Release Notes: Milestone 69

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Current Status

Image Family cos-69-lts
Deprecated After Dec 11, 2019
Kernel 4.14.145
Kubernetes v1.11.8
Docker v17.03.2

Changelog (vs Milestone 68)


Date: Oct 08, 2019
  • Upgraded the Linux kernel to 4.14.145.
  • Backported a kernel patch to ensure the cfs cgroup quota/period ratio always stays the same. This addresses a Kubernetes issue where the pod cgroup could be changed into an inconsistent state.


Date: Aug 30, 2019
  • Backported upstream writeback patches to fix a Docker hung issue.


Date: Aug 08, 2019
  • Upgraded the Linux kernel to v4.14.137. This resolves CVE-2019-1125.


Date: Jul 12, 2019
  • Fixed vulnerability in app-arch/bzip2 (CVE-2019-12900).
  • Updated kernel to version v4.14.132.
  • Fixed an issue introduced by NFLX-2019-001 fixes.


Date: Jun 19, 2019
  • Updated the Linux kernel to version 4.14.127 to resolve the NFLX-2019-001 TCP SACK vulnerabilities.


Date: Jun 17, 2019
  • Updated kernel to version v4.14.124.


Date: May 28, 2019
  • Upgraded curl to v7.64.1 to fix CVE-2018-16890.
  • Cherry-picked upstream patch in kernel to fix a bug in lockd introduced by commit 01b79d20008d "lockd: Show pid of lockd for remote locks" in Linux kernel v4.14.105.
  • Rotated keys used by UEFI Secure Boot for signing and verifying the UEFI boot path.


Date: May 15, 2019
  • Merged Linux Stable Kernel 'v4.14.119' for resolving Microarchitectural Data Sampling (MDS) vulnerabilities (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091).
  • Mitigated a mount hang issue in the Linux kernel.


Date: Apr 11, 2019
  • Fixed slow access to /sys/fs/cgroup/memory/memory.stat. This resolves kubelet performance degradation.


Date: Apr 01, 2019
  • Included perf tool in the image.
  • Included sosreport in the image.
  • Updated the built-in kubelet to 1.11.8.
  • Fixed an issue where Shielded VM integrity measurements weren't being logged properly.
  • Merged Linux Stable Kernel 'v4.14.106'.


Date: Feb 28, 2019
  • Enabled kernel.softlockup_all_cpu_backtrace. This was previously disabled to mitigate a kernel deadlock issue, which is now resolved.
  • Configured docker.service by setting RestartSecs=10 to always restart Docker after 10 seconds.


Date: Jan 24, 2019
  • Backported the fix for a deadlock issue in kernel panic.
  • Merged Linux Stable Kernel 'v4.14.91'.


Date: Jan 10, 2019
  • Set CONFIG_BLK_WBT_MQ=y to improve performance isolation on persistent disks. This fixes a bug where writes on a SSD persistent disk can affect performance on the Standard persistent boot disk.
  • Cherry-picked Ext4 commits that address FS inconsistencies caused by disruptions during NFS CREATE operation under certain conditions.
  • Merged Linux Stable Kernel 'v4.14.89'.


Date: Dec 20, 2018
  • Disabled auto update on shielded images. Images in cos-cloud are not impacted by this change.
  • Enabled the "metadata_csum" ext4 feature on the stateful partition. This also improves performance of boot-disk resize operation.
  • Apply IMA Policy only when cloud-audit-setup.service is explicitly run.


Date: Nov 16, 2018
  • Updated kernel to v4.14.79.
  • Fixed the bug that cloud-init can't write gzipped files.


Date: Oct 29, 2018
  • Fixed an issue where an interaction between IMA and NFS could cause deadlock.
  • Fixed a stackdriver-logging.service issue observed in Containers on Compute Engine.
  • PCID is now enabled by default when supported by the CPU platform.


Date: Oct 11, 2018
  • Reset softlockup_all_cpu_backtrace to '0' to avoid kernel deadlock on high CPU machines under certain circumstances.


Date: Oct 1, 2018
  • Removed userspace headers from kernel header artifact.


Date: Sept 18, 2018
  • Promoted to Stable channel.
  • Backport a fix to ensure that scsi contributes to randomness when running rotational device . This addresses an issue where docker is slow to start because of low entropy on standard PDs since v4.14.63 merge.
  • Enabled CONFIG_RANDOM_TRUST_CPU to address entropy starvation on PD-SSD boot disks.
  • Upgraded OpenSSL to 1.0.2p
  • Merged Linux stable version v4.14.65
  • Backported the fix for a cloud-init bug that write_files can't deal with non-asci content .
  • Backport fix for a kernel warning "WARNING: fs/overlayfs/readdir.c:393 ovl_iterate+0x25c/0x260 WARN_ON(!cache->refcount)"
  • Fix for Linux Kernel CVE-2018-12232
  • Backport fixes for L1 Terminal Fault (L1TF) issue (CVE-2018-3615, CVE-2018-3620 and CVE-2018-3646).
  • Fixes for CVE-2018-5391.
  • Fixed a softlockup issue that occurred on single VCPU VMs when using FUSE filesystems.
  • Updated Kubernetes to v1.11.1
  • Fixes for CVE-2018-5390.
  • Increase default kernel.pid_max to 2^22.
  • Merged Linux stable version v4.14.54 into the kernel.
  • Removed SCSI CD-ROM support. This resolves CVE-2018-11506.
  • Upgraded built-in kubelet to v1.11.0
  • Updated docker-credential-gcr to 1.5.0
  • Updated BUG_REPORT_URL in /etc/os-release.
  • Enabled NFS debug configs in the kernel.
  • Enabled tcp_bbr kernel module for TCP congestion control.
  • Upgraded Git to version 2.16.4 to fix CVE 2018-11235.
  • Set '--disable-legacy-registry' Docker config to true by default.
  • Updated Kubernetes to 1.10.4.
  • Updated sshd_config to drop cbc based Ciphers.
  • Updated root CA certificates to match Mozilla NSS 3.36.1.
  • Updated OpenSSL to 1.0.2o.