Kernel update: Virtuozzo ReadyKernel patch 107.0 for Virtuozzo 7.0, Virtuozzo Infrastructure Platform 2.5, 3.0 and Virtuozzo Infrastructure 3.5

Issue date: 2020-06-01

Applies to: Virtuozzo 7.0, Virtuozzo Infrastructure Platform 2.5, Virtuozzo Infrastructure Platform 3.0, Virtuozzo Infrastructure 3.5

Virtuozzo Advisory ID: VZA-2020-040

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with stability fixes. The patch applies to the kernels 3.10.0-862.20.2.vz7.73.29 (Virtuozzo 7.0.9 and Virtuozzo Infrastructure Platform 2.5), 3.10.0-957.10.1.vz7.85.17 (Virtuozzo 7.0.10), 3.10.0-957.12.2.vz7.86.2 (Virtuozzo 7.0.10 HF1), 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 Infrastructure 3.5), 3.10.0-1062.12.1.vz7.131.10 (Virtuozzo 7.0.13).

2. Bug Fixes

[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1062.12.1.vz7.131.10] memcg: kernel could crash when memory was uncharged from a cgroup while the cgroup was going offline. It was found that a race was possible between uncharging memory from a cgroup and making that cgroup offline. This could lead to premature destruction of the cgroup and could cause a kernel crash. (PSBM-103975)
[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1062.12.1.vz7.131.10] netlink: performance issues due to direct memory reclaim in netlink_dump() and netlink_trim(). (PSBM-104086)
[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1062.12.1.vz7.131.10] ext4: attempts to freeze the FS could hang in certain cases due to an unbalanced internal write counter. (PSBM-104342)
[3.10.0-862.20.2.vz7.73.29 to 3.10.0-1062.12.1.vz7.131.10] nf_conntrack: potential kernel crash in netlink_has_listeners(). (PSBM-104387)

3. Installing the Update

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

4. References

The JSON file with the list of new and updated packages is available at JSON file.