Re: [RESEND PATCH v2] params: Annotate struct module_param_attrs with __counted_by()

From: Andy Shevchenko
Date: Fri Sep 13 2024 - 14:40:20 EST


On Fri, Sep 13, 2024 at 09:46:30AM -0700, Nathan Chancellor wrote:
> On Mon, Sep 09, 2024 at 06:27:26PM +0200, Thorsten Blum wrote:
> > Add the __counted_by compiler attribute to the flexible array member
> > attrs to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
> > CONFIG_FORTIFY_SOURCE.
> >
> > Increment num before adding a new param_attribute to the attrs array and
> > adjust the array index accordingly. Increment num immediately after the
> > first reallocation such that the reallocation for the NULL terminator
> > only needs to add 1 (instead of 2) to mk->mp->num.
> >
> > Use struct_size() instead of manually calculating the size for the
> > reallocation.
> >
> > Use krealloc_array() for the additional NULL terminator.

> > /* Fix up all the pointers, since krealloc can move us */
> > for (i = 0; i < mk->mp->num; i++)

Shouldn't this for loop and followed by assignment also be -1:ed?

--
With Best Regards,
Andy Shevchenko