Messages in this thread | | | Date | Fri, 6 Oct 2023 22:48:29 +0200 | Subject | Re: [PATCH] mtd: rawnand: cadence: Annotate struct cdns_nand_chip with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 10/6/23 22:17, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct cdns_nand_chip. > > Cc: Miquel Raynal <miquel.raynal@bootlin.com> > Cc: Richard Weinberger <richard@nod.at> > Cc: Vignesh Raghavendra <vigneshr@ti.com> > Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> > Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > Cc: Nicolas Ferre <nicolas.ferre@microchip.com> > Cc: Roger Quadros <rogerq@kernel.org> > Cc: Thierry Reding <treding@nvidia.com> > Cc: Yang Yingliang <yangyingliang@huawei.com> > Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> > Cc: Valentin Korenblit <vkorenblit@sequans.com> > Cc: ye xingchen <ye.xingchen@zte.com.cn> > Cc: linux-mtd@lists.infradead.org > Cc: linux-hardening@vger.kernel.org > Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks! -- Gustavo
> --- > drivers/mtd/nand/raw/cadence-nand-controller.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c > index 034ec564c2ed..7d5ef7ffe0fe 100644 > --- a/drivers/mtd/nand/raw/cadence-nand-controller.c > +++ b/drivers/mtd/nand/raw/cadence-nand-controller.c > @@ -526,7 +526,7 @@ struct cdns_nand_chip { > /* ECC strength index. */ > u8 corr_str_idx; > > - u8 cs[]; > + u8 cs[] __counted_by(nsels); > }; > > struct ecc_info {
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