(RHSA-2020:3019) Important: kernel security, bug fix, and enhancement update

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

Security Fix(es):

• Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)

• kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call (CVE-2019-13648)

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):

• kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840678)

• Deadlock condition grabbing ssb_state lock (BZ#1841120)

• ext4: change LRU to round-robin in extent status tree shrinker (BZ#1847342)

• Emulex lpfc seems to get hung up failing IOCB’S continuously on kernel 3.10.0-957.21.3.el7.x86_64 leading to Oracle evictions (BZ#1849650)

• After upgrade to 3.9.89 pod containers with CPU limits fail to start due to cgroup error (BZ#1850499)

Enhancement(s):

• [Marvell 7.8 FEAT] Update bnx2fc driver to latest upstream (BZ#1834817)