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Container Linux versions based on kernel 4.14.96 have broken POSIX timers #2549

urisimchoni opened this Issue Feb 12, 2019 · 1 comment


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urisimchoni commented Feb 12, 2019

Issue Report


Container Linux Version

Unknown (issue happens at my SaaS CI infrastructure), but the kernel is:
uname -a
Linux 6af282fe-9334-4ae9-8a12-a75fabd6c201 4.14.96-coreos #1 SMP Mon Jan 28 05:16:10 -00 2019 x86_64 x86_64 x86_64 GNU/Linux


Bitbucket pipelines

Expected Behavior

Posix timers generate periodic signals if configured to do so

Actual Behavior

Posix timers generate a signal just once

Reproduction Steps

I'm skipping this because the problem is well understood and has an upstream fix - see below.

Other Information

Kernel 4.14.96, used by Container Linux 1967.5.0 and 1967.4.0, has a regression with POSIX timers. The fix is in 4.14.97, see kernel release notes under "posix-cpu-timers: Unbreak timer rearming".

This is the same bug as reported in

This breaks some tests that we run in Bitbucket pipelines, which seem (according to reported kernel version) to run Container Linux.


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bgilbert commented Feb 12, 2019

This should be fixed in 1967.6.0, due shortly. Thanks for reporting!

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