SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:1368-1
Rating:             important
References:         #1046610 #1052943 #1068032 #1075087 #1075088 
                    #1080157 #1084760 #1087082 #1087092 #1089895 
                    #1090630 #1090888 #1091041 #1091671 #1091755 
                    #1091815 #1092372 #1092497 #1094019 
Cross-References:   CVE-2017-5715 CVE-2017-5753 CVE-2018-1000199
                    CVE-2018-10675 CVE-2018-3639
Affected Products:
                    SUSE Linux Enterprise Software Development Kit 11-SP4
                    SUSE Linux Enterprise Server 11-SP4
                    SUSE Linux Enterprise Server 11-EXTRA
                    SUSE Linux Enterprise Debuginfo 11-SP4
______________________________________________________________________________

   An update that solves 5 vulnerabilities and has 14 fixes is
   now available.

Description:



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

   The following security bugs were 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"

   - CVE-2018-1000199: An address corruption flaw was discovered while
     modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an
     unprivileged user/process could use this flaw to crash the system kernel
     resulting in DoS OR to potentially escalate privileges on a the system.
     (bsc#1089895)
   - CVE-2018-10675: The do_get_mempolicy function in mm/mempolicy.c allowed
     local users to cause a denial of service (use-after-free) or possibly
     have unspecified other impact via crafted system calls (bnc#1091755).
   - CVE-2017-5715: The retpoline mitigation for Spectre v2 has been enabled
     also for 32bit x86.
   - CVE-2017-5753: Spectre v1 mitigations have been improved by the versions
     merged from the upstream kernel.

   The following non-security bugs were fixed:

   - Avoid quadratic search when freeing delegations (bsc#1084760).
   - cifs: fix crash due to race in hmac(md5) handling (bsc#1091671).
   - hid: roccat: prevent an out of bounds read in
     kovaplus_profile_activated() (bsc#1087092).
   - mmc: jz4740: Fix race condition in IRQ mask update (bsc#1090888).
   - powerpc/64: Disable gmb() on powerpc
   - 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#1075088, bsc#1091815).
   - 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: Improve RFI L1-D cache flush fallback (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/64s: Move cpu_show_meltdown() (bsc#1068032, bsc#1075088,
     bsc#1091815).
   - powerpc/64s: Patch barrier_nospec in modules (bsc#1068032, bsc#1080157).
   - powerpc/64s: Wire up cpu_show_spectre_v1() (bsc#1068032, bsc#1075088,
     bsc#1091815).
   - powerpc/64s: Wire up cpu_show_spectre_v2() (bsc#1068032, bsc#1075088,
     bsc#1091815).
   - powerpc/64: Use barrier_nospec in syscall entry (bsc#1068032,
     bsc#1080157).
   - powerpc: Add security feature flags for Spectre/Meltdown (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc: Move default security feature flags (bsc#1068032, bsc#1075088,
     bsc#1091815).
   - powerpc: Move local setup.h declarations to arch includes (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/pseries: Fix clearing of security feature flags (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/pseries: Restore default security feature flags on setup
     (bsc#1068032, bsc#1075088, bsc#1091815).
   - powerpc/pseries: Set or clear security feature flags (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()
     (bsc#1068032, bsc#1075088, bsc#1091815).
   - powerpc/rfi-flush: Always enable fallback flush on pseries (bsc#1068032,
     bsc#1075088, bsc#1091815).
   - powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration
     (bsc#1068032, bsc#1075088, bsc#1091815).
   - powerpc/rfi-flush: Differentiate enabled and patched flush types
     (bsc#1068032, bsc#1075088, bsc#1091815).
   - powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
     (bsc#1068032, bsc#1075088, bsc#1091815).
   - powerpc: Use barrier_nospec in copy_from_user() (bsc#1068032,
     bsc#1080157).
   - series.conf: fix the header It was corrupted back in 2015.
   - tracing: Create seq_buf layer in trace_seq (bsc#1091815).
   - Update config files. Enable retpolines for i386 build.
   - usb: Accept bulk endpoints with 1024-byte maxpacket (bsc#1090888).
   - usb: hub: fix SS hub-descriptor handling (bsc#1092372).
   - x86/bugs: correctly force-disable IBRS on !SKL systems (bsc#1092497).
   - x86/kaiser: export symbol kaiser_set_shadow_pgd() (bsc#1090630)
   - x86/xen: disable IBRS around CPU stopper function invocation
   - xen-netfront: fix req_prod check to avoid RX hang when index wraps
     (bsc#1046610).
   - xfs: fix buffer use after free on IO error (bsc#1052943).
   - xfs: prevent recursion in xfs_buf_iorequest (bsc#1052943).


