On Wed, Jun 2, 2021 at 3:05 AM Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote:
>
> Import rational_best_approximation() from Linux. This is used by an
> upcoming update of the clk_fractional_divider code.
> + if ((n2 > max_numerator) || (d2 > max_denominator)) {
> + unsigned long t = min((max_numerator - n0) / n1,
> + (max_denominator - d0) / d1);
> +
There is a divide by zero bug in this version if the input is greater
than the largest value allowed or less than the smallest non-zero
value allowed. I sent a patch to lkml for this a week ago,
https://lore.kernel.org/patchwork/patch/1436255/
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