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

Raag Jadav
2026-01-09T15:16:41Z

On Fri, Jan 09, 2026 at 02:50:18PM +0100, Miquel Raynal wrote:
> On 09/01/2026 at 10:41:08 +01, Raag Jadav <raag.jadav@intel.com> wrote:
> > 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?
>
> It should indeed. However only the mtd list has been included, so it
> won't appear in "my" todo list. Lucas can you please resend, and use a
> tool such as b4 to manage the series or at least run get_maintainers.pl?

Lucas is no longer with Intel. Sasha, would you be up for it?

Raag