It's been nearly two years in the making since Intel posted FGKASLR patches for improving Linux kernel security. While that work on Finer Grained / Function Granular KASLR stalled for a year, in recent months work on it was revived and it looks like this security feature is on a path for mainlining in 2022.

FGKASLR is a step-up over the Kernel Address Space Layout Randomization widely used right now by the Linux kernel for thwarting attacks relying upon known positions of the kernel within memory. Rather than just randomizing the base address that can be figured out with enough guessing or leakage, FGKASLR will randomize the layout down to a code function level.