(RHSA-2020:0834) 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: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

• kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain upper-bound check, leading to a buffer overflow (CVE-2019-17666)

• Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135) (CVE-2019-19338)

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):

• RHEL7.7 - default idle mishandles lazy irq state (BZ#1767620)

• Sanitize MM backported code for RHEL7 (BZ#1768386)

• A bio with a flush and write to an md device can be lost and never complete by the md layer (BZ#1773482)

• [FJ7.7 Bug]: [REG] Read from /proc/net/if_inet6 never stop. (BZ#1778084)

• RHEL7.7 - zfcp: fix reaction on bit error threshold notification (BZ#1778691)

• RHEL7.7 Snapshot3 - Kernel Panic when running LTP mm test on s390x (BZ#1780035)

• Leak in cachefiles driver (BZ#1780149)

• VFS: Busy inodes after unmount of loop0 when encountering duplicate directory inodes (BZ#1781159)

• Allocation failure in md’s r10buf_pool_alloc function leads to a crash from accessing uninitialized pointers (BZ#1781584)

• [Hyper-V][RHEL7.6]Hyper-V guest waiting indefinitely for RCU callback when removing a mem cgroup (BZ#1783177)

• A bnx2fc abort attempt doesn’t timeout from miscalculation causing a huge timeout value (BZ#1784824)

• scsi: libiscsi: fall back to sendmsg for slab pages (BZ#1784826)

• RHEL7.7 - kernel: avoid cpu yield in SMT environment (BZ#1787558)

• RHEL7.6 - kernel: jump label transformation performance (BZ#1787559)

• drm radeon power management warning on VERDE cards (BZ#1789744)

• Duplicate enum value in include/linux/blk_types.h (BZ#1791781)

• [HPE 7.7 Bug] hpsa: bug fix for reset issue (BZ#1791782)

• System Crash on vport creation (NPIV on FCoE) (BZ#1791825)

• [Hyper-V][RHEL 7.8] Four Mellanox Patches needed for kernels that have that have SRIOV (BZ#1792371)

• WARNING: CPU: 7 PID: 2049 at mm/slub.c:2296 ___slab_alloc+0x508/0x520 (BZ#1793086)

• fio with ioengine=pmemblk on fsdax failed (BZ#1793088)

• [HPE 7.7 Bug] hpsa: bug fixes (BZ#1793579)

• perf top -p PID does not show anything (BZ#1793581)

• Delay in RT task scheduled. Incorrect nr_scheduled value. (BZ#1796261)

• A directory on a gfs2 filesystem appears corrupt on nodeB after nodeA renames the directory (BZ#1796431)

• ixgbevf interface goes down on hypervisor and causes outage (BZ#1796798)

• Can’t enable virt-ssbd on some AMD hosts (BZ#1797511)

• [HPEMC 7.8 BUG] x86/boot/64: Avoid mapping reserved ranges in early page tables (BZ#1798163)

Enhancement(s):

• scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show’ (BZ#1791595)