Kernel update: Virtuozzo ReadyKernel patch 100.0 for Virtuozzo 7.0, Virtuozzo Infrastructure Platform 3.0 and Virtuozzo Hybrid Infrastructure 3.5

Issue date: 2020-03-17

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

Virtuozzo Advisory ID: VZA-2020-020

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a stability fix. The patch applies to the kernels 3.10.0-957.12.2.vz7.96.21 (Virtuozzo 7.0.11 and Virtuozzo Infrastructure Platform 3.0), 3.10.0-1062.4.2.vz7.116.7 (Virtuozzo 7.0.12 HF1 and Virtuozzo Hybrid Infrastructure 3.5).

2. Bug Fixes

  • [3.10.0-957.12.2.vz7.96.21 to 3.10.0-1062.4.2.vz7.116.7] ploop: potential corruption of the index during discard operation. A race condition was discovered in ploop, which could lead to corruption of the index during discard operations in certain cases. NOTE: It is not recommended to manually unload the ReadyKernel patch with the fix for this issue while any discard operations for ploop images are in progress: the ploop images could be corrupted as a result. Upgrading the patch is OK, only manual unloads and downgrades can be problematic. (PSBM-101823)

3. Installing the Update

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