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 Software Development Kit 11-SP4:

      zypper in -t patch sdksp4-kernel-20180512-13618=1

   - SUSE Linux Enterprise Server 11-SP4:

      zypper in -t patch slessp4-kernel-20180512-13618=1

   - SUSE Linux Enterprise Server 11-EXTRA:

      zypper in -t patch slexsp3-kernel-20180512-13618=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-kernel-20180512-13618=1



Package List:

   - SUSE Linux Enterprise Software Development Kit 11-SP4 (noarch):

      kernel-docs-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-SP4 (i586 ia64 ppc64 s390x x86_64):

      kernel-default-3.0.101-108.48.1
      kernel-default-base-3.0.101-108.48.1
      kernel-default-devel-3.0.101-108.48.1
      kernel-source-3.0.101-108.48.1
      kernel-syms-3.0.101-108.48.1
      kernel-trace-3.0.101-108.48.1
      kernel-trace-base-3.0.101-108.48.1
      kernel-trace-devel-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-SP4 (i586 x86_64):

      kernel-ec2-3.0.101-108.48.1
      kernel-ec2-base-3.0.101-108.48.1
      kernel-ec2-devel-3.0.101-108.48.1
      kernel-xen-3.0.101-108.48.1
      kernel-xen-base-3.0.101-108.48.1
      kernel-xen-devel-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-SP4 (ppc64):

      kernel-bigmem-3.0.101-108.48.1
      kernel-bigmem-base-3.0.101-108.48.1
      kernel-bigmem-devel-3.0.101-108.48.1
      kernel-ppc64-3.0.101-108.48.1
      kernel-ppc64-base-3.0.101-108.48.1
      kernel-ppc64-devel-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-SP4 (s390x):

      kernel-default-man-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-SP4 (i586):

      kernel-pae-3.0.101-108.48.1
      kernel-pae-base-3.0.101-108.48.1
      kernel-pae-devel-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-EXTRA (i586 ia64 ppc64 s390x x86_64):

      kernel-default-extra-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-EXTRA (i586 x86_64):

      kernel-xen-extra-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-EXTRA (x86_64):

      kernel-trace-extra-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-EXTRA (ppc64):

      kernel-ppc64-extra-3.0.101-108.48.1

   - SUSE Linux Enterprise Server 11-EXTRA (i586):

      kernel-pae-extra-3.0.101-108.48.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ia64 ppc64 s390x x86_64):

      kernel-default-debuginfo-3.0.101-108.48.1
      kernel-default-debugsource-3.0.101-108.48.1
      kernel-trace-debuginfo-3.0.101-108.48.1
      kernel-trace-debugsource-3.0.101-108.48.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ia64 s390x x86_64):

      kernel-default-devel-debuginfo-3.0.101-108.48.1
      kernel-trace-devel-debuginfo-3.0.101-108.48.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):

      kernel-ec2-debuginfo-3.0.101-108.48.1
      kernel-ec2-debugsource-3.0.101-108.48.1
      kernel-xen-debuginfo-3.0.101-108.48.1
      kernel-xen-debugsource-3.0.101-108.48.1
      kernel-xen-devel-debuginfo-3.0.101-108.48.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (ppc64):

      kernel-bigmem-debuginfo-3.0.101-108.48.1
      kernel-bigmem-debugsource-3.0.101-108.48.1
      kernel-ppc64-debuginfo-3.0.101-108.48.1
      kernel-ppc64-debugsource-3.0.101-108.48.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586):

      kernel-pae-debuginfo-3.0.101-108.48.1
      kernel-pae-debugsource-3.0.101-108.48.1
      kernel-pae-devel-debuginfo-3.0.101-108.48.1


References:

   https://www.suse.com/security/cve/CVE-2017-5715.html
   https://www.suse.com/security/cve/CVE-2017-5753.html
   https://www.suse.com/security/cve/CVE-2018-1000199.html
   https://www.suse.com/security/cve/CVE-2018-10675.html
   https://www.suse.com/security/cve/CVE-2018-3639.html
   https://bugzilla.suse.com/1046610
   https://bugzilla.suse.com/1052943
   https://bugzilla.suse.com/1068032
   https://bugzilla.suse.com/1075087
   https://bugzilla.suse.com/1075088
   https://bugzilla.suse.com/1080157
   https://bugzilla.suse.com/1084760
   https://bugzilla.suse.com/1087082
   https://bugzilla.suse.com/1087092
   https://bugzilla.suse.com/1089895
   https://bugzilla.suse.com/1090630
   https://bugzilla.suse.com/1090888
   https://bugzilla.suse.com/1091041
   https://bugzilla.suse.com/1091671
   https://bugzilla.suse.com/1091755
   https://bugzilla.suse.com/1091815
   https://bugzilla.suse.com/1092372
   https://bugzilla.suse.com/1092497
   https://bugzilla.suse.com/1094019