Important: kernel security and bug fix update (Oracle Linux 8)

[4.18.0-193.1.2_2.OL8]
- Oracle Linux certificates (Alexey Petrenko)
- Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list (olkmod_signing_key.pem) [Orabug: 29539237]
- Update x509.genkey [Orabug: 24817676]

[4.18.0-193.1.2_2]
- [net] netlabel: cope with NULL catmap (Paolo Abeni) [1827249 1827251] {CVE-2020-10711}
- [mm] s390/mm: fix page table upgrade vs 2ndary address mode accesses (Vladis Dronov) [1828153 1828154] {CVE-2020-11884}

[4.18.0-193.1.1_2]
- [x86] kvm: x86: clear stale x86_emulate_ctxt->intercept value (Jon Maloy) [1824398 1806817] {CVE-2020-2732}
- [x86] kvm: vmx: check descriptor table exits on instruction emulation (Jon Maloy) [1824398 1806817] {CVE-2020-2732}
- [x86] kvm: nvmx: Check IO instruction VM-exit conditions (Jon Maloy) [1824398 1806817] {CVE-2020-2732}
- [x86] kvm: nvmx: Refactor IO bitmap checks into helper function (Jon Maloy) [1824398 1806817] {CVE-2020-2732}
- [x86] kvm: nvmx: Don't emulate instructions in guest mode (Jon Maloy) [1824398 1806817] {CVE-2020-2732}
- [sound] ALSA: usb-audio: set the interface format after resume on Dell WD19 (Perry Yuan) [1821376 1807965]
- [kernel] sched: Avoid scale real weight down to zero (Phil Auld) [1819909 1808562]
- [netdrv] hv_netvsc: Fix unwanted rx_table reset (Mohammed Gamal) [1817945 1805950]
- [netdrv] hv_netvsc: Fix tx_table init in rndis_set_subchannel() (Mohammed Gamal) [1817945 1805950]
- [netdrv] hv_netvsc: Fix send_table offset in case of a host bug (Mohammed Gamal) [1817945 1805950]
- [netdrv] hv_netvsc: Fix offset usage in netvsc_send_table() (Mohammed Gamal) [1817945 1805950]