Messages in this thread | | | Date | Fri, 15 Sep 2023 14:50:02 -0600 | Subject | Re: [PATCH] mtd: rawnand: sunxi: Annotate struct sunxi_nand_chip with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 9/15/23 14:13, 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 checking 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 sunxi_nand_chip. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Miquel Raynal <miquel.raynal@bootlin.com> > Cc: Richard Weinberger <richard@nod.at> > Cc: Vignesh Raghavendra <vigneshr@ti.com> > Cc: Chen-Yu Tsai <wens@csie.org> > Cc: Jernej Skrabec <jernej.skrabec@gmail.com> > Cc: Samuel Holland <samuel@sholland.org> > Cc: Manuel Dipolt <mdipolt@robart.cc> > Cc: linux-mtd@lists.infradead.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-sunxi@lists.linux.dev > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks -- Gustavo
> --- > drivers/mtd/nand/raw/sunxi_nand.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c > index 9abf38049d35..4ec17c8bce5a 100644 > --- a/drivers/mtd/nand/raw/sunxi_nand.c > +++ b/drivers/mtd/nand/raw/sunxi_nand.c > @@ -197,7 +197,7 @@ struct sunxi_nand_chip { > u32 timing_cfg; > u32 timing_ctl; > int nsels; > - struct sunxi_nand_chip_sel sels[]; > + struct sunxi_nand_chip_sel sels[] __counted_by(nsels); > }; > > static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
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