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Cook: Bounded flexible arrays in C
source link: https://lwn.net/Articles/921799/
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Cook: Bounded flexible arrays in C
[Posted January 31, 2023 by corbet]
Kees Cook has posted a detailed document describing the work to improve safety of flexible-length arrays in the kernel.
Converting such codebases to use “modern” language features, like those in C99 (still from the prior millennium), can be a major challenge, but it is an entirely tractable problem. This post is a deep dive into an effort underway in the Linux kernel to make array index overflows (and more generally, buffer overflows) a thing of the past, where they belong. Our success hinges on replacing anachronistic array definitions with well-defined C99 flexible arrays.
This work has been covered here as well.
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