[gpderetta]

If I read it correctly, your implementation might read beyond the end of the buffer, and if it crosses a page boundary into an unmapped page, it will segfault. That's one of the many evils of null terminated strings.

[orlp]

If we go by the absolute strictest interpretation of the C standard, yes, the above is UB.

But in practice no one has page boundaries that cross word boundaries, and I align to a word boundary before doing the word-by-word loop.

[gpderetta]

good point of course!