powerpc/64s: Add barrier_nospec (bsc#1068032, bsc#1080157).
    - powerpc/64s: Add support for ori barrier_nospec patching (bsc#1068032,
    bsc#1080157).
    - powerpc/64s: Enable barrier_nospec based on firmware settings
    (bsc#1068032, bsc#1080157).
    - powerpc/64s: Enhance the information in cpu_show_meltdown()
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/64s: Enhance the information in cpu_show_spectre_v1()
    (bsc#1068032).
    - powerpc/64s: Fix section mismatch warnings from setup_rfi_flush()
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/64s: Move cpu_show_meltdown() (bsc#1068032, bsc#1075087,
    bsc#1091041).
    - powerpc/64s: Patch barrier_nospec in modules (bsc#1068032, bsc#1080157).
    - powerpc/64s: Wire up cpu_show_spectre_v1() (bsc#1068032, bsc#1075087,
    bsc#1091041).
    - powerpc/64s: Wire up cpu_show_spectre_v2() (bsc#1068032, bsc#1075087,
    bsc#1091041).
    - powerpc/powernv: Set or clear security feature flags (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc/powernv: Use the security flags in pnv_setup_rfi_flush()
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc/pseries: Fix clearing of security feature flags (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc/pseries: Restore default security feature flags on setup
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/pseries: Set or clear security feature flags (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/rfi-flush: Always enable fallback flush on pseries (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc/rfi-flush: Differentiate enabled and patched flush types
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
    (bsc#1068032, bsc#1075087, bsc#1091041).
    - powerpc: Add security feature flags for Spectre/Meltdown (bsc#1068032,
    bsc#1075087, bsc#1091041).
    - powerpc: Move default security feature flags (bsc#1068032, bsc#1075087,
    bsc#1091041).
    - powerpc: Use barrier_nospec in copy_from_user() (bsc#1068032,
    bsc#1080157).

    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 OpenStack Cloud 7:
      zypper in -t patch SUSE-OpenStack-Cloud-7-2018-956=1
    • SUSE Linux Enterprise Server for SAP 12-SP2:
      zypper in -t patch SUSE-SLE-SAP-12-SP2-2018-956=1
    • SUSE Linux Enterprise Server 12-SP2-LTSS:
      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-956=1
    • SUSE Linux Enterprise High Availability 12-SP2:
      zypper in -t patch SUSE-SLE-HA-12-SP2-2018-956=1
    • SUSE Enterprise Storage 4:
      zypper in -t patch SUSE-Storage-4-2018-956=1
    • OpenStack Cloud Magnum Orchestration 7:
      zypper in -t patch SUSE-OpenStack-Cloud-Magnum-Orchestration-7-2018-956=1

    Package List:

    • SUSE OpenStack Cloud 7 (s390x x86_64):
      • kernel-default-4.4.121-92.80.1
      • kernel-default-base-4.4.121-92.80.1
      • kernel-default-base-debuginfo-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1
      • kernel-default-devel-4.4.121-92.80.1
      • kernel-syms-4.4.121-92.80.1
    • SUSE OpenStack Cloud 7 (noarch):
      • kernel-devel-4.4.121-92.80.1
      • kernel-macros-4.4.121-92.80.1
      • kernel-source-4.4.121-92.80.1
    • SUSE OpenStack Cloud 7 (x86_64):
      • kgraft-patch-4_4_121-92_80-default-1-3.5.2
    • SUSE OpenStack Cloud 7 (s390x):
      • kernel-default-man-4.4.121-92.80.1
    • SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):
      • kernel-default-4.4.121-92.80.1
      • kernel-default-base-4.4.121-92.80.1
      • kernel-default-base-debuginfo-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1
      • kernel-default-devel-4.4.121-92.80.1
      • kernel-syms-4.4.121-92.80.1
    • SUSE Linux Enterprise Server for SAP 12-SP2 (noarch):
      • kernel-devel-4.4.121-92.80.1
      • kernel-macros-4.4.121-92.80.1
      • kernel-source-4.4.121-92.80.1
    • SUSE Linux Enterprise Server for SAP 12-SP2 (x86_64):
      • kgraft-patch-4_4_121-92_80-default-1-3.5.2
    • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le s390x x86_64):
      • kernel-default-4.4.121-92.80.1
      • kernel-default-base-4.4.121-92.80.1
      • kernel-default-base-debuginfo-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1
      • kernel-default-devel-4.4.121-92.80.1
      • kernel-syms-4.4.121-92.80.1
    • SUSE Linux Enterprise Server 12-SP2-LTSS (noarch):
      • kernel-devel-4.4.121-92.80.1
      • kernel-macros-4.4.121-92.80.1
      • kernel-source-4.4.121-92.80.1
    • SUSE Linux Enterprise Server 12-SP2-LTSS (x86_64):
      • kgraft-patch-4_4_121-92_80-default-1-3.5.2
    • SUSE Linux Enterprise Server 12-SP2-LTSS (s390x):
      • kernel-default-man-4.4.121-92.80.1
    • SUSE Linux Enterprise High Availability 12-SP2 (ppc64le s390x x86_64):
      • cluster-md-kmp-default-4.4.121-92.80.1
      • cluster-md-kmp-default-debuginfo-4.4.121-92.80.1
      • cluster-network-kmp-default-4.4.121-92.80.1
      • cluster-network-kmp-default-debuginfo-4.4.121-92.80.1
      • dlm-kmp-default-4.4.121-92.80.1
      • dlm-kmp-default-debuginfo-4.4.121-92.80.1
      • gfs2-kmp-default-4.4.121-92.80.1
      • gfs2-kmp-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1
      • ocfs2-kmp-default-4.4.121-92.80.1
      • ocfs2-kmp-default-debuginfo-4.4.121-92.80.1
    • SUSE Enterprise Storage 4 (noarch):
      • kernel-devel-4.4.121-92.80.1
      • kernel-macros-4.4.121-92.80.1
      • kernel-source-4.4.121-92.80.1
    • SUSE Enterprise Storage 4 (x86_64):
      • kernel-default-4.4.121-92.80.1
      • kernel-default-base-4.4.121-92.80.1
      • kernel-default-base-debuginfo-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1
      • kernel-default-devel-4.4.121-92.80.1
      • kernel-syms-4.4.121-92.80.1
      • kgraft-patch-4_4_121-92_80-default-1-3.5.2
    • OpenStack Cloud Magnum Orchestration 7 (x86_64):
      • kernel-default-4.4.121-92.80.1
      • kernel-default-debuginfo-4.4.121-92.80.1
      • kernel-default-debugsource-4.4.121-92.80.1

    References: