(RHSA-2020:2667) Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body (CVE-2020-12657)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• [FJ8.2 Bug]: kernel: retrieving process core dump of the init process (PID 1) fails (BZ#1821377)

• Stand-alone CPU Linpack test reports bad residual on HPC Cluster node(s) while running RHEL 8 (BZ#1827618)

• missing version.h dependency for modpost may cause build to fail (BZ#1828228)

• RHEL8.2 Pre-Beta - net/ibmvnic: Fix typo in retry check (BZ#1828708)

• efi: kernel panic during ltp fs test - read_all -d /sys -q -r 10 (BZ#1829526)

• RHEL8.2 Beta - SMC-R connection with vlan-id fails (BZ#1830895)

• RHEL8.1 - RHEL8.1 kernel 4.18.0-147.3.1.el8.bz181950_test001.ppc64le+debug failed during LPM test (p8/p9):idahop08:LPM (vtpm) (BZ#1831663)

• s390/pci: fix bugs related to MIO instruction usage (BZ#1834690)

• RHEL8.2 Alpha - ISST-LTE:PowerVM: vNIC DLPAR crashes the LPAR (ibmvnic) (BZ#1836232)

• kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840685)

• [Hyper-V][RHEL8.2] Update netvsc driver (BZ#1842485)

• block layer: update to v5.3 (BZ#1842872)

• netfilter: backports from upstream (BZ#1845041)