bpftool, kernel, perf, python security update

CentOS Errata and Security Advisory CESA-2020:5437

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt (CVE-2020-14385)

• kernel: The flow_dissector feature allows device tracking (CVE-2019-18282)

• kernel: Buffer over-read in crypto_authenc_extractkeys() when a payload longer than 4 bytes is not aligned. (CVE-2020-10769)

• kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

• kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)

• kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

• kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)

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):

• WARNING in set_restore_sigmask at ./arch/x86/include/asm/thread_info.h:298 sigsuspend+0x6d/0x70 (BZ#1704650)

• [i40e] VFs see other VF’s outgoing traffic (BZ#1845677)

• [Hyper-V][RHEL7] Two fixes for kdump over network (BZ#1846667)

• Loop in __run_timers() because base->timer_jiffies is very far behind causes a lockup condition. (BZ#1849716)

• XFS transaction overrun when running docker on VMWARE (overlay fs) (BZ#1857203)

• RHEL 7.9 NVMe/IB - Host crash encountered during array upgrade (BZ#1857397)

• False positive hard lockup detected while disabling the hard lockup detector via sysctl -w kernel.watchdog=0 (BZ#1860661)

• [Hyper-V][RHEL-7] Only notify Hyper-V for die events that are oops (BZ#1868130)

• Linux kernel crash due to openvswitch module (BZ#1869190)

• ‘nodfs’ option not working when using SMB2+ (BZ#1873033)

• RHEL7.7 zstream - ESS - kernel panic triggered by freelist pointer corruption (BZ#1873189)

• destroy_cfs_bandwidth() is called by free_fair_sched_group() without calling init_cfs_bandwidth() (BZ#1878000)

• NULL pointer at nvme_rdma_setup_ctrl+0x1c2/0x8d0 [nvme_rdma] when discover E5700 (BZ#1878950)

• IB Infiniband RDMA mlx5_ib is freeing a kmalloc-512 cache that it does not own causing memory corruption. (BZ#1880184)

• [Azure][RHEL7] Two Patches Needed To Enable Azure Host Time-syncing in VMs (BZ#1884735)

• connect AF_UNSPEC on a connecting AF_INET6 socket returns an error (BZ#1886305)

• Rebuilding the grub with the CPU flag ‘avx’ disabled (clearcpuid=156) triggers kernel panic in xor_avx_2() (BZ#1886792)

• nf_conntrack_sctp.h is not usable due to a missing commit (BZ#1887975)

• Starting pvmove on top of physical volumes on MD devices causes IO error on ongoing IO (BZ#1890059)

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2020-December/086032.html

Affected packages:
bpftool
kernel
kernel-abi-whitelists
kernel-debug
kernel-debug-devel
kernel-devel
kernel-doc
kernel-headers
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python-perf

Upstream details at:
https://access.redhat.com/errata/RHSA-2020:5437