File _patchinfo of Package patchinfo.7411

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File _patchinfo of Package patchinfo.7411

<patchinfo incident="7411">
  <issue id="1056427" tracker="bnc">Allow disabling PV spinlocks in KVM like in Xen</issue>
  <issue id="1068032" tracker="bnc">VUL-0: speculative side channel attacks on various CPU platforms aka "SpectreAttack" and "MeltdownAttack"</issue>
  <issue id="1075087" tracker="bnc">[CVE] Meltdown kernel fixes for POWER for SLES12 SP3</issue>
  <issue id="1080157" tracker="bnc">Spectre kernel fixes for POWER for SLES15</issue>
  <issue id="1091041" tracker="bnc">[CVE] Additional Meltdown kernel fixes for POWER for SLES12 SP3</issue>
  <issue id="1092289" tracker="bnc">VNIC: SLES 12 SP3 went to xmon when there is a B400FF01 (adapter reset) (POWER9/P9)</issue>
  <issue id="1087082" tracker="bnc">VUL-0: EMBARGOED: CVE-2018-3639: V4 – Speculative Store Bypass aka "Memory Disambiguation"</issue>
  <issue id="1093215" tracker="bnc">prctl(PR_SPEC_STORE_BYPASS) never returns to userspace</issue>
  <issue id="1090953" tracker="bnc">llseek(.., .., SEEK_DATA) returns wrong offset on ext3/4 - [kiwi] XFS reports file system corruption</issue>
  <issue id="1094019" tracker="bnc">XEN: sles11sp3ltss PV guests can not boot after latest kernel update</issue>
  <issue id="2018-3639" tracker="cve" />
  <category>security</category>
  <rating>important</rating>
  <packager>morbidrsa</packager>
  <reboot_needed/>
  <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).
</description>
<summary>Security update for the Linux Kernel</summary>
</patchinfo>

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