Re: [PATCH] mtd: intel-dg: fix array-index-out-of-bounds in intel_dg_mtd_probe()

Raag Jadav
2026-01-09T09:41:14Z

On Wed, Jan 07, 2026 at 03:17:40PM -0800, Randy Dunlap wrote:
> Hi,
>
> On 12/19/25 11:07 PM, Raag Jadav wrote:
> > On Sat, Dec 20, 2025 at 03:41:49PM +0900, Gustavo A. R. Silva wrote:
> >> Fix the UBSAN: array-index-out-of-bounds issue below by updating
> >> counter nvm->nregions before the first access to flexible-array
> >> member nvm->regions[].
> >>
> >> from kernel bugzilla:
> >> https://bugzilla.kernel.org/show_bug.cgi?id=220823
> >>
> >> Dec 15 22:01:52 orpheus kernel: UBSAN: array-index-out-of-bounds in /var/tmp/portage/sys-kernel/gentoo-kernel-6.18.1/work/linux-6.18/drivers/mtd/devices/mtd_intel_dg.c:750:15
> >>
> >> Notice that this flexible array is annotated with the counted_by()
> >> attribute, hence the counter must always be updated before the
> >> first access to the array.
> >
> > Already fixed[1], but not sure if it's landed yet.
> >
> > [1] https://lore.kernel.org/linux-mtd/20251111-mtd-nregions-v1-1-61db61e78c63@intel.com/
>
> What's the status of this patch, please?

I'm assuming it'll go through mtd tree? Miquel?

Raag