It's always nice to see fixes of problems found with improved testing. It would be nice to see something like Haskells QuickCheck rigorously applied on the majority of the kernel functions/interfaces.
(disclamer: I'm one of the QuickFuzz [0] developers and I'm very interested in testing for this kind of bugs)
https://labdcc.fceia.unr.edu.ar/~amista/article.pdf
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