> which would make the other checks I suggested to ensure that neither start
> or end were more than (uint64_t)LLONG_MAX unnecessary.
My apologies I was wrong about what I said above - after thinking about it for
longer you still need to make sure that at least len is not greater than
(uint64_t)LLONG_MAX because in the calculation:
if (start > (uint64_t)LLONG_MAX - len)
return -EINVAL;
if len was more than (uint64_t)LLONG_MAX it would underflow and become a very
large positive number and start would never be greater than that (and I said
end when I should have said len).
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