Security update for the Linux Kernel

Announcement ID:	SUSE-SU-2018:1377-1
Rating:	important
References:	bsc#1056427 bsc#1068032 bsc#1075087 bsc#1080157 bsc#1087082 bsc#1090953 bsc#1091041 bsc#1092289 bsc#1093215 bsc#1094019
Cross-References:	CVE-2018-3639
CVSS scores:	CVE-2018-3639 ( SUSE ): 4.3 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N CVE-2018-3639 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVE-2018-3639 ( NVD ): 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Products:	Magnum Orchestration 7 SUSE Enterprise Storage 4 SUSE Linux Enterprise High Availability Extension 12 SP2 SUSE Linux Enterprise High Performance Computing 12 SP2 SUSE Linux Enterprise High Performance Computing 12 SP3 SUSE Linux Enterprise High Performance Computing 12 SP4 SUSE Linux Enterprise High Performance Computing 12 SP5 SUSE Linux Enterprise Point of Service Image Server 12 12-SP2 SUSE Linux Enterprise Server 12 SP2 SUSE Linux Enterprise Server 12 SP2 LTSS 12-SP2 SUSE Linux Enterprise Server 12 SP3 SUSE Linux Enterprise Server 12 SP4 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE OpenStack Cloud 7

An update that solves one vulnerability and has nine security fixes can now be installed.

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).

Special Instructions and Notes:

• Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE 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
• Magnum Orchestration 7
  zypper in -t patch SUSE-OpenStack-Cloud-Magnum-Orchestration-7-2018-956=1
• SUSE Linux Enterprise High Availability Extension 12 SP2
  zypper in -t patch SUSE-SLE-HA-12-SP2-2018-956=1
• SUSE Linux Enterprise Server for SAP Applications 12 SP2
  zypper in -t patch SUSE-SLE-SAP-12-SP2-2018-956=1 SUSE-SLE-HA-12-SP2-2018-956=1
• SUSE Linux Enterprise Point of Service Image Server 12 12-SP2
  zypper in -t patch SUSE-SLE-POS-12-SP2-CLIENT-2018-956=1
• SUSE Linux Enterprise Server 12 SP2 LTSS 12-SP2
  zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-956=1
• SUSE Enterprise Storage 4
  zypper in -t patch SUSE-Storage-4-2018-956=1

Package List:

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

References:

• https://www.suse.com/security/cve/CVE-2018-3639.html
• https://bugzilla.suse.com/show_bug.cgi?id=1056427
• https://bugzilla.suse.com/show_bug.cgi?id=1068032
• https://bugzilla.suse.com/show_bug.cgi?id=1075087
• https://bugzilla.suse.com/show_bug.cgi?id=1080157
• https://bugzilla.suse.com/show_bug.cgi?id=1087082
• https://bugzilla.suse.com/show_bug.cgi?id=1090953
• https://bugzilla.suse.com/show_bug.cgi?id=1091041
• https://bugzilla.suse.com/show_bug.cgi?id=1092289
• https://bugzilla.suse.com/show_bug.cgi?id=1093215
• https://bugzilla.suse.com/show_bug.cgi?id=1094019