Kernel update: Virtuozzo ReadyKernel patch 118.1 for Virtuozzo Hybrid Server 7.0, Virtuozzo Infrastructure Platform 3.0, and Virtuozzo Hybrid Infrastructure 3.5, 4.0

Issue date: 2020-11-09

Applies to: Virtuozzo Hybrid Infrastructure 3.5, Virtuozzo Hybrid Infrastructure 4.0, Virtuozzo Hybrid Server 7.0, Virtuozzo Infrastructure Platform 3.0

Virtuozzo Advisory ID: VZA-2020-066

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with stability fixes. The patch applies to all supported kernels of Virtuozzo Hybrid Server 7.0, Virtuozzo Infrastructure Platform, and Virtuozzo Hybrid Infrastructure.

2. Bug Fixes

  • [3.10.0-1127.8.2.vz7.151.14 to 3.10.0-1127.8.2.vz7.158.8] ‘ploop snapshot’ operation could hang in certain cases. (PSBM-121135)

  • [3.10.0-957.10.1.vz7.85.17 to 3.10.0-1127.8.2.vz7.158.8] Processes being killed by the OOM killer could continue consuming memory. If a process running in a container performed large allocations of kernel memory, this could hit the memory limit for the container and trigger the OOM killer. It was discovered, however, that the process being killed by it could continue consuming memory for some time. This could lead to out of memory conditions on the host. (PSBM-121523)

  • [3.10.0-957.12.2.vz7.96.21 to 3.10.0-1127.8.2.vz7.158.8] ‘ploop grow’ operation could fail in certain cases if the ploop image file contained holes. (PSBM-121772)

  • [3.10.0-957.10.1.vz7.85.17 to 3.10.0-1127.8.2.vz7.158.8] nfsd: Potential kernel crash in nfs4_put_stid(). (PSBM-121833)

3. Installing the Update

Download, install, and immediately apply the patch to the current kernel by running ‘readykernel update’.