[RHSA-2021:4140] kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):
* kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)
* kernel: Improper input validation in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24502)
* kernel: Insufficient access control in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24503)
* kernel: Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24504)
* kernel: Fragmentation cache not cleared on reconnection (CVE-2020-24586)
* kernel: Reassembling fragments encrypted under different keys (CVE-2020-24587)
* kernel: wifi frame payload being parsed incorrectly as an L2 frame (CVE-2020-24588)
* kernel: Forwarding EAPOL from unauthenticated wifi client (CVE-2020-26139)
* kernel: accepting plaintext data frames in protected networks (CVE-2020-26140)
* kernel: not verifying TKIP MIC of fragmented frames (CVE-2020-26141)
* kernel: accepting fragmented plaintext frames in protected networks (CVE-2020-26143)
* kernel: accepting unencrypted A-MSDU frames that start with RFC1042 header (CVE-2020-26144)
* kernel: accepting plaintext broadcast fragments as full frames (CVE-2020-26145)
* kernel: locking inconsistency in tty_io.c and tty_jobctrl.c can lead to a read-after-free (CVE-2020-29660)
* kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function via a long SSID value (CVE-2020-36158)
* kernel: slab out-of-bounds read in hci_extended_inquiry_result_evt() (CVE-2020-36386)
* kernel: Improper access control in BlueZ may allow information disclosure vulnerability. (CVE-2021-0129)
* kernel: Use-after-free in ndb_queue_rq() (CVE-2021-3348)
* kernel: Linux kernel eBPF RINGBUF map oversized allocation (CVE-2021-3489)
* kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)
* kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)
* kernel: eBPF 32-bit source register truncation on div/mod (CVE-2021-3600)
* kernel: DoS in rb_per_cpu_empty() (CVE-2021-3679)
* kernel: overlayfs: Mounting overlayfs inside an unprivileged user namespace can reveal files (CVE-2021-3732)
* kernel: heap overflow in __cgroup_bpf_run_filter_getsockopt() (CVE-2021-20194)
* kernel: Race condition in sctp_destroy_sock list_del (CVE-2021-23133)
* kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode (CVE-2021-28950)
* kernel: System crash in intel_pmu_drain_pebs_nhm (CVE-2021-28971)
* kernel: protection for sequences of pointer arithmetic operations against speculatively out-of-bounds loads can be bypassed to leak content of kernel memory (CVE-2021-29155)
* kernel: improper input validation in tipc_nl_retrieve_key function (CVE-2021-29646)
* kernel: lack a full memory barrier upon the assignment of a new table value in x_tables.h may lead to DoS (CVE-2021-29650)
* kernel: local escalation of privileges in handling of eBPF programs (CVE-2021-31440)
* kernel: protection of stack pointer against speculative pointer arithmetic can be bypassed to leak content of kernel memory (CVE-2021-31829)
* kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic operations by BPF verifier (CVE-2021-33200)
* kernel: reassembling encrypted fragments with non-consecutive packet numbers (CVE-2020-26146)
* kernel: reassembling mixed encrypted/plaintext fragments (CVE-2020-26147)
* kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check (CVE-2020-29368)
* kernel: flowtable list del corruption with kernel BUG (CVE-2021-3635)
* kernel: NULL pointer dereference in llsec_key_alloc() (CVE-2021-3659)
* kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure (CVE-2021-20239)
* kernel: out of bounds array access in drivers/md/dm-ioctl.c (CVE-2021-31916)