Messages in this thread | | | Date | Fri, 15 Sep 2023 14:47:19 -0600 | Subject | Re: [PATCH] leds: lm3697: Annotate struct lm3697 with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 9/15/23 14:10, 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 lm3697. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Pavel Machek <pavel@ucw.cz> > Cc: Lee Jones <lee@kernel.org> > Cc: linux-leds@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks -- Gustavo
> --- > drivers/leds/leds-lm3697.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c > index cfb8ac220db6..380d17a58fe9 100644 > --- a/drivers/leds/leds-lm3697.c > +++ b/drivers/leds/leds-lm3697.c > @@ -89,7 +89,7 @@ struct lm3697 { > int bank_cfg; > int num_banks; > > - struct lm3697_led leds[]; > + struct lm3697_led leds[] __counted_by(num_banks); > }; > > static const struct reg_default lm3697_reg_defs[] = {
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