RHSA-2021:0856: Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: Local buffer overflow in ctnetlinkparsetuplefilter in net/netfilter/nfconntracknetlink.c (CVE-2020-25211)</li> <li> kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)</li> <li> kernel: locking issue in drivers/tty/ttyjobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)</li> <li> kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)</li> <li> kernel: use-after-free in i915ppgttclose in drivers/gpu/drm/i915/i915gemgtt.c (CVE-2020-7053)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)</li> <li> kernel: use-after-free in read in vtdokdgkbioctl (CVE-2020-25656)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</li> <li> kernel: increase slab leak leads to DoS (CVE-2021-20265)</li> 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.<br>Bug Fix(es):<br><li> BUG: scheduling while atomic: memory allocation under spinlock in scsiregisterdevicehandler() (BZ#1619147)</li> <li> WARNING in iscsitfreecmd during recovery Abort (BZ#1784540)</li> <li> lpfc does not issue adisc to fcp-2 devices, does not respond to nvme targer that send an adisc. (BZ#1875961)</li> <li> Panic in semctlnolock.constprop.15+0x25b (BZ#1877264)</li> <li> [RHEL 7.7][md]Crash due to invalid pool workqueue pointer, work queue race (BZ#1889372)</li> <li> Guest crash on intel CPU with -cpu host,-spec-ctrl,+ibpb (BZ#1890669)</li> <li> RHEL7.9 - kernel/uv: handle length extension properly (BZ#1899172)</li> <li> Commit b144f013fc16a06d7a4b9a4be668a3583fafeda2 'i40e: don't report link up for a VF who hasn't enabled queues' introducing issues with VM using DPDK (BZ#1901064)</li> <li> writing to /sys/devices/(...)/net/eno49/queues/tx-16/xpscpus triggers kernel panic (BZ#1903819)</li> <li> [Hyper-V][RHEL-7.9]video: hypervfb: Fix the cache type when mapping the VRAM Edit (BZ#1908896)</li> <li> kvm-rhel7.9 [AMD] - system crash observed while powering on virtual machine with attached VF interfaces. (BZ#1909036)</li> <li> kernel: nvme nvme7: Connect command failed, error wo/DNR bit: 2 (BZ#1910817)</li> <li> dm-mirror crashes from assuming underlying storage will have a non-NULL mergebvecfn (BZ#1916407)</li> <li> watchdog: use nmi registers snapshot in hardlockup handler (BZ#1916589)</li> <li> [DELL EMC 7.9 BUG] - Intel E810 NIC interfaces are not functional in RHEL 7.9 on system with AMD Rome CPUs (BZ#1918273)</li> <li> [DELL EMC BUG] RHEL system log shows AMD-Vi error when system connected with Gen 4 NVMe drives. (BZ#1921187)</li>