Virtuozzo ReadyKernel patch 136.0 for Virtuozzo Server 7.0, 7.5

Issue date: 2021-12-01

Applies to: Virtuozzo Server 7.0, Virtuozzo Server 7.5

Virtuozzo Advisory ID: VZA-2021-055

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a stability fix. The patch applies to all supported kernels of Virtuozzo Server 7.

[3.10.0-1062.12.1.vz7.131.10 to 3.10.0-1160.41.1.vz7.183.5] nfsd: memory corruption and kernel crash in nfsd4_lock. It was discovered that certain operations with locks on NFS could result in a memory corruption and kernel crash in nfsd4_lock(). Note that, although the patch prevents new issues of this kind, it cannot fix the corruptions that have already occurred. So, kernel crashes are still possible even within a few hours after the ReadyKernel update has been applied, but should disappear after the reboot of the affected nodes. (PSBM-134905)

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

The new and updated packages are listed in the JSON file.