(RHSA-2021:4056) 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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)

• kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)

• kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)

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):

• [HPE 8.3 bug] No EDAC MC0 message with one-DIMM two-processor configuration under RHEL8.3 (BZ#1982182)

• mlx: devlink port function shows all zero hw_addr (BZ#1986837)

• net/sched: act_mirred: allow saving the last chain processed on xmit path (BZ#1992230)

• RHEL8.3 - System hang and / or r/o fs during SVC/v5k/v7k maintenance with ibmvfc (BZ#1993892)

• RHEL8.1 Snapshot3 - PVT:940:virt:4TB:LPM operation failed by returning HSCLA2CF, HSCL365C SRC’s - Linux partition suspend timeout (-> documentation/Linux Alert through LTC bug 182549) (BZ#1993952)

• RHEL8.4 - benchTableRepDMLAsyncBarrier regresses by 34% on RHEL8.4 on POWER9 compared to RHEL8.2 (performance) (BZ#1997431)

• [panic] call trace: ice_probe+0x238/0x10f0 [ice] (BZ#1997539)

• [ice, PTP] ice: fix GPIO 1PPS signal (BZ#1997572)

• Fix locality handling in the tpm_tis driver (BZ#1998219)

• [ice, PTP]: fix Tx queue iteration for Tx timestamp enablement (BZ#2000128)

• PCI passthrough with NVidia GPU “Invalid device 0003:01:00.0 iommu_group file /sys/bus/pci/devices/0003:01:00.0/iommu_group is not a symlink” (BZ#2000602)

• [DELL 8.4 BUG] - System Hangs at Dell Logo When Boot to OS(e1000e with wrong GbE checksum) (BZ#2002335)

• RHEL8.4 - kernel: Fix hanging ioctl caused by wrong msg counter (BZ#2002635)

• kernel: get_timespec64 does not ignore padding in compat syscalls (BZ#2003569)

• [mlx5] eth0: hw csum failure (BZ#2005980)

• xlog_grant_head_wait() does not return and system hangs (BZ#2007413)

• panic while breaking a lease/delegation after user mode helper invocation (BZ#2010331)

• Lockd invalid cast to nlm_lockowner (BZ#2010820)

• [xfstests generic/388] XFS: Assertion failed: 0, file: fs/xfs/xfs_mount.c, line: 1218 (BZ#2011919)

Enhancement(s):

• [Intel 8.5 FEAT] ice: Enable PTP Support (BZ#1998220)

• [Intel 8.5 FEAT] ice: Enable GPIO/SDP Support (BZ#1998221)