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Kernel security update: Virtuozzo ReadyKernel patch 88.1 for Virtuozzo 7.0 and Virtuozzo Infrastructure Platform 2.5, 3.0

Issue date: 2019-10-02

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

Virtuozzo Advisory ID: VZA-2019-078

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to the kernels 3.10.0-693.21.1.vz7.46.7 (Virtuozzo 7.0.7 HF2), 3.10.0-693.21.1.vz7.48.2 (Virtuozzo 7.0.7 HF3), 3.10.0-862.9.1.vz7.63.3 (Virtuozzo 7.0.8), 3.10.0-862.11.6.vz7.64.7 (Virtuozzo 7.0.8 HF1), 3.10.0-862.20.2.vz7.73.24 (Virtuozzo 7.0.9 and Virtuozzo Infrastructure Platform 2.5), 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).

2. Security Fixes

  • [Moderate] [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.86.2] megaraid_sas: potential kernel crash due to a NULL pointer dereference in megasas_free_cmds(). A flaw was found in ‘megaraid_sas’ kernel module. NULL pointer dereference can occur in megasas_free_cmds() function due incorrect error handling in megasas_alloc_cmds(). An attacker could exploit this to trigger a kernel crash. (CVE-2019-11810)

3. Bug Fixes

  • [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Kernel complained about busy inodes after unmount of NFS shares and crashed in certain cases. (PSBM-95177)

  • [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Data corruption in the EXT4 file system when truncating the extent index blocks. (PSBM-96719)

  • [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] memcg: race condition between reparenting and kmem uncharging. It was discovered that a race condition was possible between kmem uncharging and mem_cgroup_reparent_charges(). A kernel warning would be triggered as a result. (PSBM-97012)

  • [3.10.0-693.21.1.vz7.46.7 to 3.10.0-957.12.2.vz7.96.21] Kernel crashed in down_read() when a FUSE file system was exported via NFS. (PSBM-97905)

4. Installing the Update

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

Dec 12, 2024
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