[USN-6152-1] Linux kernel (GKE) regression

Rodrigo Figueiredo Zaiden rodrigo.zaiden at canonical.com
Thu Jun 8 22:57:36 UTC 2023

Ubuntu Security Notice USN-6152-1
June 08, 2023

linux-gke regression

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS


The system could suffer with performance degradation in certain conditions.

Software Description:
- linux-gke: Linux kernel for Google Container Engine (GKE) systems


It was discovered that NFS client's access cache implementation in the
Linux kernel caused a severe NFS performance degradation in certain
conditions. This updated makes the NFS file-access stale cache behavior
to be optional.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1035-gke     5.15.0-1035.40

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1101-gke      5.4.0-1101.108

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.


Package Information:

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