The Linux Kernel Is Still Rectifying The Year 2038 Problem
Written by Michael Larabel in Linux Kernel on 19 November 2017 at 07:28 AM EST. 21 Comments
LINUX KERNEL --
The Linux kernel is still working to rectify the Year 2038 problem whereby the time values stored as signed 32-bit integers will wrap around.

If you somehow are not familiar with the Year 2038 "Y2038" problem, you can learn more via Wikipedia.

The Linux kernel has been receiving fixes and workarounds for years now through many Y2038 commits to work through the many different areas of the kernel that are relying upon 32-bit signed ints for storing time values. With Linux 4.15, this work has continued.

The security updates for the Linux 4.15 kernel merge window adds Y2038 fixes on top of Smack support for OverlayFS, audit subsystem changes, and more. The Year 2038 work in the security subsystem for 4.15 includes timestamping fixes for TOMOYO, the security module implementing mandatory access control.

The timer updates for Linux 4.15 also include more Year 2038 fixes. "More year 2038 work from Arnd slowly reaching the point where we need to think about the syscalls themself."

These fixes are mostly dropping the use of the deprecated do_gettimeofday() function to instead use the safer ktime_get_real_ts64() or ktime_get_seconds().

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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