RHSA-2021:2725: 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: sizet-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909) kernel: use-after-free in net/bluetooth/hcievent.c when destroying an hcichan (CVE-2021-33034) kernel: use-after-free in shownumastats function (CVE-2019-20934) kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlinkcit.c (CVE-2020-11668) kernel: use-after-free in cipsov4genopt in net/ipv4/cipsoipv4.c (CVE-2021-33033) 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): [RHEL7.9.z] nttyopen: "BUG: unable to handle kernel paging request" (BZ#1872778) [ESXi][RHEL7.8]"qpallochypercall result = -20" / "Could not attach to queue pair with -20" with vSphere Fault Tolerance enabled (BZ#1892237) [RHEL7.9][s390x][Regression] Sino Nomine swapgen IBM z/VM emulated DASD with DIAG driver returns EOPNOTSUPP (BZ#1910395) False-positive hard lockup detected while processing the thread state information (SysRq-T) (BZ#1912221) RHEL7.9 zstream - s390x LPAR with NVMe SSD will panic when it has 32 or more IFL (pci) (BZ#1917943) The NMI watchdog detected a hard lockup while printing RCU CPU stall warning messages to the serial console (BZ#1924688) nvme hangs when trying to allocate reserved tag (BZ#1926825) [REGRESSION] "call into AER handling regardless of severity" triggers dorecovery() unnecessarily on correctable PCIe errors (BZ#1933663) Module nvmecore: A double free of the kmalloc-512 cache between nvmetranslogtemperature() and nvmegetlogpage(). (BZ#1946793) sctp - SCTPCMDTIMERSTART queues active timer kernel BUG at kernel/timer.c:1000! (BZ#1953052) [Hyper-V][RHEL-7]When CONFIGNETPOLLCONTROLLER is set, mainline commit 2a7f8c3b1d3fee is needed (BZ#1953075) Kernel panic at cgroupisdescendant (BZ#1957719) [Hyper-V][RHEL-7]Commits To Fix Kdump Failures (BZ#1957803) IGMPv2 JOIN packets incorrectly routed to loopback (BZ#1958339) [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1960193) mlx4: Fix memory allocation in mlx4buddyinit needed (BZ#1962406) incorrect assertion on pistate->pimutex.waitlock from pistateupdateowner() (BZ#1965495)