SUSE-SU-2018:1482-1

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

This update main focus is a regression fix in SystemV IPC handling. (bsc#1093600)

The following non-security bugs were fixed:

• Drop cBPF SSBD as classic BPF does not really have a proper concept of pointers, and without eBPF maps the out-of-bounds access in speculative execution branch can't be mounted. Moreoever, seccomp BPF uses only such a subset of BPF that can only do absolute indexing, and therefore seccomp data buffer boundarier can't be crossed. Information condensed from Alexei and Kees.
• ibrs used instead of retpoline on Haswell processor with spectre_v2=retpoline (bsc#1092497)
• ib/mlx4: Convert slave port before building address-handle (bug#919382 FATE#317529).
• KABI protect struct _lowcore (bsc#1089386).
• Update config files, add Spectre mitigation for s390x (bnc#1089386, LTC#166572).
• Update s390 config files (bsc#1089386).
• fanotify: fix logic of events on child (bsc#1013018).
• ipc/msg: Fix faulty parsing of msgctl args (bsc#1093600,bsc#1072689).
• ocfs2/dlm: Fix up kABI in dlm_ctxt (bsc#1070404).
• ocfs2/dlm: wait for dlm recovery done when migrating all lock resources (bsc#1013018).
• powerpc, KVM: Split HVMODE_206 cpu feature bit into separate HV and architecture bits (bsc#1087082).
• powerpc: Fix /proc/cpuinfo revision for POWER9 DD2 (FATE#325713, bsc#1093710).
• s390/cio: update chpid descriptor after resource accessibility event (bnc#1091659, LTC#167429).
• s390/dasd: fix IO error for newly defined devices (bnc#1091659, LTC#167398).
• s390/qdio: fix access to uninitialized qdio_q fields (bnc#1091659, LTC#168037).
• s390/qeth: on channel error, reject further cmd requests (bnc#1088343, LTC#165985).
• s390: add automatic detection of the spectre defense (bnc#1089386, LTC#166572).
• s390: add optimized array_index_mask_nospec (bnc#1089386, LTC#166572).
• s390: add sysfs attributes for spectre (bnc#1089386, LTC#166572).
• s390: correct module section names for expoline code revert (bsc#1089386).
• s390: correct nospec auto detection init order (bnc#1089386, LTC#166572).
• s390: do not bypass BPENTER for interrupt system calls (bnc#1089386, LTC#166572).
• s390: fix retpoline build on 31bit (bsc#1089386).
• s390: improve cpu alternative handling for gmb and nobp (bnc#1089386, LTC#166572).
• s390: introduce execute-trampolines for branches (bnc#1089386, LTC#166572).
• s390: move nobp parameter functions to nospec-branch.c (bnc#1089386, LTC#166572).
• s390: report spectre mitigation via syslog (bnc#1089386, LTC#166572).
• s390: run user space and KVM guests with modified branch prediction (bnc#1089386, LTC#166572).
• s390: scrub registers on kernel entry and KVM exit (bnc#1089386, LTC#166572).
• x86, mce: Fix mce_start_timer semantics (bsc#1090607).
• x86/kaiser: symbol kaiser_set_shadow_pgd() exported with non GPL