Re: [PATCH 8/9] vdap: solidrun: Replace deprecated PCI functions

Andy Shevchenko
2024-08-19T18:34:49Z

On Mon, Aug 19, 2024 at 08:19:28PM +0200, Christophe JAILLET wrote:
> Le 19/08/2024 à 18:51, Philipp Stanner a écrit :

...

> Unrelated to the patch, but is is safe to have 'name' be on the stack?
>
> pcim_iomap_region()
> --> __pcim_request_region()
> --> __pcim_request_region_range()
> --> request_region() or __request_mem_region()
> --> __request_region()
> --> __request_region_locked()
> --> res->name = name;
>
> So an address on the stack ends in the 'name' field of a "struct resource".
>
> According to a few grep, it looks really unusual.
>
> I don't know if it is used, but it looks strange to me.

It might be used when printing /proc/iomem, but I don't remember by heart.

> If it is an issue, it was apparently already there before this patch.

This series seems to reveal a lot of issues with the probe/remove in many
drivers. I think it's better to make fixes of them before this series for
the sake of easier backporting.

If here is a problem, the devm_kasprintf() should be used.

--
With Best Regards,
Andy Shevchenko