Re: [PATCH v3] of/address: Fix NULL bus dereference in of_pci_range_parser_one()

On Mon, Jul 27, 2026 at 3:47 AM Carlo Caione <[email protected]> wrote:
>
> On Mon Jul 27, 2026 at 10:46 AM CEST, sashiko-bot wrote:
> > Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> >
> > Pre-existing issues:
> > - [High] An integer overflow in the calculation of `np` (`np = parser->pna + na + ns`) can be triggered by a maliciously crafted Device Tree with a large positive `#size-cells` value (e.g., `0x7FFFFFFE`). This results in a negative `np` which bypasses the bounds check `parser->range + np > parser->end`.
>
> [...]
> > [Severity: High]
> > This isn't a bug introduced by this patch, but can this integer calculation
> > overflow?
>
> Not going to endless-ly fix pre-existing issues.

Agreed. I'm not sure this one is worth "fixing".

Rob