| From: | Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> |
|---|---|
| To: | Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> |
| Cc: | exclusion(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org |
| Subject: | Re: BUG #18200: Undefined behaviour in interval_div |
| Date: | 2023-11-15 22:41:01 |
| Message-ID: | CAEZATCWar0wEJw_eQudbnpZsyC5VCcJ=hngaUD0ZEWWrm2LGbA@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, 15 Nov 2023 at 18:14, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> wrote:
>
> looking at
> interval_mul(), there is nothing to prevent integer overflow when
> cascading down, so additional checks are needed there too (in both
> functions).
>
Here's a patch doing that. I'm inclined to back-patch this, because
this seems like something that's quite easily triggered, and returning
bogus results is not good.
Regards,
Dean
| Attachment | Content-Type | Size |
|---|---|---|
| detect-interval-mul-div-overflow.patch | text/x-patch | 7.6 KB |
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