[PATCH 1/1] platform: generic: allwinner: avoid buffer overrun

[Bin Meng]

On Tue, Dec 27, 2022 at 9:04 PM Andreas Schwab <schwab at linux-m68k.org> wrote:
>
> On Dez 27 2022, Bin Meng wrote:
>
> > Changing the array size to PLIC_SOURCES + 1 does not make sense. The
> > PLIC_SOURCES should be 176 which is correct as it includes source 0 on
> > the Allwinner SoC. The "riscv,ndev" [1] should not be 176 otherwise it
> > will create a buffer overrun.
>
> The range check will always allow that overrrun.
>

Well, with a correct dtb it doesn't.

Strictly speaking, your proposed fix allows that overrun too, if the
given num is an arbitrary larger value than the size of the priority
array.

Regards,
Bin