RHSA-2019:3055: Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: Use-after-free in blkdrainqueue() function in block/blk-core.c (CVE-2018-20856)</li> <li> kernel: Heap overflow in mwifiexupdatebssdescwithie function in marvell/mwifiex/scan.c (CVE-2019-3846)</li> <li> hardware: bluetooth: BR/EDR encryption key negotiation attacks (KNOB) (CVE-2019-9506)</li> <li> kernel: Heap overflow in mwifiexuapparsetailies function in drivers/net/wireless/marvell/mwifiex/ie.c (CVE-2019-10126)</li> 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.<br>Bug Fixes:<br><li> gfs2: Fix iomap write page reclaim deadlock (BZ#1737373)</li> <li> [FJ7.6 Bug]: [REG] kernel: ipc: ipcfree should use kvfree (BZ#1740178)</li> <li> high updatecfsrqblockedload contention (BZ#1740180)</li> <li> [Hyper-V][RHEL 7] kdump fails to start on a Hyper-V guest of Windows Server 2019. (BZ#1740188)</li> <li> kvm: backport cpuidle-haltpoll driver (BZ#1740192)</li> <li> Growing unreclaimable slab memory (BZ#1741920)</li> <li> [bnx2x] ping failed from pf to vf which has been attached to vm (BZ#1741926)</li> <li> [Hyper-V]vPCI devices cannot allocate IRQs vectors in a Hyper-V VM with &gt; 240 vCPUs (i.e., when in x2APIC mode) (BZ#1743324)</li> <li> Macsec: inbound MACSEC frame is unexpectedly dropped with InPktsNotValid (BZ#1744442)</li> <li> RHEL 7.7 Beta - Hit error when trying to run nvme connect with IPv6 address (BZ#1744443)</li> <li> RHEL 7.6 SS4 - Paths lost when running straight I/O on NVMe/RoCE system (BZ#1744444)</li> <li> NFSv4.0 client sending a double CLOSE (leading to EIO application failure) (BZ#1744946)</li> <li> [Azure] CRI-RDOS | [RHEL 7.8] Live migration only takes 10 seconds, but the VM was unavailable for 2 hours (BZ#1748239)</li> <li> NFS client autodisconnect timer may fire immediately after TCP connection setup and may cause DoS type reconnect problem in complex network environments (BZ#1749290)</li> <li> [Inspur] RHEL7.6 ASPEED graphic card display issue (BZ#1749296)</li> <li> Allows macvlan to operated correctly over the active-backup mode to support bonding events. (BZ#1751579)</li> <li> [LLNL 7.5 Bug] slab leak causing a crash when using kmem control group (BZ#1752421)</li> Users of kernel are advised to upgrade to these updated packages, which fix these bugs.